. Surgery, its principles and practice . colic,and the internal or free. Of these, the anterior, when traced down to itscommencement, will lead to the base of the appendix. This means^however, will be of little assist-ance when, as is so often thecase, the structures are inex-tricably matted together byadhesions. The appendix whennot readily found may be her-niated, as will be presentlyshown. Pericecal Fossae.—Thereare several fossae or pocketsin the peritoneum about thececum, and the appendix maybe lodged in either of two ofthem and thus be hidden fromview (retroperitoneal hernia ofthe append
. Surgery, its principles and practice . colic,and the internal or free. Of these, the anterior, when traced down to itscommencement, will lead to the base of the appendix. This means^however, will be of little assist-ance when, as is so often thecase, the structures are inex-tricably matted together byadhesions. The appendix whennot readily found may be her-niated, as will be presentlyshown. Pericecal Fossae.—Thereare several fossae or pocketsin the peritoneum about thececum, and the appendix maybe lodged in either of two ofthem and thus be hidden fromview (retroperitoneal hernia ofthe appendix). In many casesit can be readily extricated; inothers the orifice of the fossabecomes closed by adhesionsand the organ is found withthe greatest difficulty. Thiscondition of affairs was prob-ably the case in many examples of so-called absence of the is believed that inflammatory phenomena are more likely to originate idge of rectus. ascend. Colo, crest of ilium. .;.sp(ne afyj^endixedjet^Tvclus -. Fig. 407.—Average Position of the IleocecalValve, Cecum, and Appendix on Spino-umbil-icAL Line (Keith). TYPHLITIS, PERITYPHLITIS, EPITYPHLITIS. 735 in such herniated appendices, in which case the abscess is essentiallyretroperitoneal. These fossae are the ileocecal or ileo-appendicular, and the subcecalor retrocolic. The former, situated in the ileocecal angle, is boundedin front by a fold of peritoneum—the ileocecal fold (bloodless fold ofTreves), behind by the mesoappendix, and above by the end of the orifice looks down and to the left; it is quite large, as a rule, admittingtwo fingers as far as the first joints, and is found in nearly every is most frequent into this fossa. The subcecal fossa is bounded in front by the posterior walls of theascending colon and cecum, behind by the peritoneum of the posterior u/nbili cus mans vener Weso- colon. jejunum in pelvis ? j . mesenteri/ ofI right lumbal-coil\ 0^jejunum.
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