INTRODUCTION Retroperitoneal tumor is often seen in urology clinical practice. To diagnose the tumor, tumor specimens must be obtained. However, in some cases, the tumor is penetrated by vessels around the ureter, and it may be difficult to detect the optimal spot for obtaining a specimen, even when performing open surgery. CASE PRESENTATION A 53-year-old male patient was referred to our hosp...

Patient. A 65-year-old man was admitted with a large primary retroperitoneal tumor and an increased beta-human chorionic gonadotropin (beta-HCG) serum level. A germ cell tumor was suspected; however, a computed tomography-guided biopsy failed to enable tumor classification. After two courses of chemotherapy, the beta-HCG serum level had returned to the normal level and a diagnostic laparotomy w...

A huge retroperitoneal tumor with a right orbital mass was detected and proved to be an extragonadal nonseminomatous germ cell tumor on biopsy. BEP chemotherapy caused some regression in orbital mass however no change in retroperitoneal tumor size as well as serum tumor marker levels occurred. Herein, we present a rarely seen entity of extragonadal retroperitoneal nonseminomatous germ cell tumo...

Desmoid tumor is a rare soft tissue and accounts less than 1% of retroperitoneal tumor. It pathologically benign tumor, while clinical behavior aggressive, showing high rate local recurrence. consists spindle cell, collagen myxoid matrix thus it shows diverse imaging patterns according to its composition. In this case report, surgically diagnosed desmoid presented.

bronchogenic cysts are among developmental disorders of the primitive foregut which are typically found above the diaphragm. bronchial cysts discovered in the abdominal cavity or retroperitoneum are extremely rare. we present a rare case of a retroperitoneal bronchogenic cyst which was incidentally detected after a wrestling injury in a 23-year-old man who had a negative medical history. althou...

Primary retroperitoneal mucinous cystic tumors are extremely rare. These tumors can be classified as a primary retroperitoneal mucinous cystadenoma with or without borderline malignancy or primary retroperitoneal mucinous cystadenocarcinoma. The most common of these is primary retroperitoneal mucinous cystadenoma, which almost always occurs in female patients; only ten cases have been reported ...

Thymoma is an epithelial neoplasm of the thymus, which commonly lies in the anterior mediastinum and recurrences of thymoma generally are locally, and retroperitoneal recurrence is considered to be rare. A 46-year old Asian woman with invasive thymoma had undergone thymectomy 10 years ago. Computed tomography demonstrated a well-circumscribed mass in the left retroperitoneal space. The patient ...

BACKGROUND Retroperitoneal schwannomas are very rare and are usually found incidentally. CASES REPORT Two rare cases of retroperitoneal schwannomas are reported. Both were incidentally found during US scans for non-specific epigastric pain and were initially diagnosed as non-secreting retroperitoneal tumors. The diagnosis was confirmed by CT scan. In both patients the tumors were resected. Th...

We describe a rare case of a primary retroperitoneal ganglioneuroma that was found accidentally during preoperative examinations conducted due to a suspicion of ovarian cancer. Computerized tomography was not able to differentiate the retroperitoneal mass from an adrenal tumor. We diagnosed the retroperitoneal tumor by means of selective adrenal angiography.

Retroperitoneal tumors are lesions with diverse pathological subtypes that originate from the retroperitoneal space; ~40% of these tumors are benign. Due to such lesions often surrounding and associating with vital abdominal blood vessels, a complete surgical resection is difficult. The current study presents a novel surgical approach, known as fractionation, through which a benign retroperiton...