background: malignant neoplasms remain the second leading cause of death in children after accidents. the aim of this study was to assess the epidemiology of childhood cancer in children admitted to dr sheikh hospital, iran. materials and methods: this descriptive cross- sectional study had been done in dr sheikh hospital in mashhad university of medical science on 1764 children younger than 14...

Epithelioid hemangioendothelioma is a vascular tumor with an intermediate malignant potential. This tumor is very rare in the lung parenchyma, and most of the previously reported cases have been asymptomatic. There is no standard therapy for this tumor and prognosis in the previous reports has been variable.Herein we report our experience with a 60-year-old woman presenting with hemoptysis and ...

We present a case of recurrent extensive malignant fibrous histiocytoma of maxilla. The case is unusual because of its massive extent at presentation even after primary surgery and full course of radiotherapy and chemotherapy. Even such massive tumor can be excised successfully. Primary malignant histiocytoma is rare; and such huge tumor at presentation is also rare and favorable outcome even

Malignant struma ovarii is a rare form of ovarian carcinoma; only 3 cases of its pure papillary type have been reported in the literature. A new case of malignant papillary struma ovarii arising in an asymptomatic 32-year-old woman is presented. Due to its rarity, there has been confusion in the diagnosis and management of malignant struma ovarii. Criteria for the diagnosis of malignant papilla...

primary pancreatic leiomyosarcomas are rare malignant neoplasms with an aggressive course and a large size. a 56-year-old woman presented with an 8-year history of abdominal pain. multislice computed tomography revealed a large heterogeneous mass with necrotic, calcified and macroscopic fatty areas. the tumor was excised. histopathological evaluation revealed leiomyosarcoma of the pancreas. if ...

epithelioid hemangioendothelioma is a vascular tumor with an intermediate malignant potential. this tumor is very rare in the lung parenchyma, and most of the previously reported cases have been asymptomatic. there is no standard therapy for this tumor and prognosis in the previous reports has been variable. herein we report our experience with a 60-year-old woman presenting with hemoptysis and...

Primary oral malignant melanoma is a rare tumor, which is estimated to comprise 0.2-8.0% of all melanoma cases. This type of cancer is fairly uncommon, its prognosis is dismal, and it frequently exhibits a biologically aggressive behavior. The common location of primary oral malignant melanoma is the hard palate and maxillary alveolus. In ~85% of cases, the melanoma will metastasize to the live...

OBJECTIVES/HYPOTHESIS To report on the clinical course and management of sinonasal paragangliomas (PGLs). STUDY DESIGN AND METHODS Retrospective chart review of six patients with PGLs of the nasal cavity and paranasal sinuses. RESULTS Three patients had tumors with malignant clinical behavior with cerebral metastases or infiltration of brain and local recurrence, despite surgery and/or radi...