Myopericytoma is a soft tissue tumor with perivascular myoid differentiation. It accounts for 1% of the vascular tumors and involves mostly cutaneous or subcutaneous tissue of the limbs in adults. Malignant myopericytoma is exceedingly rare. A 15-year old girl presented with slowly progressive mass over left shoulder region. Histopathology and immunohistochemistry after complete excision reveal...

Glomus tumors are uncommon benign perivascular neoplasms that have rarely been described outside of their usual peripheral soft tissue sites. We report a unique case of glomus tumor of the renal pelvis in a 53-year-old woman who presented with microscopic hematuria associated with obstruction of the ureteropelvic junction and marked hydronephrosis. At initial gross examination, the tumor mimick...

Perivascular epithelioid cell neoplasms (PEComa) are rare mesenchymal tumors that can occur in any part of the body and have unpredictable pathological behavior. They are usually benign, but may be malignant. We present a case of malignant PEComa of the pelvic retroperitoneum treated with radical surgery.

Between 1994 and 2012, chest wall resection and reconstruction were performed 15 patients (16 cases) with primary chest wall tumors, metastatic tumors. and chest wall recurrence of breast carcinoma. In all the patients, reconstruction of the chest wall was performed using layers of polypropylene Marlex mesh sheets. In 9 patients, only Marlex mesh sheets were used. The post-operative course was ...

OBJECTIVE To describe the computed tomography (CT) features of neuroendocrine tumors (NETs) and solid pseudopapillary tumors (SPTs) with unilocular cyst-like appearance, and to compare them with those of unilocular cystic tumors of the pancreas. MATERIALS AND METHODS This retrospective study was approved by our Institutional Review Board, and informed consent was waived. We included 112 pancr...

Changes in the structure of the artery wall commence shortly after exposure to cardiovascular risk factors, such as hypercholesterolemia (HC), but may be difficult to detect. The ability to study vascular wall structure could be helpful in evaluation of the factors that instigate atherosclerosis and its pathomechanisms. The present study tested the hypothesis that early morphological changes in...

background: tumors involving the hand skeleton are rare. however, a basic knowledge of hand tumors is necessary for every clinician. this is due to the importance of distinguishing typical benign tumors from life or limb threatening malignant ones. methods: this study is a review of 99 cases of osseous hand tumors presented to the department of orthopedic surgery, imam khomeini hospital in tehr...

Perivascular adipose tissue (PVAT) and its adipokines engage in bidirectional crosstalk with the vascular wall. Atherosclerosis disrupts this interaction through inflammation, rupture-prone plaques, subsequent thrombosis. The cardioprotective effects of ghrelin are contradiction to adipogenic properties. concurrent research anti-/pro-atherogenic mechanisms PVAT-derived provides a better underst...