It is known as the dorsal
mesogastrium or greater omentum in the region of the stomach, the dorsal mesoduodenum in the region of the duodenum, and the dorsal mesocolon in the region of the colon.
Accessory spleen, in other words supernumerary spleens, splenunculi, or splenules, results from the failure of fusion of the primordial splenic buds in the dorsal
mesogastrium during the fifth week of fetal life.
Mixed race, 33 year-old patient, without prior major medical or gynecological history; she presented stabbing abdominal pain in
mesogastrium radiating to the rest of the abdomen, associated with emesis, hyporexia, general malaise, chills and dizziness with menstrual failure ofseven weeks two days.
The spleen develops from the coelomic epithelium of the cranial part of the dorsal
mesogastrium (Sadler [2]; Standring [1]) in the sixth week of intrauterine life.