Synchronous Gastrointestinal Stromal Tumor and Axillary Deep Fibromatosis: A Rare Association

Gastrointestinal Stromal Tumor (GIST) is the most common mesenchymal tumor of the gastrointestinal tract and most commonly affects the stomach, while fibromatosis is a rare locally aggressive fibrous tissue neoplasm. There have been reports of GIST and fibromatosis occurring in same individual and in most of them fibromatosis occurs within the abdomen. In 75% of patients fibromatosis occurs after the diagnosis of GIST while in 20% it is seen synchronously. Here we report a case of axillary fibromatosis with synchronous GIST of the gastroesophageal junction in a 45-year-old male treated with surgery and now on adjuvant imatinib.