[Hydatid cysts of the spigelian lobe (segment I) of the liver: clinical and therapeutic particularities].

Objective: Hydatid cysts of the spigelian lobe, that is, segment I of the liver, are rare. We analyzed their clinical and therapeutic particularities.

Methods: We conducted a retrospective search for the hydatid cysts of the liver treated surgically in our department from January 1, 1994, through December 31, 2005.

[Peritoneal gelatinous ascites].

Pseudomyxoma peritonei or gelatinous ascites is a rare clinical entity, and its pathogenesis remains obscure. It most often follows a mucinous tumor of the appendix. An ovarian origin in woman has been suggested but remains controversial.

[Gastric sarcoma].

Sarcoma of the stomach is a rare histological entity. These differentiated mesenchymal tumors do not differ clinically from other gastric cancers. Endoscopic ultrasonography is the preferred means of exploration because it determines the existence of a submucosal lesion and provides guidance in determining its type.

[Linitis plastica].

Linitis plastica accounts for 3-19% of gastric cancers. Its diagnosis requires morphology findings of an infiltrating stomach tumor and pathology findings including signet-ring cells and fibrous stroma. Its etiology is not known, and it has no particular features.