Fat-forming variant of solitary fibrous tumor found in falciform ligament: A case report

Introduction: the lipomatous variant of solitary fibrous tumor (sFt) is rare. Only six have been reported within the abdominopelvic region and this is the first reported within the falciform ligament. case report: A 41-yearold male presented with cramping epigastric pain and reflux. On examination an epigastric mass was palpable. He was investigated with a full blood count, liver and kidney function tests and electrolytes; which were all within normal limits. An ultrasound scan documented a mass just below his xiphisternum, beneath his linear alba, 61x48x31 mm in size, causing mild compression of the liver. this mass was further investigated with a computed tomography scan which confirmed a mass just below his xiphisternum. the lesion appeared vascular and differential diagnoses on imaging included a vascular malformation, hemangioma or vascular neoplasm. Intraoperatively a hard mass was excised from the distal portion of the falciform ligament. Histopathology of the lesion showed a circumscribed spindle cell neoplasm containing a significant amount of mature adipose tissue. the Marilla Jane Dickfos1,2, Lisa Squires3 Affiliations: 1MBBS BAppSci (Hons) General Surgery Principal House Officer, Department of General Surgery, The Prince Charles Hospital, Brisbane, Queensland, Australia; 2School of Medicine, the University of Queensland, Brisbane, Queensland, Australia; 3MBBS BAgrSc (Hons), Registrar, Department of Pathology, The Prince Charles Hospital, Brisbane, Queensland, Australia. Corresponding Author: Dr. Marilla Dickfos, The Prince Charles Hospital, 627 Rode Road, Chermside, Brisbane, Queensland, Australia; E-mail: [email protected] Received: 07 February 2016 Accepted: 26 May 2016 Published: 30 June 2016 morphology and immunoprofile were consistent with a sFt (lipomatous variant). conclusion: this case report describes a lipomatous variant of sFt in a previously undescribed location. these rare tumors can be difficult to diagnose and stAt6 immunoreactivity can be vital.