Angiomatoid Fibrous Histiocytoma in the Forearm: A Case Report

Abstract

Background: Angiomatoid fibrous histiocytoma [AFH] is a rare soft tissue tumor most commonly occurring in children, adolescents, and young adults. It is considered to be a tumor of intermediate malignancy because of its less aggressive course. The extremities are the most common site of involvement, followed by the trunk and head and neck. Case presentation: A 28-Year-old male presented with a right forearm mass that has been present for 2 years. There was no associated fever, no trauma, no night pain and no constitutional symptoms. On examination he had a forearm mass dorsally measuring 2x3 cm, firm, rounded, mobile with no skin changes and full range motion joint above and joint below. Lab and imaging studies done which showed soft tissue mass, multilobulated complex heterogeneous with increased vascularity. Patient underwent biopsy and surgical excision. Conclusion: Angiomatoid fibrous histiocytoma is a neoplasm of intermediate biologic potential. Most often, the extremities are the most common site of involvement, followed by the trunk and head and neck of children and young adults. Its rarity may lead to misdiagnosis as either a reactive lesion or a benign or higher-grade tumor. This tumor has a relatively rare metastasis and its overall clinical outcome is excellent. It is clinically important to accurately diagnose this tumor so that wide local excision may be performed and patients may be appropriately monitored and followed up.