A text-book of the diseases of the ear and adjacent organs . y& Fig. 27~.- LOBULATKD BRANCHED LTPCS OFTHE TtM- PANIC Cavttt. ML either arise from the superficial or deeper layers of -- cutis, or fromthe periosteum and the connective: issue covering of the bones. Onthe membrana tympani the root of the polypus arises usually fromthe superior posterior section and from Shrapnells membrane, AURAL POLYPI. 531 occasionally from the edges of a perforation or paracentesis often simultaneous polypous growths are found in the middleear, on the membrana tympani, and in the meatus. The occurr
A text-book of the diseases of the ear and adjacent organs . y& Fig. 27~.- LOBULATKD BRANCHED LTPCS OFTHE TtM- PANIC Cavttt. ML either arise from the superficial or deeper layers of -- cutis, or fromthe periosteum and the connective: issue covering of the bones. Onthe membrana tympani the root of the polypus arises usually fromthe superior posterior section and from Shrapnells membrane, AURAL POLYPI. 531 occasionally from the edges of a perforation or paracentesis often simultaneous polypous growths are found in the middleear, on the membrana tympani, and in the meatus. The occurrence of polypi in the tympanic cavity without perfora-tion of the membrana tympani is shown by the observations ofZaufal and Gottstein (A. f. 0., vol. iv.). They bulge the membraneoutward, and may even produce perforation. Aural polypi occur in one ear either singly or multiple. In casesof multiple polypi long contact may cause the union of two originallyseparate. The size of aural polypi varies greatly. Most commonly they are. about as big as a pea or a large date-kernel, but they may attain asize greater than the longitudinal diameter of the meatus (Fig. 274),so that the tumour projects beyond the external orifice of the the other hand, it has been already mentioned that microscopi-cally small polypi may occur in the middle ear and on the membranatympani. The form of polypi is generally long and club-shaped, more rarelyglobular or knob-like (Fig. 276). Their surface is smooth or lobulated,glandular and raspberry-like. Frequently in the neighbourhood ofthe root of large and smooth polypi a number of papillary excres- 532 STRUCTURE OF AURAL POLYPI. cences are found (Fig. 275).a thin, pedunculated root. The growth has either a broad base or Structure of Aural Polypi.—When one examines histologically a numberof aural polypi one finds on the whole two leading forms, round-celled polypi,and fibromata. Pure myxoma, or principally epithelial tumours are rare. The round-celle
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecteardiseases, bookyear
