Schistosomiasis mansoni of the appendix in a patient with acute appendicitis

Ectopic Schistosoma mansoni Eggs Inside a Lipoma

“…1 Some authors suggest that the parasite may migrate from the pelvic veins through the vertebral plexus and arrive at the spinal vessels, which would explain its characteristic zosteriform distribution. 1,2,5,7 Others have proposed the embolization of S. mansoni eggs through arteriovenous shunts opened by portal hypertension due to the hepatosplenic form of schistosomiasis. 3,6,8,[10][11][12] Clinically, the lesions appears as isolated or coalescent papules, with a herpetiform arrangement or zosteriform distribution.…”

“…[2][3][4] Ectopic schistosomiasis has been reported in the cecal appendix, gallbladder, pancreas, peritoneum, urogenital system, central nervous system, myocardium, skin, esophagus, stomach, thyroid, and adrenal glands. [2][3][4][5][6][7][8][9][10][11][12] Ectopic lesions, to which eggs or worms may migrate and cause granulomas on the skin and extragenital or rectal mucosae are rare in every form of schistosomiasis, even in regions where parasitosis is highly endemic. 2,3,5,6 Identification of Schistosoma eggs at the anatomopathological examination is mandatory for diagnosis.…”

Schistosomal peritonitis secondary to perforated appendicitis

“…6 Since then, there have been reports of acute schistosomal granulamotous appendicitis from endemic populations in South America and Africa, as well as from travelers and migrants returning from endemic areas. 3,[7][8][9][10][11][12] In a retrospective study from Nigeria, in 27 (2.3%) of more than 1,000 cases of appendicitis, schistosome eggs were seen in histological sections. 8 About 56% of these cases were caused by S. mansoni, 26% by S. haematobium, and 19% by S. mansoni/S.…”