Case history

ABSTRACT

A 38-year-old female presented with a 2-month history of left sided, painless, slowly growing abdominal mass. She denied any past surgery and estrogen intake. The patient had normal vital signs. Her abdominal examination revealed a non-tender, firm, and immobile mass in the lumbar area [Figure 1]. Her CT scan is shown in Figure 2. She underwent laparatomy and the mass was excised [Figure 3]. The histological report demonstrated a tumor composed of stellate and spindle cells arranged in a storiform pattern. [Figure 4]. What is the most probable diagnosis?