INTRODUCTION The rare variant of renal epithelioid/pleomorphic angiomyolipoma has been reported in approximately 120 cases. One of the most important characteristics to differentiate these tumors from other renal cell neoplasms is their typical reactivity to premelanosome antigens. If such a tumor does not stain for HMB-45 or Melan-A, a specific diagnosis of epithelioid pleomorphic angiomyolipo...

background and aims. various morphologies are seen in different salivary gland tumorsor within an individual tumor, and the lesions show divers biological behaviors. experimental results support the hypothesis that increased crkii proto-oncogene is associated with cytokine-induced tumor initiation and progression by altering cell motility signaling pathway. the aim of this study was to assess t...

The morphology, incidence and distribution of hyaline cells in ten cases each of pleomorphic adenoma, adenoid cystic carcinoma, adenocarcinoma and mucoepidermoid tumour were studied by conventional light microscopy. Results showed that the hyaline cells were identified in 60% of pleomorphic adenoma and in 20% of mucoepidermoid tumours, but were absent in adenoid cystic carcinoma and adenocarcin...

Introduction. Although pleomorphic adenoma is the most common neoplasm of the salivary glands, this tumor most commonly involves the minor salivary glands of palatal and rarely occurs in cervical region. Case Report. A 21-year-old female referred to our clinic due to painless mass of right upper region of neck. After paraclinical and pathologic evaluation, it was diagnosed as cervical pleomorph...

Pleomorphic adenoma is the most common form of major salivary gland tumors,but it is exceedingly rare in the trachea. We present a case of pleomorphic adenoma of the trachea in an 80-years-old man. Chest three-dimensional CT demonstrated a bosselated mass with a lobulated surface arising from the membranous portion of the upper trachea. Transbronchoscopic biopsy from the mass showed a biphasic ...

Among all neoplasms affecting head and neck region, salivary gland neoplasms are rare. Pleomorphic adenomas are the most common benign salivary gland tumours making up to 50% of major and minor salivary gland tumours. Intraorally pleomorphic adenoma is mostly found on palate and lips and very rarely in retromolar area. Here we are reporting a rare case of pleomorphic adenoma in right lower retr...

Background: Mucoepidermoid carcinoma ex-pleomorphic adenoma (MECxPA) is an extremely rare salivary gland malignancy. With only nine prior reported cases, this entity represents a challenging histopathological diagnosis. Methods: We present a case of a 71-year-old male with an enlarging left neck mass over several months. CT showed both a parapharyngeal space mass and a separate level II neck ma...

he pleomorphic adenoma otherwise called as benign mixed tumor, is the most common salivary neoplasm. 1 It accounts for 53% to 77% of parotid tumors, 44% to 68% of submandibular tumours and 33% to 43% of minor gland tumors. 2 Pleomorphic adenomas are derived from a mixture of ductal and myoepithelial elements. 2,3 The terms pleomorphic adenoma and mixed tumor both represent attempts to describe ...

Mammary mixed tumours are the most frequent neoplasias in female dogs. In humans, mixed tumours are frequently found in the salivary glands and are known as pleomorphic adenomas. In addition to their histomorphologic similarities, mixed tumours and pleomorphic adenomas have the potential to become malignant and give rise to carcinomas in mixed tumours and carcinomas ex-pleomorphic adenoma, resp...

Tyrosine crystals were seen in 24 of 113 salivary gland pleomorphic adenomas from Malawi and one of six carcinomas arising in a pleomorphic adenoma; they were present in tumours from all common anatomical sites. They were not found in 71 other salivary tumours of varying histological type. Similar crystals were found in one out of 56 pleomorphic adenomas from patients operated on at St Thomas's...