# Perifascial Nodular Fasciitis Adjacent to the Tensor Fasciae Latae: Ultrasound and MRI Findings in a Rare Hip Presentation

## TL;DR

A rare case of a benign hip tumor was correctly diagnosed using ultrasound and MRI, preventing unnecessary treatment.

## Contribution

This case report adds to the understanding of nodular fasciitis in an uncommon hip location and emphasizes the importance of imaging-pathology correlation.

## Key findings

- Ultrasound and MRI effectively localized and characterized a perifascial nodular fasciitis lesion near the hip.
- Histological analysis confirmed the diagnosis of nodular fasciitis, avoiding misdiagnosis as a sarcoma.
- The case underscores the importance of combining imaging with pathology to guide treatment decisions.

## Abstract

Nodular fasciitis is a benign, self-limited myofibroblastic proliferation that can mimic soft-tissue sarcoma because of rapid growth. It most often affects the upper extremities, while presentation around the hip remains uncommon. We report a 29-year-old woman who noticed a recently appearing, painless lateral hip mass that prompted medical consultation. Ultrasound and magnetic resonance imaging helped localize and characterize the lesion and guided biopsy. Histology confirmed nodular fasciitis. This case highlights the value of imaging-pathology correlation in recognizing this benign entity and avoiding unnecessary aggressive treatment.