A Soft Tissue Aneurysmal Bone Cyst in Thoracic Cavity

Abstract

Objective primary aneurysmal bone cyst is a benign, locally aggressive and expansive tumor that typically occurs in long bones or vertebral bodies of children and young adults. Aneurysmal bone cysts originating from the soft tissue are extremely rare, and there has been only one case of soft tissue aneurysmal bone cyst located in the thoracic region. Almost all cases of intrathoracic aneurysmal bone cyst are associated with ribs. We describe a case of primary aneurysmal bone cyst of the soft tissue in the thoracic cavity of a 15-year-old boy. Although initially the tumor was considered cyst hydatid on radiological imaging, microscopic features of the tumor were identical to those of classical aneurysmal bone cyst. Intrathoracic aneurysmal bone cyst, an associated with ribs is extremely rare, due to aneurysmal bone cyst originating from the soft tissue of thoracic cavity, however, radiological and pathological data along with the evaluation can be diagnosed.