Abstract
A 28-year-old woman visited our hospital because of swelling of the right lateral chest wall. Chest and abdominal CT and MRI revealed multiple cysts in the chest and abdominal walls; therefore, hemangioma was suspected. During the operation, we first incised the skin just above the chest wall tumor along the rib. The chest wall tumor, which was enclosed by a thin membrane, was resected from the serratus anterior and intercostal muscle. Subsequently, we extended the incision to the abdominal wall and transected the costal arch. Then, we performed a laparotomy. The abdominal wall tumor, which mainly contained cysts, was partially connected to the chest wall tumor and pressed upon the liver from outside the peritoneum. Thus, the abdominal tumor was also resected. The pathological diagnosis was intramuscular hemangioma. In addition, the chest and abdominal wall tumors had the same origin. It is rare for hemangioma to develop in deep soft tissue. Furthermore, a large hemangioma involving the chest and abdominal walls is even more rare. Considering the frequency of this condition and radiographic findings, we hypothesize that this hemangioma grew in the inferior intercostal muscle and developed into the abdomen.
