We describe a case with rapid relapse after resection of a sunitinib-resistant gastrointestinal stromal tumor (GIST). Liver metastases and foci of left retroperitoneal recurrence developed during adjuvant imatinib treatment. The tumors did not shrink after sunitinib treatment, and hepatectomy and retroperitoneal tumorectomy were performed. Histological examination showed a Ki67 labeling index o...

BACKGROUND To explore the feasibility and safety of retroperitoneal laparoscopic partial nephrectomy with sequential segmental renal artery clamping for the patients with multiple renal tumor of who have solitary kidney or contralateral kidney insufficiency. METHODS Nine patients who have undergone retroperitoneal laparoscopic partial nephrectomy with sequential segmental renal artery clampin...

A 58-year old male presented with a hard lump in lower abdomen extending into pelvis. Clinical examination and computed tomography scan revealed pelvic retroperitoneal mass. Patient underwent exploratory laparotomy - revealing a well encapsulated retroperitoneal mass extending up to coccyx, posterior to the urinary bladder. It had displaced the recto-sigmoid colon and urinary bladder to the rig...

Resection of retroperitoneal tumors is usually performed using the anterior retroperitoneal approach. Our report presents an innovative method utilizing a robotic surgical system. A 50-yr-old male patient visited our hospital due to a known paravertebral mass. Magnetic resonance imaging showed a well-encapsulated mass slightly abutting the abdominal aorta and left psoas muscle at the L4-L5 leve...

retroperitoneal lymph node biopsy which revealed no evidence of malignancy, but detected 4–5 mm tumor necrosis foci in some areas. The patient followed by three cycles of chemotherapy with bleomycin, etoposide, and cisplatin protocol. Follow-up CT after chemotherapy revealed that the para-aortic lymphadenopathies had decreased in size to 3.4 cm × 2 cm × 1.6 cm. The patient then underwent a retr...

Retroperitoneal schwannomas are quite rare tumors. Isolated renal hydatid cyst is also rare, and it forms 2-4% of hydatid disease. Because of their infrequent occurrence, nonspecific signs and symptoms, and lack of distinguishing radiologic features, we report herein a case of right retroperitoneal mass in a 26-year-old woman which was found to be benign schwannoma following a percutaneous core...

Experience with minimally invasive approaches, such as laparoscopic ablation and transanal endoscopic microsurgery, to resection pelvic retroperitoneal and presacral tumors is limited. Masses arising from this anatomic position are usually removed using a transsacral approach or laparotomy. We report a detailed description of the laparoscopic procedure performed in a 32-year-old woman to remove...

BACKGROUND Hepatocellular carcinoma (HCC) is a major cause of cancer-related mortality worldwide and the incidence is increasing as a result of growing hepatitis B and C virus infections. Primary clear cell carcinoma of the liver (PCCCL) is a rare subgroup of primary HCC, which has low metastatic potential and infrequently reported in literature. Retroperitoneal and intrahepatic metastasis of P...

Neuroblastoma is the most common extracranial solid tumor in childhood. In different classification of neuroblastomas, a subset of undifferentiated or poorly differentiated tumors with bizarre histological features has been mentioned. A 3-year-old girl presented with abdominal pain. Her haematological and biochemical parameters were normal except her urinary vanelylmandelic acid level was elevat...

Soft tissue sarcomas are a heterogenous group of rare tumors arising from embryonic mesoderm. Almost 15% of such sarcomas arise in the retroperitoneum. Rhabdomyosarcoma and fibrosarcoma are the two most common histologic variants in the retroperitoneum. The prognosis for patients with retroperitoneal sarcomas (RPS) is relatively poor characterized by late locoregional recurrence as principal ca...