Schwannomas are uncommon benign neoplasms arising from the Schwann cells lining the nerve sheath. Retroperitoneal schwannomas are extremely rare constituting about 0.3‐3.2% of all retroperitoneal masses. Pancreatic schwannomas are obsolete and less than 50 cases reported until date in the literature. Ancient schwannomas is a histological variety in which there would be degenerative changes occu...

BACKGROUND The diagnosis of gastrointestinal stromal tumors is based on documentation of c-KIT and platelet-derived growth factor-alpha receptors or specific c-KIT mutations. Before the diagnosis of GIST was possible, all cases had been classified as sarcomas or benign tumors. OBJECTIVES To identify cases of GIST formerly diagnosed as abdominal or retroperitoneal mesenchymal tumors. METHODS...

OBJECTIVE To describe the clinical features, surgical and histologic findings, biological behavior, and outcome of dogs with retroperitoneal sarcomas. DESIGN Retrospective study. ANIMALS 14 dogs. PROCEDURES Medical and pathology records from 1992 to 2002 of dogs with tumors originating in the retroperitoneal space were reviewed. Dogs with retroperitoneal tumors originating from the adrena...

A twenty-five-year-old female presented with a large retroperitoneal mass. Workup included history and physical exam, imaging, biopsy, colonoscopy, and gynecologic exam. After surgical resection, the mass was determined to be a primary retroperitoneal mucinous tumor (PRMT). Clinically and histologically, these tumors are similar pancreatic and ovarian mucinous neoplasms. PRMTs are rare and few ...

Primary retroperitoneal mucinous tumors are rare neoplasms and almost exclusively seen in women. In this case report we present two cases of this entity with their clinicopathologic features. The first patient was a 32 years old unmarried woman presented with abdominal pain. Ultrasound imaging demonstrated a solid and thick walled ovarian mass m. 105* 70*80 mm. At laparotomy a large retroperito...

Germ cell tumors (GCTs) occur generally in the testes or ovaries. Extra-gonadal location of GCTs is very rare .Extra-gonadal GCTs usually arise from midline structures, the commonest sites being the retroperitoneal and mediastinum. Gastrointestinal germ cell tumors are very uncommon. The etiology, prognosis and clinical course of gastrointestinal GCTs are not well understood yet. Weherein prese...

BACKGROUND Retroperitoneal sarcomas are rare neoplasms that often present with multivisceral involvement. Treatment for these tumors requires careful decision making requiring a combination of surgery, chemotherapy, and radiation therapy. METHODS We reviewed the scientific literature pertaining to the diagnosis and management of retroperitoneal sarcomas. We also identify recent developments i...

BACKGROUND Laparoscopic resection of primary retroperitoneal tumors is a challenging procedure because access is difficult due to the deep, posterior location and adjacent major vessels. OBJECTIVE To assess the safety and feasibility of laparoscopic resection of primary nonadrenal retroperitoneal tumors. Method  Data on 20 patients with a diagnosis of primary retroperitoneal tumor who underwe...