J Cancer Sci Clin Ther 2017; 1 (1): 001-005 DOI: 10.26502/jcsct.5079001 Journal of Cancer Science and Clinical Therapeutics 1 Case Report Solitary Fibrous Tumour of Pelvic Soft Tissue Mimicking A Prostatic Mass: Diagnosis and Management Keval N Patel * and Shashank J Pandya Department of Surgical Oncology, The Gujarat Cancer Research Institute, Ahmedabad, Gujarat, India * Corresponding Author: Keval N Patel, Department of Surgical Oncology, The Gujarat Cancer Research Institute, Ahmedabad, Gujarat, India, Tel: +919427052870; E-mail: drkevalpatel@yahoo.com Received: 10 October 2017; Accepted: 13 November 2017; Published: 16 November 2017 Abstract Solitary fibrous tumor (SFT) is a rare soft tissue tumor occurring rarely in extrapleural sites like the pelvis. We here present a case of SFT of the pelvis which was initially diagnosed radiologically as a mass arising from prostate and on biopsy found to be a solitary fibrous tumor. On exploration, there was a well encapsulated tumor in retro-vesical space separate from prostate. Histopathology with Immuno-histochemistry confirmed the diagnosis of SFT. We retrospectively reviewed the literature to avoid such confusion in future. Pubmed search was made with the following keywords: solitary fibrous tumor, treatment, soft tissue, pelvis, radiology, and histopathology. Keywords: Solitary fibrous tumor; Treatment; Soft tissue; Pelvis; Radiology; Histopathology 1. Introduction SFT is a rare soft tissue tumor and even rarer in pelvic soft tissue [1]. The knowledge of extraprostatic versus prostatic site of origin can avoid unnecessary cystoprostatectomy and its related morbidities especially when a tumor is large in size as it is very difficult to diagnose the site of origin based on available preoperative parameters. We retrospectively analyzed the factors which may lead to the diagnosis of the tumor site preoperatively and precautions to be taken during surgery if the site of origin is not known. 2. Case Description A 58 years old male patient presented with obstructive LUTS lasting for 3 months duration with increasing severity till he developed retention. On DRE there was grade III enlargement of prostate which was nodular, nontender with obliterated midline sulcus. His laboratory investigations were as follows: creatinine 1.0 mg/dl, PSA 0.8 ng/ml, urine culture showed no growth of organisms and LFT were within normal limits. CT scan of abdomen and pelvis showed