A text-book on diseases of the ear, nose and throat . of theinner nose and appear externally or extend down to the larynx. Suchgrowths may be four or five inches in length and correspondingh bulky. 331 332 DISEASES OF THE NOSE AND NASOPHARYNX. Polypi may have several lobes, and their attachment may be broad, sothat they form sessile tumors. The sha^De of the larger ones is muchinfluenced by the nasal passages in which they grow, so that they maybe long and flattened or branched to fit into the meatuses or into oneanother. Those found in the nasopharynx assume a globular or pyri-form shape. Pol
A text-book on diseases of the ear, nose and throat . of theinner nose and appear externally or extend down to the larynx. Suchgrowths may be four or five inches in length and correspondingh bulky. 331 332 DISEASES OF THE NOSE AND NASOPHARYNX. Polypi may have several lobes, and their attachment may be broad, sothat they form sessile tumors. The sha^De of the larger ones is muchinfluenced by the nasal passages in which they grow, so that they maybe long and flattened or branched to fit into the meatuses or into oneanother. Those found in the nasopharynx assume a globular or pyri-form shape. Polypi may be very numerous, but generally not morethan from six to ten are found in one nasal fossa. The source of origin is oftenest the lower border of the middle tur-binal and middle meatus, but they may grow from any part of themucous surface, even the septum, the lower turbinal, and the nasal floor,though polypi in these last-named locations are very rare and usuallysingle. The ethmoid region forms the territory on which mucous polypi Fig. 122. ^. Right nasal fossa. (Bresgen.) Two large polypi (P P) with more than one attachment; T, Eustachian tube. flourish, so that the middle turbinal, middle meatus, upper turbinal, andupper meatus are the chief places of origin of these growths. They arealso found attached to the edges of the hiatus semilunaris, or growingfrom the openings of the accessory sinuses, or originating even fromwithin the antrum of Highmore and the ethmoid cells. Nasal mucous polypi are connective-tissue growths. In the typicalsoft polypus this forms a delicate reticulum of fibres resembling embry-onal connective tissue, the reticulum consisting of a coarser net-workof fibres enclosing a finer one. The outer surface of the nasal mucouspolypus is covered with ciliated epithelium and a basement membranelike the rest of the mucous lining or the nasal fossae. In places the NASAL TUMOES. 333 epithelium may change to the pavement variet3\ Nerve-fibres havebeen demons
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