Hepatic perivascular epithelioid cell tumors:Benign,malignant,and uncertain malignant potential

In 2013,the World Health Organization defined perivascular epithelioid cell tumor(PEComa)as“a mesenchymal tumor which shows a local association with vessel walls and usually expresses melanocyte and smooth muscle markers.”This generic definition seems to better fit the PEComa family,which includes angiomyolipoma,clear cell sugar tumor of the lung,lymphangioleiomyomatosis,and a group of histologically and immunophenotypically similar tumors that include primary extrapulmonary sugar tumor and clear cell myomelanocytic tumor.Clear cell tumors with this immunophenotypic pattern have also had their malignant variants described.When localizing to the liver,preoperative radiological diagnosis has proven to be very difficult,and most patients have been diagnosed with hepatocellular carcinoma,focal nodular hyperplasia,hemangioma,or hepatic adenoma based on imaging findings.Examples of a malignant variant of the liver have been described.Finally,reports of malignant variants of these lesions have increased in recent years.Therefore,we support the use of the Folpe criteria,which in 2005 established the criteria for categorizing a PEComa as benign,malignant,or of uncertain malignant potential.Although they are not considered ideal,they currently seem to be the best approach and could be used for the categorization of liver tumors.

Alleviatory effect of isoquercetin on benign prostatic hyperplasia via IGF-1/PI3K/Akt/mTOR pathway

We evaluated the effect of isoquercetin(quercetin-O-3-glucoside-quercetin,IQ)as a functional component of Abeliophyllum disistichum Nakai ethanol extract(ADLE)on prostate cell proliferation and apoptosis and its effects on the IGF-1/PI3K/Akt/mTOR pathway in benign prostatic hyperplasia(BPH).Metabolites in ADLE were analyzed using UHPLC-qTOF-MS and HPLC.IQ was orally administered(1 or 10 mg/kg)to a testosterone propionate-induced BPH rat model,and its effects on the prostate weight were evaluated.The effect of IQ on androgen receptor(AR)signaling was analyzed in LNCaP cells.Whether IGF-1 and IQ affect the IGF-1/PI3K/Akt/mTOR pathway in BPH-1 cells was also examined.The metabolites in ADLE were identified and quantified,which confirmed that ADLE contained abundant IQ(20.88 mg/g).IQ significantly reduced the prostate size in a concentration-dependent manner in a BPH rat model,and significantly decreased the expression of AR signaling factors in the rat prostate tissue and LNCaP cells in a concentration-dependent manner.IQ also inhibited the PI3K/AKT/mTOR pathway activated by IGF-1 treatment in BPH-1 cells.In BPH-1 cells,IQ led to G0/G1 arrest and suppressed the expression of proliferation factors while inducing apoptosis.Thus,IQ shows potential for use as a pharmaceutical and nutraceutical for BPH.

Sporadic gastrinoma with refractory benign esophageal stricture:A case report

BACKGROUND Gastrinoma is characterized by an excessive release of gastrin,leading to hypersecretion of gastric acid,subsequently resulting in recurrent peptic ulcers,chronic diarrhea,and even esophageal strictures.This case report aims to improve awareness and facilitate early diagnosis and treatment of gastrinoma by presenting a rare case of gastrinoma with refractory benign esophageal stricture(RBES).Additionally,it highlights the persistent challenges that gastroenterologists encounter in managing RBES.CASE SUMMARY This case demonstrates a patient with gastrinoma who developed RBES and complete esophageal obstruction despite management with maximal acid suppressive therapy,multiple endoscopic bougie dilations and endoscopic incisional therapy(EIT).CONCLUSION It is essential to diagnose gastrinoma as early as possible,as inadequately controlled acid secretion over an extended period increases the risk of developing severe esophageal strictures.In patients with esophageal strictures causing complete luminal obstruction,blind reopening EIT presents challenges and carries a high risk of perforation.

Echinacoside attenuates glandular fibrosis in benign prostatic hyperplasia via inhibiting MKK6/MK2 signaling pathway

Background:Lower urinary tract symptoms commonly occur in the elderly population and seriously constrain the quality of life.Glandular fibrosis is an important pathobiological process in benign prostatic hyperplasia and is also a main inducing factor for benign prostatic hyperplasia-associated lower urinary tract symptoms.Cistanches species is an important herbal medicine resource and is traditionally used in ameliorating renal and prostatic defects.Methods:This study was to investigate the potential protective function of echinacoside(a bioactive compound from Cistanches)against prostatic fibrosis in mice and human benign prostatic hyperplasia epithelial-1 cell models.Results:It was found that echinacoside attenuated testosterone-induced prostatic hyperplasia and collagen deposition in mice,relieved prostate local inflammation and oxidative damage,and ameliorated prostatic epithelial-mesenchymal transition.Additionally,echinacoside inhibited the activation of the MKK6/MK2 signaling pathway both in vivo and in vitro.Conclusion:This study added new evidence for the anti-fibrotic function of echinacoside on the prostate and provided new insights for understanding its possible pharmacological mechanisms.

Treatment of benign rectal stricture caused by repeated anal insertion by endoscopy and balloon dilation:A case report

BACKGROUND Benign rectal strictures can be categorized as primary(disease-related)and secondary(surgical anastomosis-related).Secondary strictures arise from surgical complications,whereas primary strictures have diverse etiologies,including various inflammatory conditions.Benign strictures are usually managed by surgery and endoscopy.We present an unusual etiology of benign rectal stricture caused by the repeated insertion of foreign objects into the rectum for sexual purposes,resulting in rectal injury and subsequent chronic inflammation.CASE SUMMARY A 53-year-old man presented to the outpatient clinic of the Colorectal Surgery Department with symptoms of chronic constipation and bloody stools.The patient previously experienced rectal injury due to foreign object insertion for sexual purposes.Colonoscopy revealed benign circumferential narrowing of the rectum.He underwent treatment by endoscopic argon plasma coagulation and balloon dilation and follow-up as an outpatient for 4 months.A colonoscopy at the end of the follow-up period revealed no evidence of rectal stricture relapse.CONCLUSION A history of rectal injury,followed by chronic inflammation,should be considered in patients with benign rectal strictures.Management with endoscopic argon plasma coagulation and balloon dilation can prevent the need for surgical resection of benign rectal strictures.

Benign Multicystic Peritoneal Mesothelioma: A Case Report

Benign multicystic peritoneal mesothelioma(BMPM)is a rare tumor originating from peritoneal mesothelial cells.Here,we present a case of an 18-year-old male with right lower abdominal pain.Physical examination revealed a palpable mass with unclear boundaries.Laboratory tests showed elevated levels of monocytes and high-sensitivity C-reactive protein.CT scan revealed a cystic mass in the ileocecal region with multiple septations.Laparoscopic surgery confirmed a cystic solid mass resembling beads on the colon’s right side.Immunohistochemistry confirmed BMPM diagnosis.BMPM,especially in the ileocecal region,is uncommon and presents diagnostic challenges.Differential diagnosis includes lymphangioma,peritoneal metastasis,and malignant mesothelioma.CT findings,such as thin cyst walls and septations,aid in diagnosis.Recognition of BMPM’s imaging features improves diagnostic accuracy.Surgical resection remains the primary treatment.This case underscores the importance of considering BMPM in young male patients with abdominal pain and emphasizes the value of imaging modalities in accurate diagnosis and management.

Alterations of gut microbiota diversity, composition and metabonomics in testosterone-induced benign prostatic hyperplasia rats

Background: Studies had shown many diseases affect the stability of human microbiota, but how this relates to benign prostatic hyperplasia(BPH) has not been well understood. Hence, this study aimed to investigate the regulation of BPH on gut microbiota composition and metabonomics.Methods: We analyzed gut samples from rats with BPH and healthy control rats, the gut microbiota composition and metabonomics were detected by 16S rDNA sequencing and liquid chromatography tandem mass spectrometry(LC–MS/MS).Results: High-throughput sequencing results showed that gut microbiota beta-diversity increased(P<0.01) in the BPH group vs. control group. Muribaculaceae(P<0.01), Turicibacteraceae(P<0.05), Turicibacter(P<0.01) and Coprococcus(P<0.01) were significantly decreased in the BPH group, whereas that of Mollicutes(P<0.05) and Prevotella(P<0.05)were significantly increased compared with the control group. Despite profound interindividual variability, the levels of several predominant genera were different. In addition, there were no statistically significant differences in several bacteria. BPH group vs. control group: Firmicutes(52.30% vs. 57.29%, P>0.05), Bacteroidetes(46.54% vs. 41.64%,P>0.05), Clostridia(50.89% vs. 54.66%, P>0.05), Ruminococcaceae(25.67% vs. 20.56%, P>0.05). LC–MS/MS of intestinal contents revealed that differential metabolites were mainly involved in cellular processes, environmental information processing, metabolism and organismal systems. The most important pathways were global and overview maps, lipid metabolism, amino acid metabolism, digestive system and endocrine system. Through enrichment analysis, we found that the differential metabolites were significantly enriched in metabolic pathways, steroid hormone biosynthesis,ovarian steroidogenesis, biosynthesis of unsaturated fatty acids and bile secretion. Pearson correlation analysis(R=0.94) showed that there was a strong correlation between Prevotellaceae, Corynebacteriaceae, Turicibacteraceae,Bifidobacteriaceae and differential metabolites.Conclusions: Our findings suggested an association between the gut microbiota and BPH, but the causal relationship between the two groups is unclear. Thus, further studies are warranted to elucidate the potential mechanisms and causal relationships between BPH and gut microbiota.

Management of urethral strictures and stenosis caused by the endo-urological treatment of benign prostatic hyperplasiad-a single-center experience

Objective:Urethral stricture disease after endo-urological treatment of benign prostatic hyperplasia(BPH)is a sparsely described complication.We describe management of five categories of these strictures in this retrospective observational case series.Methods:One hundred and twenty-one patients presenting with symptoms of bladder outflow obstruction after endo-urological intervention for BPH from February 2016 to March 2019 were evaluated.Among them,76 were eligible for this study and underwent reconstructive surgery.Preoperative and postoperative assessments were done with symptom scores,uroflowmetry,ultrasound for post-void residue,and urethrogram.Any intervention during follow-up was classed as a failure.The recurrence and 95%confidence interval for recurrence percentage were calculated.Results:The following five categories of patients were identified:Bulbo-membranous(33[43.4%]),navicular fossa(21[27.6%]),penile/peno-bulbar(8[10.5%]),bladder neck stenosis(6[7.9%]),and multiple locations(8[10.5%]).The average age was 69 years(range:60-84 years).Overall average symptom score,flow rate,and post-void residue changed from 21 to 7,6 mL/s to 19 mL/s,and 210 mL to 20 mL,respectively.The average follow-up was 34 months(range:12-58 months).Overall recurrence and complication rates were 10.5%and 9.2%,respectively.The recurrence in each category was seen in 3,1,2,1,and 1 patient,respectively.Overall 95% confidence interval for recurrence percentage was 4.66-19.69.Conclusion:Urethral stricture disease is a major long-term complication of endo-urological treatment of BPH.The bulbo-membranous strictures need continence preserving approach.Navicular fossa strictures require minimally invasive and cosmetic consideration.Peno-bulbar strictures require judicious use of grafts and flaps.Bladder neck stenosis in this cohort could be treated with endoscopic measures.Multiple locations need treatment based on their sites in single-stage as far as possible.

Different serum levels of IgG and complements and recurrence rates in IgG4-positive and negative lacrimal gland benign lymphoepithelial lesion

·AIM:To analyze the differences in immune indicators and prognosis between Ig G4-positive and negative lacrimal gland benign lymphoepithelial lesion(LGBLEL).·METHODS:This was a single-center retrospective clinical study including 105 cases of Ig G4-positive LGBLEL and 41 cases of Ig G4-negative LGBLEL.Basic information,related indicators of peripheral venous blood samples using immunoscattering turbidimetry,treatment(partial surgical excision and glucocorticoid therapy)and prognosis(recurrence and death)were collected.Survival curves for recurrence were created using the Kaplan-Meier analysis.Univariate analysis and multivariate regression analysis were used to analyze prognostic factors.·RESULTS:The mean age was 50.10±14.23y and 44.76±11.43y(P=0.033)in Ig G4-positive and negative group respectively.The serum C3 and C4 was lower in Ig G4-positive group(P=0.005,P=0.002),while the serum Ig G and Ig G2 was higher in Ig G4-positive group(P=0.000 and P=0.008).Twenty-one cases had recurrence in Ig G4-positive group and 3 cases recurrence in Ig G4-negative group.The 5-year recurrence-free cumulative percentages of Ig G4-positive group was 81.85%,and 83.46%in the Ig G-negative group(P=0.216).The history of preoperative glucocorticoid therapy,serum C4,Ig G1 and Ig G2 were the factors affecting recurrence in Ig G4-positive group,while serum C4,and Ig G1 were the factors affecting recurrence of LGBLEL.·CONCLUSION:Serum C4 and Ig G1 are the factors affecting recurrence of LGBLEL,while the Ig G4 does not affect recurrence of LGBLEL.

Association analysis of BclI with benign lymphoepithelial lesions of the lacrimal gland and glucocorticoids resistance

AIM:To evaluate the relationship between gene polymorphism(BclI,ER22/23EK,N363S)and the occurrence,progression and sensitivity to glucocorticoid of lacrimal gland benign lymphoepithelial lesion(LGBLEL).METHODS:Clinical peripheral blood samples of 52 LGBLEL patients and 10 normal volunteers were collected for DNA extraction and polymerase chain reaction sequencing to analyze single nucleotide polymorphism(SNP)genotypes.The lacrimal tissues of LGBLEL were surgically removed and made into paraffin sections for subsequent hematoxylin-eosin(HE)and Masson staining analysis.The duration of disease and hormone use of LGBLEL patients from diagnosis to surgery were also analyzed.The Meta-analysis follows PRISMA guidelines to conducted a systematic review of human studies investigating the relationship between the NR3C1 BclI polymorphism and glucocorticoids(GCs)sensitivity.RESULTS:There was no association between ER22/23EK or N363S and the occurrence of LGBLEL or GCs sensitivity(P>0.05);BclI GC genotype was closely related to GCs resistance(P=0.03)as is the minor allele C(P=0.0017).The HE staining and Masson staining showed that the GC genotype of BclI remarkably slowed down the disease progression and reduced fibrosis(P<0.05),especially for GCs-dependent patients(P<0.0001).Meta-analysis showed that BclI was not significantly associated with GCs responsiveness.CONCLUSION:The LGBLEL patients who carry the NR3C1 BclI allele C may be more sensitive to GCs and associated with lower fibrosis and slower disease progression.The results may guide the clinical treatment strategy for the LGBLEL patients.

Benign lymphoepithelial cyst of parotid gland without human immunodeficiency virus infection:A case report

BACKGROUND Benign lymphoepithelial cyst(BLEC)of the parotid gland is a rare benign embryonic-dysplastic cystic tumor in the anterolateral neck that occurs most commonly in human immunodeficiency virus(HIV)-positive adults and rarely in non-acquired immune deficiency syndrome patients.The main presentation is a slow-growing,painless mass,and secondary infection may cause acute inflammatory symptoms.CASE SUMMARY A 44-year-old Chinese male patient presented with a 1-year history of a mass in the left side of the neck.On physical examination,a mass similar in size and shape to a quail egg was found in the left parotid gland.The mass was tough,without tenderness,and easily moveable.The results of HIV tests,including antibody and nucleic acid tests and CD4+T cell examination,were negative.Imaging examination revealed a left parotid gland mass.The patient underwent surgical treatment,and BLEC was diagnosed based on postoperative pathology.After 2years of follow-up,the patient survived well without related discomfort.CONCLUSION The detailed characteristics of a BLEC in a patient without HIV infection contribute to an improved understanding of this rare disease.

Combined treatment of refractory benign stricture after esophageal endoscopic mucosal dissection:A case report

BACKGROUND Endoscopic submucosal dissection(ESD)post-procedure stricture is a relatively common long-term complication following ESD treatment.A range of approaches has been implemented for the treatment of post-procedural stricture using endoscopic techniques such as endoscopic dilation,self-expandable metallic stent insertion,local steroid injection in the esophagus,oral steroid administration,radial incision and cutting(RIC).The actual efficacy of these different therapeutic options is highly variable,and uniform international standards for the prevention or treatment of stricture.CASE SUMMARY In this report,we describe the case of a 51-year-old male diagnosed with early esophageal cancer.To protect against esophageal stricture,the patient was administered oral steroids and underwent self-expandable metallic stent insertion for 45 d.Despite these interventions,stricture was detected at the lower edge of the stent following its removal.The patient remained refractory to multiple rounds of endoscopic bougie dilation treatment,and thus suffered from complex refractory benign esophageal stricture.As such,RIC combined with bougie dilation and steroid injection was employed to treat this patient more effectively,ultimately achieving satisfactory therapeutic efficacy.CONCLUSION Combination of RIC,dilation,and steroid injection can be safely and effectively implemented to treat cases of post-ESD refractory esophageal stricture.

Endoscopic management of benign biliary strictures:Looking for the best stent to place

Benign biliary strictures(BBS)might occur due to different pancreaticobiliary conditions.The etiology and location of biliary strictures are responsible of a wide array of clinical manifestations.The endoscopic approach endoscopic retrograde cholangiopancreatography represents the first-line treatment for BBS,considering interventional radiology and surgery when endoscopic treatment fails or it is not suitable.The purpose of this review is to provide an overview of possible endoscopic treatments for the optimal management of this subset of patients.

Fournier’s gangrene after insertion of thermo-expandable prostatic stent for benign prostatic hyperplasia:A case report

BACKGROUND Thermo-expandable urethral stent(Memokath 028)implantation is an alternative treatment for older patients with lower urinary tract symptoms and benign prostatic obstruction.Following prostatic urethral stent implantation,minor complications such as urinary tract infection,irritative symptoms,gross hematuria,and urethral pain have been observed;however,there are no reports of life-threatening events.Herein,we report a critical case of Fournier’s gangrene that occurred 7 years after prostatic stenting.CASE SUMMARY An 81-years-old man with benign prostatic hyperplasia(volume,126 ccs;as measured by transrectal ultrasound)had undergone insertion of a thermoexpandable urethral stent(Memokath 028)as he was unfit for surgery under general anesthesia.However,the patient had undergone a suprapubic cystostomy for recurrent acute urinary retention 4 years after the insertion of prostatic stent(Memokath 028).We had planned to remove the Memokath 028;however,the patient was lost to follow-up.The patient presented to the emergency department 3 years after the suprapubic cystostomy with necrotic changes from the right scrotum to the right inguinal area.In digital rectal examination,tenderness and heat of prostate was identified.Also,the black skin color change with foulsmelling from right scrotum to right inguinal area was identified.In computed tomography finding,subcutaneous emphysema was identified to same area.He was diagnosed with Fournier’s gangrene based on the physical examination and computed tomography findings.In emergency room,Fournier’s gangrene severity index value is seven points.Therefore,he underwent emergent extended surgical debridement and removal of the Memokath 028.Broad-spectrum intravenous antibiotics were administered and additional necrotic tissue debridement was performed.However,the patient died 14 days after surgery due to multiorgan failure.CONCLUSION If Memokath 028 for benign prostatic hyperplasia is not working in older patients,its rapid removal may help prevent severe complications.

Review of oral and pharyngolaryngeal benign lesions detected during esophagogastroduodenoscopy

Recent advancements in endoscopy equipment have facilitated endoscopists’detection of neoplasms in the oral cavity and pharyngolaryngeal regions.In particular,image-enhanced endoscopy using narrow band imaging or blue laser imaging play an integral role in the endoscopic diagnosis of oral and pharyngolaryngeal cancers.Despite these advancements,limited studies have focused on benign lesions that can be observed during esophagogastroduodenoscopy in the oral and pharyngolaryngeal regions.Therefore,this mini-review aimed to provide essential information on such benign lesions,along with representative endoscopic images of dental caries,cleft palate,palatal torus,bifid uvula,compression by cervical osteophytes,tonsil hyperplasia,black hairy tongue,oral candidiasis,oral and pharyngolaryngeal ulcers,pharyngeal melanosis,oral tattoos associated with dental alloys,retention cysts,papilloma,radiation-induced changes,skin flaps,vocal cord paresis,and vocal fold leukoplakia.Whilst it is imperative to seek consultation from otolaryngologists or dentists in instances where the diagnosis cannot be definitively ascertained by endoscopists,the merits of attaining foundational expertise pertaining to oral and pharyngolaryngeal lesions are unequivocal.This article will be a valuable resource for endoscopists seeking to enhance their understanding of oral and pharyngolaryngeal lesions.

Simultaneous Management of Inguinal Hernia and Benign Prostatic Hypertrophy in a Single Operation at the Chu D’abeche/Chad

Introduction: Benign prostatic hypertrophy and inguinal hernia are related and frequent pathologies in people over 50 years old. Their incidence is 15% to 25% according to the literature. The occurrence of hernia during benign prostatic hyperplasia is favored by disorders of the lower urinary tract. Simultaneous single-stage treatment of these two pathologies makes it possible to obtain satisfactory results that can reduce the cost of hospital stay and the multiple risk of anesthesia. The aim of our study was to: 1) Report the epidemiological, anatomo-clinical and para-clinical aspects of hernias during benign prostatic hypertrophy;2) Evaluate the feasibility and the results of the combined treatment of inguinal hernia and prostatic adenectomy in a single operation. Patients and Method: This was a retrospective descriptive study over a period of 7 years from March 2014 to February 2021, including patients operated on simultaneously at the University Hospital of Abeche for inguinal hernia and benign prostatic hypertrophy. The variables studied were: age, antecedents, favouring factors, clinical symptomatology, para-clinical elements, treatments and results: Results: 356 patients underwent surgery for benign prostatic hyperplasia, 36 of whom had an associated inguinal hernia. The mean age was 65.5 years, ranging from 50 to 93 years. The main reason for consultation was chronic urinary retention. The average consultation time was 10.2 months. The inguinal hernia was located on the right in 51% of cases and on the left in 18.4%. The mean prostatic volume measured by suprapubic ultrasound was 60.5 ± 25 cc. 14% and 10.2% of patients respectively were found to have struggle bladder and bilateral ureterohydronephrosis. Transvesical suprapubic adenectomy of the prostate was performed in all patients. The Bassini technique was the most commonly used (91%) for hernia repair. The average hospital stay was 7.5 days. Conclusion: Simultaneous treatment of benign prostatic hypertrophy and inguinal hernia reduces the number of hospital admissions in elderly patients, as well as the length of hospital stay.

Top 50 most cited articles on prostatic artery embolization for benign prostatic hyperplasia:A bibliometric review

BACKGROUND Bibliometric analysis can be used to assess the current state of the literature and publication trends on a given topic.There has not been a review of this kind on prostatic artery embolization(PAE)for benign prostatic hyperplasia(BPH).PAE is a relatively new and somewhat controversial treatment option for BPH.Given the novelty and controversy,there has been much research published on the topic recently.AIM To survey the current state of research on PAE for BPH by using bibliometric analysis to analyze the top 50 most highly cited articles.METHODS A cross-sectional study was performed using the Web of Science database to identify the most cited articles published on PAE for BPH as of June 2022.Articles that did not primarily focus on PAE or BPH as an indication were eliminated.The 50 most cited articles were carried forward for analysis.RESULTS All but 6 articles were published in the last decade with contributions from 15 countries.Fifty-two percent of the studies had a C level of evidence.The majority were published in the Journal of Vascular and Interventional Radiology and Cardiovascular and Interventional Radiology.Twenty percent(n=10)of the articles were published in urologic journals.On average,articles published in urologic journals tended to be more recent.The mean year of publication for an article in a urological journal was 2016.6 compared to 2013.9 in a non-urologic journal(P=0.02).Seventy percent of the articles focused on clinical outcomes,while only 2%focused on practice guidelines.Self-citations accounted for 11.4 citations perarticle on average,corresponding to 14.7%of all citations analyzed.CONCLUSION The most influential papers on this topic represent a fairly recent body of work with contributions from a wide variety of countries and journals.The fact that articles in urologic journals were published significantly more recently than articles on the list in non-urologic journals may suggest that the field of urology is starting to accept PAE for a wider range of indications.Finally,while there has been much high-quality research published,more influential studies on practice guidelines and technique may be beneficial.

Pulmonary benign metastasizing leiomyoma: A case report and review of the literature

BACKGROUND Pulmonary benign metastatic leiomyoma(PBML),which is very rare,is a type of benign metastatic leiomyoma(BML).Here,we report a case of PBML,finally diagnosed through multidisciplinary team(MDT)discussions,and provide a literature review of the disease.CASE SUMMARY A 55-year old asymptomatic woman was found to have bilateral multiple lung nodules on a chest high-resolution computed tomography(HRCT)scan.Her medical history included total hysterectomy for uterine leiomyoma.The patient was diagnosed with PBML,on the basis of her clinical history,imaging manifestations,and computed tomography(CT)-guided percutaneous lung puncture biopsy,via MDT discussions.As the patient was asymptomatic,she received long-term monitoring without treatment.A follow-up of chest HRCT after 6 mo showed that the PBML lung nodules were stable and there was no progression.CONCLUSION For patients with a medical history of hysterectomy and uterine leiomyoma with lung nodules on chest CT,PBML should be considered during diagnosis based on the clinical history,imaging manifestations,CT-guided percutaneous lung puncture biopsy,and MDT discussions.

A Case Report on Pulmonary Benign Metastasizing Leiomyoma with Recurrent Uterine Fibroids

Pulmonary benign metastasizing leiomyoma(PBML)is a type of benign metastasizing leiomyoma(BML),which metastasizes to lungs.In view of the rarity and nonspecific imaging characteristics of PBML,this condition is easily misdiagnosed as malignant lung cancer.This is a case report of a 39-year-old lady in whom multiple bilateral lung nodules were found during a health checkup and was diagnosed with PBML.The patient had recurrent uterine fibroids and underwent myomectomy twice,7 years and 3 years ago,respectively,before the diagnosis of PBML was made.This patient was asymptomatic,and regular examinations were normal.Her laboratory investigations were all within normal range.Computed tomography(CT)showed multiple nodules in bilateral lungs.In order to confirm the disease,thoracoscopic nodule resection and tissue biopsy were performed.Hematoxylin eosin(HE)staining showed spindle-shaped cells,while immunohistochemical staining revealed positive for desmin,smooth muscle actin(SMA),estrogen receptor(ER),and progesterone receptor(PR),which are all PBML markers.The patient was followed-up without any further treatment.After 8 months of follow-up,CT scan revealed an increased number of nodules.This is unique case because of the recurrence of uterine fibroids,which means that the patient is susceptible to it.Our report may give a new insight to the relationship between the susceptibility of uterine fibroids and the onset and progression of PBML.

Benign liver tumors in pediatric patients-Review with emphasis on imaging features

Benign hepatic tumors are commonly observed in adults,but rarely reported in children.The reasons for this remain speculative and the exact data concerning the incidence of these lesions are lacking.Benign hepatic tumors represent a diverse group of epithelial and mesenchymal tumors.In pediatric patients,most benign focal liver lesions are inborn and may grow like the rest of the body.Knowledge of pediatric liver diseases and their imaging appearances is essential in order to make an appropriate differential diagnosis.Selection of the appropriate imaging test is challenging,since it depends on a number of age-related factors.This paper will discuss the most frequently encountered benign liver tumors in children(infantile hepatic hemangioendothelioma,mesenchymal hamartoma,focal nodular hyperplasia,nodular regenerative hyperplasia,and hepatocellular adenoma),as well as a comparison to the current knowledge regarding such tumors in adult patients.The current emphasis is on imaging features,which are helpful not only for the initial diagnosis,but also for pre- and posttreatment evaluation and follow-up.In addition,future perspectives of contrast-enhanced ultrasound(CEUS) in pediatric patients are highlighted,with descriptions of enhancement patterns for each lesion being discussed.The role of advanced imaging tests such as CEUS and magnetic resonance imaging,which allow for non-invasive assessment of liver tumors,is of utmost importance in pediatric patients,especially when repeated imaging tests are needed and radiation exposure should be avoided.