Retroperitoneal E-GIST is a very rare tumor and a total of 58 cases have been reported in the literature (2). The distinction of E-GIST from gastrointestinal stromal tumors (GIST) is made by proving the origin outside the alimentary system and ruling out a concurrent neoplasm in the gastrointestinal tract. In this letter, we aimed to report a very rare form of E-GIST arising from the retroperit...

Primitive retroperitoneal tumors are formations with varying degrees of severity. They may occur locally, being impressive due to their generous diameters, but they can also invade the entire body. The latest genetic studies have somewhat changed the vision about the etiology of soft tissue tumors, while the immunohistochemical studies offer customized results on recurrence, metastasis and surv...

Retroperitoneal cystic lymphangiomas are rare tumors of the lymphatic system. These tumors usually present in childhood and are often diagnosed incidentally with imaging procedures. Although benign, they can grow to large sizes and become symptomatic due to their compressive effects. They can cause diagnostic dilemmas with other retroperitoneal cystic tumors including those arising from the liv...

Adrenal tumors are frequently incidental discoveries, and the therapy for them is the subject of controversial discussions. We report herein on such an incidentaloma, which proved to be a benign retroperitoneal schwannoma. A 48-year-old female with an unclear adrenal mass underwent retroperitoneoscopic tumor extirpation. A well-defined tumor that displaced the adrenal gland and adhered firmly t...

Paragangliomas are extra-adrenal tumors of the autonomic nervous system and may be found within the skull base, neck, chest, and abdomen. When presenting within the abdominal cavity, they may arise as a primary retroperitoneal neoplasm and can mimic vascular malformations or other conditions related to specific retroperitoneal organs such as the pancreas, kidneys, or adrenals. Retroperitoneal p...

We report a case of retroperitoneal schwannoma mimicking lymph node metastasis. A 32-year-old man presented with an intrascrotal mass, and underwent radical orchiectomy. Histological examination revealed a typical seminoma of the testis. Systemic work-up for staging demonstrated a retroperitoneal mass, which was located in the supra-hilar inter-aortocaval region. Under the diagnosis of retroper...

PURPOSE Retroperitoneal neural tumor (RNT) is rarely excised laparoscopically, and the laparoscopic management of RNT remains controversial. We herein report 4 cases of laparoscopic excision of RNT that resulted in diverse clinical outcomes. PATIENTS AND METHODS Between August 2005 and January 2011, we performed laparoscopic excision of RNT in 4 patients. The mean tumor size was 4.5 cm. The m...

A case of 49-year-old woman with a retroperitoneal undifferentiated foregut cyst attached to the right adrenal gland is reported. The bronchogenic cyst is a type of foregut cyst with a cartilage component, but in this case the multicystic tumor lacked both cartilage and gland. It is quite rare among retroperitoneal tumors and has not been reported so far to have malignant potential. The preoper...