Objective(s): This study aimed to evaluate the role of pretreatment SUVmax and volumetric FDG positron emission tomography (PET) parameters in the differentiation between benign and malignant mediastinal tumors. In addition, we investigated whether pretreatment SUVmax and volumetric FDG-PET parameters could distinguish thymomas from thymic carcinomas, and low-risk from high-risk thymomas.Method...

BACKGROUND Gastrointestinal stromal tumors are the most common mesenchymal neoplasms of the human gastrointestinal tract. OBJECTIVES To review our accumulated experience using surgery to treat gastrointestinal stromal tumors. METHODS We reviewed all patient charts and histological diagnoses of leiomyomas, leiomyosarcomas, leiomyoblastomas and schwannomas. Only tumors that displayed c-kit (C...

Malignant mesenchymoma is combined soft tissue tumors of mesenchymal origin. Cutaneous combined sarcomas are exceedingly rare. We report the case of an 81-year-old woman who presented a left cutaneous mass. She underwent a wide local excision. Histopathological and immunohistochemical studies were consistent with the diagnosis of combined pleomorphic liposarcoma and conventional osteosarcoma (m...

Soft tissue sarcomas are malignant extraskeletal tumors of mesenchymal origin and uncommon in children.1,2 Rhabdomyosarcoma is most common and constitutes about 10 to 15% of the malignant neoplasms affecting children. The tumor is located with a high incidence in the head and neck region followed by the extremities and perineal region. We recently encountered one such interesting case of intrao...

Dr. Leonardo C. Welling – Rua Sacadura Cabral 178 Hospital dos Servidores do Estado RJ / Serviço de Neurocirurgia / 7° andar 20221-161 Rio de Janeiro RJ Brasil. E-mail: [email protected] Various orbital pathological process can cause unilateral proptosis, these include a variety of neoplastic and non-neoplastic lesions. The most common cause of unilateral and bilateral proptosis is G...

objective(s): this study aimed to evaluate the role of pretreatment suvmax and volumetric fdg positron emission tomography (pet) parameters in the differentiation between benign and malignant mediastinal tumors. in addition, we investigated whether pretreatment suvmax and volumetric fdg-pet parameters could distinguish thymomas from thymic carcinomas, and low-risk from high-risk thymomas.method...

BACKGROUND Mesenchymal malignancies of salivary origin are rare and are histologically diverse. We reviewed our experience with these tumors, as well as the published literature, with an emphasis on treatment modalities and prognosis. METHODS We identified 17 patients treated for malignant mesenchymal cell tumors at The University of Texas MD Anderson Cancer Center between 1990 and 2007. We c...

Pulmonary chondroid hamartomas (PCH) are biphasic benign tu mors that contain both mesenchymal and epithelial populations. In this report we describe two PCH in which clonal translocations at chromo some band 6p21 were demonstrated in mesenchymal cells. One of these had a unique translocation, t(6;14Xp21;q24), that was also found in one of two PCH karyotyped previously. The t(6;14) has not been...