granular cell tumor is a rare benign neoplasm most commonly appears in the head and neck region, especially in the tongue, cheek mucosa, and palate. occurrence in limbs is even rarer. these tumors account for approximately 0.5% of all soft tissue tumors. granular cell tumor can also affect other organs including skin, breast, and lungs. local recurrence and metastasis is potentially higher in m...

osteosarcoma (osteogenic sarcoma: os) is the most common primary malignant bone tumor of long bones, whereas primary osteosarcoma of chest wall, especially in sternum, is extremely rare. we report a 57-year-old man with an immobile slow growing mass located in the middle of the sternum. the patient had no significant pain or tenderness and the past medical history was not remarkable. ct-scan sh...

gastrointestinal stromal tumors (gist) are the most common mesenchy­mal tumors of the gastrointestinal tract. the biological pattern of these tumors ranges from benign-appearing small lesions to malignant sarcomas. only 3%-5% of gists are found in the duodenum. a duodenal gist is a rare source of upper gastrointestinal bleeding. a remarkable percentage of duodenal gists are localized in the thi...

introduction giant fibroadenoma is a rare disease with unknown etiology. during pregnancy, fibroadenomas increase in size and may show lactational histologic changes. high concentrations of estrogen, progesterone, and prolactin promote the ductal growth and formation of tubuloalveolar structures. this may be a reason for the significant enlargement in this period. case presentation we presented...

primary rhabdomyosarcoma (rms) of the kidney is a rare malignant mesenchymal tumor with an aggressive clinical course. adult renal rms is typically a pleomorphic histologic subtype and only a few cases have ever been reported. we herein present a new case of renal rms of the embryonal histologic subtype in a 26-year-old woman.

desmoid tumor of breast is a rare benign, locally aggressive tumor with a high recurrence rate. it has been associated with scar from previous breast surgery or trauma. especially in breast cancer patients with previous operation history, it may simulate recurrent breast cancer clinically and radiologically. we presented multimodality imaging findings (ultrasound, computed tomography, magnetic ...

objective(s): considering the fact that the standardized uptake value (suv) of a normal lung tissue is expressed as x±sd, x+3×sd could be considered as the threshold value to outline the internal tumor volume (itv) of a lung neoplasm. methods: three hollow models were filled with 55.0 kbq/ml fluorine18- fluorodeoxyglucose (18f-fdg) to represent tumors. the models were fixed to a barrel filled w...

p53 and pcna expression in keratocystic odontogenic tumors compared with selected odontogenic cysts summary: the aim of this study was to evaluate p53 and pcna expression in different odontogenic lesions regarding their different clinical behaviors. slices prepared from 94 paraffin-embedded tissue blocks (25 radicular cysts (rc), 23 dentigerous cysts (dc), 23 keratocystic odontogenic tumors (kc...

background: to determine which radiotherapy parameters are associated with the tumor response of locally advanced non-small cell lung cancer (nsclc) patients undergoing concurrent chemoradiotherapy. materials and methods: thirty one patients with iiia/iiib nsclc underwent chemoradiotherapy with a median dose of 63 gy. on our actual treatments, we made radiotherapy planning to cover the planning...