File:Modern surgery, general and operative (1914) (14779010061).jpg

Identifier: modernsurgerygen1914daco (find matches)
Title: Modern surgery, general and operative
Year: 1914 (1910s)
Authors: Da Costa, J. Chalmers (John Chalmers), 1863-1933
Subjects: Surgery Surgery, Operative
Publisher: Philadelphia, London, W. B. Saunders company
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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the mouth. Such cysts are also found inthe ovary, testicle, brain, eye, mediastinum, lung, omentum, mesenter>% andcarotid sheath. A dermoid of the lumbosacral region may be mistaken for a spina bifida.Sarcoma may form from the connective-tissue elements of the wall of a der-moid cyst. A dermoid cyst may become cancerous, or innocent epithelialtumors may originate from the cyst lining. The epithelial cells may becomefatty and an oil-cyst may actually form. If the cyst epithelium was derivedfrom mucous membrane, mucus may gather in the sac. A dermoid cystmay inflame or even suppurate. It is free from pain unless it suppurates,inflames, or develops into a malignant tiunor; it grows slowly and rarelyattains any considerable size imless it arises in the ovary. A subcutaneousdermoid may or may not fluctuate. It is not in the skin as is a sebaceouscyst, but the skin can be moved over it. A sebaceous cyst moves withthe skin. Subcutaneous dermoids about the orbit are adherent to the under-
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Fig. 185.—Traumatic dermoid cyst. King periosteum. The matrLx of a true dermoid is congenital, but the cystoften does not appear until puberty or later. Teratoids and dermoids con-nected with the rectum require special consideration (see page 1165). Treatment.—Complete extirpation. If any of the epitheliimi of the cyst-waU is left, the cyst will re-form. A superficial dermoid should be removedin the same manner as a sebaceous cyst, and if it is adherent to imderlyingperiosteum the portion of this membrane to which it adheres should also beremoved. A deep dermoid ought to be removed as a tiunor would be, ifoperation is feasible. Branchial Cysts and Fistulae.—When a branchial cleft fails to becomecompletely obliterated, a branchial cyst may form. The branchial clefts arethe analogues of the gill-slits of a fish. There are fomr of these clefts on eachside of the neck. They are called clefts, but they are really grooves, and eachgroove on the skin has its counterpart in the mucous m

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