patch

(patsh) [L. pitte’cium; Gr. πιττάκιον]. An area differing from the rest of a surface. drab colored p., a peculiar spot on the liver after various tropical hepatic diseases. Hutch in son’s , a reddish or salmon-yellow patch of the cornea in syphilitic keratitis. mucous p., condyloma latum: a lesion characteristic of syphilis. opaline Ῥ., a mucous patch of the mouth sometimes seen in syphilis. Peyer’s p's, whitish patches of lymph-follicles in the mucous and submucous layers of the small intestine. salmon-p., a salmon-colored spot in the cornea in syphilis of that structure. white p., a white, opaque spot on the pericardium or on the capsule of the spleen, due to rubbing against a nodule of a rib in rachitis.