Retroperitoneal spontaneous hematomas are rare causes of distress and deformity in the upper part of the abdomen. Encapsulation by a fibrous wall may cause persistent symptoms and signs. A patient with a large encapsulated hematoma of the omental bursa is described in whom surgical management, utilizing transgastric internal drainage by means of a cyst-gastrostomy, was successful.
Grannis FW, DuBois DD, Welch JS. Transgastric Drainage of a Large Encapsulated Omental Sac Hematoma. Arch Surg. 1974;108(1):104-106. doi:10.1001/archsurg.1974.01350250090024