Retroperitoneal schwanoma presenting as deep venous thrombosis

Schwannoma is a slow growing painless, benign neoplasm originating from schwanian cells of peripheral nerve sheath. A 67 years old female patient was admitted to Taif armed forces hospital complaining of left lower limb pain and swelling. The patient was provisionally diagnosed to have left lower limb deep venous thrombosis. Doppler lower limb ultrasound revealed an intra-abdominal mass of ovarian origin. Magnetic Resonant Image (MRI) of the pelvis was performed and showed a retroperitoneal large pelvic mass measuring 17 × 13 cm in the largest diameter which was well marginated.