Lipoblastoma of thigh in an adult: A rare case report

Abstract

Background: Lipoblastoma is a rare benign tumor that develops from embryonic adipose tissue cells. It's exceptionally rare in children and more so in adults. It's evoked on MRI criteria and histology does the confirmation. The main differential diagnoses are myxoid and well-limited liposarcoma, whose treatment and prognosis are different. Surgical excision is the treatment of choice, and the risk of recurrence is very rare. Case report: A 27-year-old patient with no particular pathological history. Presenting a 70mm ​× ​25mm, painless, well-limited, and mobile swelling of the inner face of the right thigh. Ultrasound showed a well-limited, hyper-echoic mass, containing hypoechoic zones suggesting a lipoma with signs of atypia. The MRI objectified a fatty formation with septa, suggesting a sarcomatous nature. The patient underwent a complete resection of the mass. A histopathological study revealed a lipoblastoma. Conclusion: Lipoblastoma is an exceptionally benign tumor in adulthood. The main differential diagnoses are myxoid and well-differentiated lipoblastomas, hence the importance of a meticulous radiological and histological study.