Microscopic examination of pituitary glands in cases of fatal accidental hypothermia

In cases of death caused by hypothermia,histological analysis can be used to determine the cause of death.Certain histological alterations of the pituitary glands in hypothermia have been reported in the literature,including haemorrhage,hyperaemia and cellular vacuolization of cells in the anterior lobe.In the present study,the validity of these morphological alterations as markers for fatal accidental hypothermia was investigated in autopsy material.A total of 34 pituitary glands in cases of verified fatal accidental hypothermia were examined histologically(haematoxylin and eosin,ferric,azan)and immunohistochemically(LCA,ACTH,C5b-9).The findings were compared with 61 cases in a control group.Hyperaemia was found in 50.0%of the study group cases and 59.0% of the control group cases.Cellular vacuolization was observed in one case(2.9%)in the study group and one case(1.6%)in the control group.Acute or recent haemorrhage in the glandular tissue was never detected.In our study,the histopathological characteristics described in the literature as pathognomonic for hypothermia could not be confirmed.Furthermore,histological differences in the pituitary glands between fatal hypothermia cases and control group cases were not observed.

Morphological comparison and gonadotropins cell localization of mature female turbot and mouse pituitary

Reproduction is subtlety regulated by the hypothalamic-pituitary-gonad(HPG)axis in vertebrates.Pituitary gland is the center of the HPG axis,while pituitary gonadotropins follicle stimulating hormone(FSH)and luteinizing hormone(LH)were identified the key elements of the HPG axis in teleost and mammal.Morphology,cell lines,and gonadotropins cell localization of female turbot and mouse pituitary were determined at mature stage to illustrate the anatomical difference and cell characteristics in this study.Results show that turbot pituitary is chicken heart-shaped,dorsoventral,located on the ventral surface of the diencephalon.The mouse pituitary is oval,located in the pituitary fossa of the sella turcica at the skull base.Two well-distinguished areas adenohypophysis(AH)and neurohypophysis(NH)in pituitary were identified in turbot and mouse.Turbot AH comprised the rostral pars distalis(RPD),proximal pars distalis(PPD),and pars intermedia(PI).NH was not pronounced and with finger-like protrusions into PPD.However,mouse AH only comprised the pars distalis(PD)and PI.NH distribution was semicircular.Three main types of cells(acidophilic,basophilic,and chromophobic cells)were distributed in the mouse PD region,whereas appeared in the turbot PPD,RPD,and PI.Moreover,the percentage of mouse chromophobic and basophilic cells was higher and lower than that of turbot,respectively.The diameter of the aforementioned three cells in the mouse was significantly higher than turbot.fshβ-and lhβ-immunoreactive signals were identified in turbot-distinct pituitary cells that primarily occupied the peripheral and central regions of AH.However,mouse fsh-and lh-immunoreactive cells were expressed in the same cells and present in the PD.These results demonstrate the significantly difference of pituitary morphology,cell lines and gonadotropins(fshβand lhβ)location in female turbot and mouse.These differences help for fully understand the evolution and endocrinological functions of pituitary.

Multisystem involvement Langerhans cell histiocytosis in an adult:A case report

BACKGROUND Langerhans cell histiocytosis(LCH)is a rare condition wherein Langerhans cells proliferate abnormally,adversely impacting organs including lymph nodes,bones,skin,lungs,and pituitary gland.The LCH disease course varies widely among patients from a self-limiting condition to one that progresses rapidly and culminates in death.It is uncommon for multisystem LCH to be observed in adults.Herein we describe a woman suffering from multi-system LCH involvement.CASE SUMMARY A 37-year old Chinese woman was admitted to the hospital in June 2019 suffering from dyspnea that had progressed over the course of 5 years.Her medical history included:central diabetes insipidus(DI)that had been treated via radiotherapy,desmopressin acetate,and bromocriptine;bilateral pneumothorax with two surgeries having been performed to remove bullae;and autoimmune hepatitis that had been unsuccessfully treated using a combination of methylprednisolone and mycophenolate mofetil.A chest computed tomography(CT)scan revealed the presence of multiple pulmonary cysts of varying sizes.We re-analyzed right pulmonary bullae samples that had been removed in 2014,performed a systematic 18 F-FDG PET/CT analysis,and convened a multidisciplinary medical team to diagnose and treat this patient.As a result,we were able to eventually diagnose this patient with LCH that was not associated with BRAF-V600 E mutations.CONCLUSION We hope to emphasize the importance of systemic evaluation and of cooperation between multidisciplinary physicians with the goal of improving awareness and detection of this orphan disease.

The Effect of Hormones of the Hypothalamic-pituitary-target Gland Axes in a Kidney-Yang Deficiency Syndrome Model

Kidney-yang deficiency syndrome(KYDS)is a diagnostic pattern in the traditional Chinese medicine.Studies have shown that KYDS is related to the functional disorder of hormones of the hypothalamic-pituitary-target gland axes.The standard procedure used to mimic KYDS is the injection of a high dose of exogenous glucocorticoid(hydrocortisone and corticosterone).Such a model showed symptoms such as exhaustion,body twists,cold limbs,lying crowded together,decreased rectal temperature,sexual dysfunction,decreased reaction speed,reduced spontaneous activity,hair loss,loss of appetite,and weight loss.Moreover,the model manifested an imbalance in mutual control among the hormones of the pituitary-target gland axes,including adrenocorticotrophic hormone,CORT,CRH,thyroid-stimulating hormone,triiodothyronine,thyroxine,T,E2,follicle-stimulating hormone,luteinizing hormone,and 17-OHCS.