Schwannomas of the penis are extremely rare. Only very few cases were reported previously in English-language literature. We are presenting a case of a 62-year-old man with a 3 x 2 cm, slowly growing, painless tumor on the dorsal penile shaft without any other symptoms. Histopathological examination of the excised tumor revealed benign schwannoma and diagnosis was confirmed by immunohistochemistry S-100 protein. We also reviewed previously published articles on penile schwannoma to get a comprehensive picture.
Lipomas are the most common benign soft tissue tumors and appear in any part of the body. They typically consist of mature adipose tissue. Osteolipoma is an extremely rare histologic variant of lipoma that contains mature lamellar bone within the tumor and osteolipoma independent of bone tissue are very rare. We report a case of histologically confirmed osteolipoma independent of bone located just above left knee. A 61 year old female presented with medial sided left knee pain of 6 month duration. X-ray demonstrated a partially calcified 3.5 cm diameter mass located in anterior to the distal medial femur. Histologic examination of an excisional biopsy showed the lesion to be an osteolipoma. Osteolipoma is a rare histologic variant of lipoma with osseous metaplasia, but should be considered in the differential of a fat-containing neoplasm with ossification.
Bednar tumor is a rare neoplasm of intermediate malignant potential, which account for less than 5% of dermatofibrosarcoma protuberans (DFSP).This tumor is a pigmented variant of DFSP. The diagnosis is commonly made in early to mid adult life except in cases with melanin containing cells. The case report presents a 19 years old female who presented with a painless slow-growing 3.5×3×1.2 cm blackish mass on the dorsal aspect of her right foot. Histopathological examination of the biopsy specimen revealed typical features of a Bednar tumor, the diagnosis was confirmed through immunohistochemical study.
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