[Yolk sac tumor revealed by an ascite of great abundance]. / Tumeur vitelline de l'ovaire révélée par une ascite de grande abondance.

We report the case of a 16-year-old girl explored for an ascite of great abundance responsible for a respiratory embarrassment. Its symptomatology proved to be secondary to a vitelline tumour of the ovary. It required several drainings of ascite before surgical operation. She had a conservative treatment followed up by a chemotherapy which allowed a clinical and biological remission. We report this observation considering the originality of the mode of revelation of the tumour. We insist in addition on the possibility of a conservative treatment.

[Adenomatoid odontogenic tumor: two cases]. / La tumeur odontogénique adénomatoïde: deux cas.

INTRODUCTION: Adenomatoid odontogenic tumor, initially referred to as adenoameloblastoma, is a rare and benign odontogenic tumor. No recurrence has been reported after enucleation-resection. CASE REPORTS: We report two cases of adenomatoid odontogenic tumor, which illustrate the radiological and anatomic features of this tumor. They occurred in two 21 and 14 years-old teenagers who presented gingival swelling. The panoramic radiographs showed a radiolucent lesion with an impacted tooth. Enucleation-resection was performed with good outcome. DISCUSSION: The clinical, radiological and histological features of adenomatoid odontogenic tumor are distinct from those of ameloblastoma. It affects most commonly patients in the second decade of life predominantly females. This tumor is frequently misdiagnosed as other odontogenic cysts or tumors. We discuss the anatomoclinical features and the histogenesis of this rare tumor.

[Primary bone leiomyosarcoma. Anatomo-clinical, immunohistochemical, and ultrastructural study]. / Le léiomyosarcome primitif de l'os. Une observation anatomo-clinique, immuno-histochimique et ultrastructurale.

A variety of tissues in bone can be the origin of neoplastic primitive lesions. Consequently, it can be the site of various sarcomas of tissue type, incursing leiomyosarcoma. The leiomyosarcoma of the bone is considered as primitive after exclusion either a bony extension of a soft tissue tumor of vicinity or the presence of a leiomyosarcoma elsewhere. We report a case of a primary leiomyosarcoma arising on the left femur of a 40-year-old woman. The diagnosis was confirmed by immuno-histochemistry and electron microscopic study. A bloc resection followed by a prothesis was performed. The patient underwent a fractioned postoperative radiotherapy with a total dose of 75 Gy. The postoperative course one year later revealed local recurrence and pulmonary metastases. Despite the resection of pulmonary metastases and the amputation of left lower limb, the patient had developed local recurrence on the stump of amputated limb and was on the outside of all therapeutic resource. In this report, we present the clinicopathologic, immuno-histochemical and ultrastructural profiles of these rare primary bone tumors.