# Fibrous Hamartoma of Infancy: A Case Report

## TL;DR

This case report describes a rare benign tumor in a one-year-old boy, diagnosed with MRI and successfully treated with surgery.

## Contribution

The paper adds a new clinical case of fibrous hamartoma of infancy with detailed diagnostic and treatment outcomes.

## Key findings

- MRI is effective in diagnosing fibrous hamartoma of infancy without malignant features.
- Local excision is a safe and effective treatment for fibrous hamartoma of infancy.

## Abstract

Fibrous hamartoma of infancy (FHI) is a rare, benign soft tissue tumor usually seen in the pediatric population under two years of age. The most usual localizations are the axilla, extremities, urogenital area, and abdomen. CT and MRI play an important role in determining the origins and analyzing the surrounding structures. The first-line treatment in FHI is local excision. A one-year-old male infant presented with swelling of the right wrist. On examination, the mass was solid, mobile, measuring 5 × 4 cm, and located in the soft tissue of the right wrist. Ultrasound was performed and showed a heterogeneous, poorly circumscribed swelling. MRI demonstrated no malignant features. A biopsy was performed, and pathological examination with immunochemistry showed FHI. The lesion was treated by marginal excision, and no complications were noted postoperatively. FHI presents as a slow-growing soft tissue swelling seen under the age of two years. MRI is the best examination to guide the diagnosis. Local excision is the most effective treatment.