Myoepithelial carcinomas are quite infrequent neoplasms and coupled with their diverse morphological appearance are interesting as far as diagnosis and management is concerned. They account for less than 1% of all salivary gland tumors. The variable morphologic appearance of myoepithelial carcinoma leads to a wide differential diagnosis, including primary salivary gland tumors and metastatic tu...

Introduction: Myoepithelial carcinomas are rare malignant neoplasms, which known to arise from the salivary glands or other organs. Case Presentation: Here, we present a case of myoepithelial carcinoma in 64-year-old woman, presenting clinic with painful ankle mass for past three years. Ultrasonography showed 1 cm, iso- hypoechoic on medial malleolus right ankle. Magnetic resonance imaging (MRI...

Low-grade cribriform cystadenocarcinoma (LGCCC) is a rare salivary gland tumor that was recently defined as a variant of cystadenocarcinoma by the 2005 World Health Orgazniation (WHO) classification system. We report cytologic findings of an unusual case of LGCCC with many psammoma bodies. A 90-year-old man presented a palpable mass on his left parotid gland. Fine-needle aspiration (FNA) cytolo...

Phyllodes tumor is an uncommon fibroepithelial neoplasm of the breast. And it is characterized by expanded stroma with increased cellularity and elongated epithelium-lined clefts. Mammary carcinomas within phyllodes tumors have been rarely reported. To date, however, no reports have described the invasive cribriform carcinoma arising in malignant phyllodes tumor. Here, we report a 62-year-old w...

In this article, we described a malignant myoepithelioma of the breast (MMB) in a 69-year-old woman. Breast cancer derived from myoepithelial cells is very rare, usually benign. The diagnosis of MMB based on histological and immunohistochemical finding. In this case, the author diagnosed the tumor as MMB, because tumor tissues were immunopositive for 34βE12, P63, SMA, S-100, CD10, E-Cad and Ki-...

Hormone dependency of the N-nitrosomethylurea-induced mammary tumor in rats has been demonstrated by ovariectomy. Tumors showing a clear reduction in size in response to ovariectomy have been used in an ultrastructural study. Histologically, the tumor is an adenocarcinoma. The multilayered tumor parenchyma contains myoepithelial cells and highly and less-well-differentiated cells. The adluminal...

A case of epithelial myoepithelial tumour originating from the tracheal gland in a 57 year old woman is described. The tumour was removed by segmental tracheal resection and end-to-end anastomosis. Histologically, the tumour comprised clear cells and presented a monophasic pattern. Immunohistochemical analysis showed that the tumour cells were positive for both S-100 protein and smooth muscle a...

AIMS To assess the value of the calcium dependent cell adhesion molecule P-cadherin as a myoepithelial marker in the differential diagnosis of benign and malignant breast lesions. METHODS Immunohistochemical analysis of normal breast, sclerotic breast lesions, tubular carcinomas, and ductal carcinoma in situ using a P-cadherin specific antibody and comparison with smooth muscle actin. RESUL...

Partial myoepithelial differentiation is common in simple epithelial hyperplasia (epitheliosis) of the breast but functional myoepithelial differentiation with basement membrane production is exceedingly rare. A peculiar change of hyaline globules within benign epithelial hyperplasia has been recognised before as "collagenous spherulosis" and type IV collagen has been shown by immunohistochemis...