The abdominal wall's desmoid-type fibromatosis (desmoid tumor) is a rare, locally aggressive mesenchymal tumor with no potential for distant metastases. It can occasionally grow to a considerable size, leading to diagnostic confusion and presenting as a challenging surgical problem. This is a case of a giant desmoid tumor of the abdominal wall, which manifested as a panniculus morbidus (apron belly), thus causing an adult-acquired buried penis and reduced quality of life.
