The authors report a case of a 24 year-old female patient with a three-month history of pain and enlargement of the left halux. Ultrasound showed a heterogeneous, hypoechoic solid soft tissue mass with cystic areas and calcification in the dorsum of the left halux. A tendinous structure was identified within the lesion but no evidence of involvement of adjacent osseous structures was found. Doppler ultrasound revealed central and peripheral hypervascularization of the lesion. Magnetic resonance imaging demonstrated a solid soft tissue mass containing a tendinous structure. The lesion appeared as an intermediate signal intensity structure on T1 images, high signal intensity on T2 images, and showed marked enhancement after intravenous administration of gadolinium. No osseous lesions were identified. The patient was submitted to surgical resection of the lesion in the dorsum of the left halux and the pathology results revealed a monophasic fibrous synovial sarcoma.

Keywords: Synovial sarcomas, Soft-tissue tumors, Ultra-sonography, Magnetic resonance imaging

The authors report a case of a 20-year-old patient with the following clinical features: a) complete rotation of the liver into the left upper quadrant; b) severe hypotension secondary to inferior vena cava compression; c) congenital malformation of falciform and coronary ligaments; d) obstruction of the transverse colon due to congenital peritoneal fibrotic bands; e) massive colonic dilatation in the right upper quadrant. The patient was treated by resection of the pericolonic bands, and during the operation the liver returned to its anatomic position, in the right upper abdomen. This unique condition, and the three other similar cases reported in the world literature are discussed.

Keywords: Hepatic torsion. Transverse colon. Obstructive band.