The pathology and surgical treatment of tumors . ng an injury are produced in thesame manner as the traumatic epithelial cysts described in the begin-ning of this section. They arise from transplantation of conjunctival epithelium into the deep tissues of thecornea. Cysts of the Vitello-intestinal Duct.—The profession is greatly indebted toJ. Bland Sutton for a more thoroughunderstanding of cysts of the vitello-intestinal duct and cysts of the investigations have done the mosttoward enabling surgeons to refer hith-erto obscure cysts in these localities totheir origin from remnants
The pathology and surgical treatment of tumors . ng an injury are produced in thesame manner as the traumatic epithelial cysts described in the begin-ning of this section. They arise from transplantation of conjunctival epithelium into the deep tissues of thecornea. Cysts of the Vitello-intestinal Duct.—The profession is greatly indebted toJ. Bland Sutton for a more thoroughunderstanding of cysts of the vitello-intestinal duct and cysts of the investigations have done the mosttoward enabling surgeons to refer hith-erto obscure cysts in these localities totheir origin from remnants of embry-onic life. Cysts of the vitello-intestinalduct (Fig. 116) connected with the um-bilicus of babes and young children,and varying in size from a pea to acherry, are of frequent are usually pedunculated, and arecomposed of unstripcd muscle-fibre,mucous membrane, Lieberkiihns folli-cles, and columnar epithelium collectedin a mass. These cysts may enlarge,rupture spontaneously, and leave a sinus from which escapes a watery. Vitello-intestinaldud. Fig. 116.—Diagram of the alimentarycanal of the embryo, showing the positionof the yolk-sac (after Sutton). CYSTOMA. 201 discharge. In rare cases that part of the vitello-intestinal duct con-nected with the ileum becomes the seat of cyst-formation. Such acase was reported by Roth. Occasionally the entire duct remainspatent, when part of the intestinal contents escape from its opening atthe umbiHcus. Sutton has traced imperforate ileum to the vitello-intestinal duct. Allantoic (Urachus) Cysts.—The urinary bladder of man presentsat its apex an impervious cord, known as the urachus, which passes tothe umbilicus. The duct is obliterated at birth, and in the adult lies inthe subperitoneal tissue in the middle line of the anterior abdominalwall. If the urachus does not become obliterated in any part of itscourse, it becomes dilated, and the cyst is found outside the peritoneumand in close relation with the bladder.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectneoplas, bookyear1895
