Epidermoids; clinical evaluation and surgical results.

摘要: T HE "EPIDERMOIDS" or "eholesteatomas" often present opportunities for complete removal and cure. This is due to their frequent epidural position, avascular character, extremely slow development. Our paper deals with the surgical t rea tment results of group ~r "epidermoids" verified on Neurosurgical Service Hospital University Pennsylvania Graduate since 1930. I not intended at this time go into slightly controversial etiology these tumors, as they are now generally accepted be product epithelial cell rests. Discussion has arisen concerning better name tumors. At present, term "choles teatoma" synonymous "pearly tumor" "epidermoid," latter being choice. 5'15'1s A difference opiaion also arises whet [er cholesterin-containing masses, arising in petrous portion temporal bone, should classified true tumors cholesteatoma group. The majority pathologists believe cholesteatomatous associated chronic otitis media, unrelated epidermoid They merely result some inflammatory desquamative process2 '18 These best designated by "cholesteatoses. ''2 fact that both "dermoids" contain cholesterin serves confuse differential diagnosis. point dermoids hair other dermal elements mode origin. Critchley Ferguson ~ pointed out occur a fetal inclusion epidermal cells which, depending depth layer according embryonic age, produce an dermoid type tumor. review literature time, one referred more exhaustive works Mahoney, 12 King, 1~ Rand Reeves. 18 However, brief historical outline included reveal development terminology theory origin 1807--Pinson, 17 artist School Medicine Paris, first described tumor from Dupuytren ' s service HStel Dieu. 18~9--Cruveilhier, 6 his Anatomie Pathologique, fully Pinson parapitui tary same type. Because highly refractile nodular surface, he gave them name, tumeur perlde.