objective: sarcomas are neoplasms of mesenchymal (stem cell) origin and are rare skin diseases of cats and may occur anywhere on the cat body.the main etiologies of soft tissue sarcomas are feline sarcoma virus induced sarcomas, vaccine site sarcomas, trauma, inflammation and radiation. methods: in march 2014, a three years old male domestic shorthair cat were referred to a private veterinary c...

background: neuroblastoma is the most common tumor in infancy and wilms’ tumor is the most common malignant tumor of kidney in childhood. both the tumors are usually within the differential diagnosis of each other. this study compares the clinical manifestations, sex and age distribution of childhood wilms’ tumor and neuroblastoma at one of tehran children hospitals. materials and methods: the ...

abstract gastrointestinal mesenchymal tumors are a group of tumors originating from the mesenchymal stem cells of the gi tract. digestive tract schwannomas are rare mesenchymal tumors which occur most frequently in the stomach. we report a 56-yearold woman who was examined endoscopically for dyspepsia which she had suffered from since 3 years ago. around gastric antral mass was seen. surgical r...

Objectives: Multidrug resistance (MDR), which may be due to the over expression of P-glycoprotein (Pgp) and/or MRP, is a major problem in neoadjuvant chemotherapy of osteosarcoma. The aim of this study was to investigate the role of Tc-99m MIBI scan for predicting the response to pre-operative chemotherapy. Materials and Methods: Twenty-five patients (12 males and 13 females, aged between 8 and...

Introduction: Radiation therapy is an important procedure for treatment of more than half of tumors. One way to increase the efficiency of radiation therapy is application of radiosensitizer at the site of tumor. gold nanoparticles (GNPs) have several characteristics that make them attractive for using with radiation therapy including small size (1–100 nm), biocompatibility, pr...

Objective: Patella is a sesamoid bone which develops in the quadriceps tendon. It is an uncommon site for neoplasms. The most common primary tumors which involve patella are benign. These include chondroblastoma, giant cell tumor (GCT) and aneurysmal bone cyst. Malignant lesions are less common in patella. These encompass metastasis, osteosarcoma and hemangioendothelioma. The most common compla...

schwannoma is a solitary, slow growing,  benign tumour of the peripheral  nerve sheath, and it is most common locations are the head, neck, the flexor surfaces of the extremities, retroperitoneal and posterior mediastinium. external female genital organs are the least common location site of the schwannoma. only a few cases of vulvar schwannoma have been reported.we report 65 year- old woman pr...

Diffuse type tenosynovial giant cell tumor (D-TGCT) is a locally aggressive benign proliferation. Knee joint the most commonly affected site. We present case report with 16 months follow up after recurrent surgery and postoperative radiotherapy.