Misleading New Entity in Tumors of Kidney: A Case Report and Literature Review

Introduction: Mucinous tubular and spindle cell carcinomas (MTSCC's) are recently described rare type of renal cell carcinoma (RCC). They may have morphological similarities to papillary RCC (papRCC) and in our case to carcinoma collecting ducts of Bellini. Case report: We report a rare case of renal tumor, mucinous tubular and spindle cell carcinoma in a 56-year-old woman. The tumor, located in the left kidney, was well circumscribed. MTSCC's are characterized by small, elongated tubules lined by cuboidal cells and/or cords of spindled cells separated by pale mucinous stroma. Discussion: MTSCC is a rare type of renal cell carcinoma. Pathologists should be aware of the histological spectrum of MTSCCs to ensure an accurate diagnosis. Careful attention to the presence of a spindle cell population may be helpful in the differential diagnosis in tumors with predominant compact tubular growth.

Aggressive angiomyxoma pelvis presenting as an ovarian tumor

Aggressive angiomyxoma is rare mesenchymal tumor that most commonly arises in the vulvo-vaginal region, perineum, and pelvis of women. The term aggressively emphasizes the often infiltrative nature of the tumor and its frequent association with local recurrence. Preoperative diagnosis and treatment may be difficult. We report a 55-year-old patient who presented with a pelvic mass with no significant medical history. The radiological assessment showed a pelvic cystic tumor retro and lateral bladder. A surgical excision was performed with a diagnosis of aggressive angiomyxoma pelvis that misdiagnosed as ovarian tumor. The patient received adjuvant radiotherapy after surgery and remains well with no signs of local recurrence at 12 months follow-up. As surgery is the main treatment, preoperative diagnosis and assessment of extent of the tumor for planning surgery can not be overemphasized. The authors discuss this finding through the diagnostic difficulties and the evolution of this entity.

Rare tumor of the ovary: Primitive choriocarcinoma

We report the case of a patient of 30 years with primary choriocarcinoma of the ovary. This patient referred for abdomino-pelvic mass suspected clinically and sonographically. Exploratory laparotomy was performed with the presence of two latero-uterine mass adherents to the highly vascularised uterus and difficult to resects deep plane with a mass left hepatic bleeding. A biopsy of both masses was performed and histological examination with immunehistochemical study returned for a primary ovarian non-gestational choriocarcinoma and the patient received 4 cycles of chemotherapy after hepatic artery embolization with good clinical, biological and radiological evaluation.

Synovial Sarcoma of Hand Presenting as A Cystic Mass

Synovial sarcoma is a rare mesenchymal tumor. It occurs predominantly in the extremities especially in the region of the knee. The localization in palm hand is rare. We report a case of a 23 year-old man who present a monophasic synovial sarcoma of the left hand which presented as a painless cystic nodule. A surgical excision was performed. The result was good without recurrence. The synovial sarcoma is a rare malignant neoplasm that should be considered in the differential diagnosis of spindle neoplasms of hand.

Rare Tumors of Ovary: Case Report and Literature Review

Introduction: Large cell neuroendocrine carcinoma (LCNEC) or non small cell neuroendocrine carcinoma the ovary is a rare entity and is frequently associated with ovarian surface epithelial tumors. However, its association with serous carcinoma is rarer, in our knowledge tree cases has been described in international literature and the first case in Moroccan literature. Case Report: A 54-year-old woman presented with a pelvic mass measuring 15 cm in diameter. She underwent an exploratory laparotomy with resection of the pelvic mass. Diffuse and nodular intra-abdominal disseminations were observed. Immunohistochemistry stain confirmed the diagnosis of large cell neuroendocrine carcinoma with serous carcinoma. The patient received three courses of carboplatin and paclitaxel and she's still alivewith a decline of 6 months. Its clinicopathologic association is discussed and the literature is reviewed. Conclusion: In summary, ovarian LCNEC is an aggressive tumor with a tendency to present at advanced stage and cause death within a mean of 17 months after diagnosis;however, some patients, particularly those with stage I disease and/or those who have received platinum-based therapy, may have a more favorable prognosis.

Tumor Misdiagnosed As Cancer of the Sphenoid Sinus: Case Report and Literature Review

Respiratory epithelial adenomatoid hamartoma (REAH) is an uncommon lesion of the upper aerodigestive tract first described by Wenig and Heffner in 1995 as prominent glandular proliferations lined by ciliated respiratory epithelium originating from the surface epithelium. Case Report: We report a case of 48-year-old women with nasal polyposis history, which consults for nasal obstruction, with suspicion of malignancy on CT. Surgical resection showed a respiratory epithelial adenomatoid hamartoma (REAH) of the nasal cavity. Conclusion: REAH is a recently described pathologic entity that can present rhinorrhea, epistaxis, hyposmia, and headaches. It is a rare lesion of nasal and paranasal sinuses, but should be considered in the differential diagnosis because it is a benign lesion and complete surgical resection is curative.

Liponeurocytoma of the Cerebellum with Myoid Features

We report an extremely rare tumor presenting with myoid features in the left cerebellum lobe in a 62-year-old man. This tumor consisted of medium to large round cells with focal lipomatous and myoid differentiation. Immunohistochemically, the tumor cells expressed synaptophysin, GFAP (glial fibrillary acidic protein) and focally desmin. From these findings, we concluded that this tumor was a liponeurocytoma with myoid features. To our knowledge, this is the second report of liponeurocytoma with myoid differentiation in the cerebellum.