Fibrous Hamartoma of Infancy: A Case Report.

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.