abdominal mass is one of the commonest clinical findings in children. the purpose of this study was to evaluate abdominal masses in different age groups in a referral children surgical center. we retrospectively reviewed records of 325 patients (57% boys, mean age 37.7 months) admitted to amir kabir hospital in period of 12 years for abdominal mass surgery. the 4 most common abdominal masses wa...

introduction: salivary gland tumors are relatively rare and constitute 3-4% of all head and neck neoplasms. the majority (70%) of salivary gland tumors arise in the parotid gland. recommended treatment for a parotid mass is surgical excision with a surrounding cuff of normal tissue to prevent recurrence. materials and methods: this is a retrospective study of 300 patients who were operated by a...

Introduction: Vascular abnormalities are relatively uncommon lesions, but head and neck is a common region for vascular malformation which is classified as benign tumors. In this paper, the authors report a rare presentation of vascular malformation in the tongue and its managements. Case Report: An 18 months 2 old child presented with a giant mass of tongue which caused functional and aesth...

Left ventricular (LV) mass is a rare condition, of which the most common is thrombus. Echocardiography is a very useful modality of investigation to evaluate the LV mass. We are reporting a case of LV mass presenting with neurological symptom. The diagnosis of this mass was dilemma as the echocardiographic features were favoring tumor as well as thrombi. Mass (a) measuring 3.8 cm × 1.9 cm attac...

OBJECTIVE To investigate potential predictors of biochemical recurrence (BCR) in patients with localized prostate cancer with negative surgical resection margin (SRM). MATERIALS AND METHODS Data from 582 consecutive patients diagnosed with localized prostate cancer with negative SRM who underwent only radical prostatectomy between November 2003 and April 2010 were reviewed. Pathologic prostat...

There is a growing demand for surgical simulators to do fast and precise calculations of tissue deformation to simulate increasingly complex morphology in real-time. Unfortunately, even fast spring-mass based systems have slow convergence rates for large models. This paper presents a method to accelerate computation of a spring-mass system in order to simulate a complex organ such as the heart....

A study is presented of a miniature ultrasonic surgical drill designed for bone biopsy, based on an ultrasonic/sonic drill which converts high frequency to low frequency vibrations through a freely vibrating mass between an ultrasonic transducer-horn and a drill bit. For conventional surgical drilling using a rotary drill or an ultrasonic drill, considerable power is required to penetrate into ...

retrorectal tumors are rare lesions in adults, which remains a difficult diagnostic and management problem. the purpose of this study was to evaluate the results of surgical management of retrorectal tumors in our institution. in a retrospective study, a consecutive series of patients who underwent surgical excision of a retrorectal tumor were identified from a database. medical records, radiol...

meningioangiomatosis is regarded as a rare benign hamartomatous condition mostly involving the cerebral cortex and overlying leptomeninges. a strong association of ma with neurofibromatosis type 2 has been documented in published articles. herein we report a case of an otherwise healthy 13-year-old boy with no family history or stigmata of neurofibromatosis who presented with intractable seizur...