# Case Report: Bowel obstruction caused by an adult fibrosarcoma located in the pelvis

## TL;DR

A rare case of adult fibrosarcoma in the pelvis causing bowel obstruction is reported, highlighting the need for awareness and early diagnosis of such tumors.

## Contribution

This paper presents a rare clinical case of primary pelvic adult fibrosarcoma and emphasizes the importance of early detection and multidisciplinary management.

## Key findings

- A 52-year-old male presented with bowel obstruction caused by a primary pelvic fibrosarcoma.
- Imaging and histopathology confirmed the diagnosis of adult fibrosarcoma.
- The case highlights the importance of considering rare sarcomas in unexplained abdominal symptoms.

## Abstract

Adult fibrosarcoma (FS) is a rare subtype of soft tissue sarcoma (STS). These tumors most commonly occur in the extremities and present as painless, enlarging masses; primary FS arising whin the abdominal cavity or pelvis represents an exceptionally uncommon entity, with limited documented cases.

We report a case of primary pelvic adult FS in a 52-year-old male who presented with persistent abdominal pain and bowel obstruction. Abdominal Computed Tomography (CT) revealed a large, round, mixed-density mass occupying the pelvis, with suspected involvement of adjacent organs. Final histopathological diagnosis of adult FS was confirmed following comprehensive immunohistochemical workup.

This case dramatically underscores the critical importance for gastrointestinal surgeons and oncologists to maintain awareness of rare STS like FS in patients presenting with unexplained abdominal symptoms or obstruction. Early recognition, facilitated by advanced imaging and meticulous pathology, and the multidisciplinary management strategy are paramount to optimizing outcomes in these diagnostically challenging and aggressive tumors.