Résumé
Liposarcoma is the second most common soft tissue sarcoma next to malignant fibrous histiocytoma and occurs almost exclusively in adults. It is thought to originate from primitive mesenchymal cells rather than from mature adipose tissue. Most liposarcomas usually occur in the deep soft tissue of the extremities and the retroperitoneum, and rarely occur in the cutaneous or subcutaneous tissue. We report a case of an atypical lipomatous tumor in a 63-year-old male, who presented with an asymptomatic, subcutaneous mass on his right axilla.
Sujets)
Adulte , Humains , Mâle , Adulte d'âge moyen , Tissu adipeux , Aisselle , Membres , Histiocytome fibreux malin , Liposarcome , Sarcomes , Tissu sous-cutanéRésumé
Pilomatricoma is a benign adnexal tumor, differentiating towards elements of the hair matrix and shaft. The tumor typically presents as a solitary, deep-seated, firm nodule with overlying normal epidermis. Herein, we report three cases of pilomatricomas with the dermal bullae overlying tumors. Histopathological examination of the lesions showed marked lymphatic dilatations, edema, and attenuated collagen and elastic fibers above the pilomatricomas in the upper dermis. We diagnosed them as lymphangiectatic pilomatricomas.
Sujets)
Collagène , Derme , Dilatation , Oedème , Tissu élastique , Épiderme , Poils , PilomatrixomeRésumé
Pilomatricoma is a benign adnexal tumor, differentiating towards elements of the hair matrix and shaft. The tumor typically presents as a solitary, deep-seated, firm nodule with overlying normal epidermis. Herein, we report three cases of pilomatricomas with the dermal bullae overlying tumors. Histopathological examination of the lesions showed marked lymphatic dilatations, edema, and attenuated collagen and elastic fibers above the pilomatricomas in the upper dermis. We diagnosed them as lymphangiectatic pilomatricomas.
Sujets)
Collagène , Derme , Dilatation , Oedème , Tissu élastique , Épiderme , Poils , PilomatrixomeRésumé
Spitz nevi, benign melanocytic tumors, have some histologic resemblance to malignant melanoma. They usually appear as asymptomatic, solitary, reddish to pinkish, hairless, dome-shaped, round to oval, smooth-surfaced papules or nodules, measuring less than 1.0 cm in diameter. Histologically, these lesions display striking nests of large spindle cells and epithelioid cells, usually extending from the epidermis to the reticular dermis. Here in, we report a case of Spitz nevus on the helix of the right ear of a 23-year-old man which was treated with Er:YAG laser.
Sujets)
Humains , Jeune adulte , Derme , Oreille , Épiderme , Cellules épithélioïdes , Mélanome , Naevus , Naevus à cellules épithelioïdes et fusiformes , GrèvesRésumé
Tubular apocrine adenoma is a well-circumscribed, intradermal benign tumor, with tubular structures showing apocrine differentiation. Histologically, the characteristic features are various-sized dilated tubules with intraluminary papillary projection and apocrine decapitation secretion. It usually presents as a solitary lesion and is sometimes associated with nevus sebaceous and/or syringocystadenoma papilliferum. We have in report a case of tubular apocrine adenoma with epidermal cysts which developed in the right inguinal area of a 37-year-old man.