Primary urethral malignant melanoma is an extremely rare malignancy with early metastasis and often delayed diagnosis, resulted in poor prognosis. Literature on this entity, especially with regard to urinary cytology ...
Perivascular epithelioid cell tumor(PEComa) of the pancreas is an unusual tumor deriving from mesenchyma. This paper described a case of pancreatic PEComa, which was initially suspected as neuroendocrine carcinoma by ...
Primary malignant melanoma originating in the colon is an extremely rare disease.Herein,we report a case of primary melanoma of the ascending colon.The patient was a 57-year-old male who was admitted to our hospital f...