Ciliary Body Schwannoma: A Case Report and Literature Review.

Purpose: To present a case of intraocular schwannoma arising from the ciliary body with description of histological and immunophenotypic characteristics. Case Report: A 32-year-old woman who was followed for glaucoma of the left eye and chronic renal failure at the stage of hemodialysis presented with buphthalmos and two weeks of blurry vision of the left eye. A magnetic resonance imaging exam was performed suspecting melanoma. Enucleation was rapidly performed. The histological examination after HE (Hematoxylin and Eiosin) and HEA50 (Hematoxylin and polychromatic solution EA 50) staining showed proliferation of mesenchymal monomorphic fusiform cells with eosinophilic cytoplasm and small oval nuclei which showed a tendency toward palisading. Some parts of the tumor were hypercellular with a fascicular arrangement (Antoni A pattern); other parts were weakly cellular with a myxoid arrangement (Antoni B pattern). Several Verocay bodies and a lot of hemorrhagic suffusions were described. Mitotic figures were very rare. Immunohistochemistry staining showed that tumor cells were positive for PS100 and vimentin. Conclusion: Although ciliary body schwannoma is extremely rare, it should be considered in the differential diagnosis of intraocular tumors.

[Angiomatoid tumor of the thyroid gland: primitive angiosarcoma or variant of anaplastic carcinoma?]. / Tumeur angiomatoïde de la thyroïde: angiosarcome primitif ou variante du carcinome anaplasique?

Thyroid gland angiomatoid tumors are an extremely aggressive neoplasms with varied histological patterns and features of endothelial differentiation. The histogenesis of thyroid angiomatoid tumors has been controversial for many years: these tumors may be either a variant of anaplastic carcinoma, or an angiosarcoma. We report a case of thyroid angiomatoid tumor in a 68-year-old woman. We also discuss, through a review of the literature, the pathologic criteria that could be used to distinguish between angiosarcoma and anaplastic carcinoma of the thyroid.

[Myxoid plexiform fibrohistiocytic tumor without multinucleated giant cells]. / Tumeur fibro-histiocytaire plexiforme myxoïde sans cellules géantes multinucléées.

Plexiform fibrohistiocytic tumour is a rare soft-tissue tumour of intermediate malignancy. It is more prevalent in children and in young adults. We report a case of this tumour presenting as a nontender swelling on the shoulder of an 8-year-old girl. Clinically, the mass was subcutaneous and measured 2 cm in greatest diameter. The histopathological examination revealed a mesenchymal dermic and subcutaneous tumour composed of confluent nodules. These nodules were made of aggregates of histiocyte-like cells and concentric fascicles of spindle cells. The stroma was myxoïd or collagenous. This case was particular by the lack of giant cells and the focally myxoid background. The epidemiologic, clinicopathologic features and outcome of this lesion are discussed and similar published cases are reviewed.

[Inverted papilloma of the ureter: a case report]. / Papillome inversé de l'uretère.

Inverted urothelial papilloma is a rare tumour particularly in the ureter. It is difficult to distinguish microscopically from low-grade urothelial carcinoma, inverted type. The authors report a new case of ureteric inverted papilloma in a 64-year-old man and discuss the histological diagnostic criteria, clinical features and prognosis of this tumour.