histological grading is a good parameter to stratify tumors according to their biological aggressiveness. the elston and ellis grading method in humans, invasive ductal breast carcinomas and other invasive tumors are routinely used. the aims of this study were classification of mammary gland tumors and also application of a human grading method in canine mammary carcinoma. the samples included ...

neoplasms that arise in the salivary glands are relatively rare, yet they represent a wide variety of both benign and malignant histologic subtypes. approximately 70% of the salivary gland tumors affect parotid gland with the submandibular gland being affected in 5-10% of the cases, sublingual gland in 1% and minor glands in 5-15% of the cases. submandibular gland tumors are relatively rare and...

diagnosis of bone tumors is based on careful evaluation of clinical, imaging and a pathologic findings. so the biopsy of bone and soft tissue sarcomas is the final step in evaluation and a fundamental step in the diagnosis of the lesion. it should not be performed as a shortcut to diagnosis (1). the biopsy should be performed in order to confirm the diagnosis and differentiate among few diagnos...

background: gastrointestinal stromal tumors (gists) constitute the majority of gastrointestinal mesenchymal tumors. they usually express a proto-oncogen protein called cd117 detected by immunohistochemistry. this study investigated the differentiation of gists as well as the risk of aggressive behaviors in gists from surgically-treated patients in university affiliated hospitals.   methods: the...

primitive neuroectodermal tumors of the kidney are rare tumors representing about 1% of all sarcomas. extraskeletal primitive neuroectodermal tumors may be found in the genitourinary tract, the testes, ovaries, uterus, or pancreas. renal primitive neuroec- todermal tumors are frequently aggressive and almost 30% of all newly diagnosed cases present with distant metastases. surgical intervention...

objective: the aim of the present study was to estimate crude and age-standardized incidence rates for oral and pharyngeal nonsquamous cell malignant tumors in kerman province over a period of 11 years. materials and methods: the data used in this retrospective population-based study were extracted from the records registered in all pathology centers of kerman province from 1991 to 2001. all co...

human herpes virus 8 (hhv8) causes kaposi’s sarcoma, a common cancer among aids patients. it is proposed that this virus plays a role in formation of some blood vessel and lymphoma tumors. this study aimed to investigate the frequency of kshv among benign and malignant breast tumors. a total of 24 carcinomas and 24 fibroadenomas paraffin embedded tumoral tissue samples were obtained from the pa...

Chondromas are benign tumors that may be found in many parts of the body. Among intracranial neoplasms, tumors of cartilaginous origin are rare. It has been shown that most of these tumors arise from the skull base. Their occurrence in other parts of the intracranial cavity is unusual. Chondroma of falx is a rare neoplasm. In this report we introduce a case of falcine chondroma arose from front...

despite many advances in the field of cancer treatment, intra-cranial tumor cases still have a poor prognosis. this research has been carried out in order to describe age and sex distributions and histopathological characteristics and site of intra-cranial tumors. we studied 425 patients with intra-cranial tumor whose samples were examined in pathology center of imam khomeini hospital from 1991...