Practical podiatry : . st be re-membered that the treatment must be constitutional as wellas local and the family physician of the patient should at-tend to the former fea-ture of the ointments,applied twice daily, areusually employed lo-cally. Onychauxis, or hy-pertrophy of the nail, isan overgrowth or en-largement of the nailsof the fingers and the hypertrophyis accompanied by de-formity, the conditionis called onychogry-phosis. Derivation. Fromthe Greek, onyx-nail,and auxe-increase. Etiology. Enlarge-ment of the nail is a re-sult of hyperplasia ofthe papillae o
Practical podiatry : . st be re-membered that the treatment must be constitutional as wellas local and the family physician of the patient should at-tend to the former fea-ture of the ointments,applied twice daily, areusually employed lo-cally. Onychauxis, or hy-pertrophy of the nail, isan overgrowth or en-largement of the nailsof the fingers and the hypertrophyis accompanied by de-formity, the conditionis called onychogry-phosis. Derivation. Fromthe Greek, onyx-nail,and auxe-increase. Etiology. Enlarge-ment of the nail is a re-sult of hyperplasia ofthe papillae of the mat-rix, the thickening oc-curring at the base, front, lateral edges or over the entirearea of the nail depending on the part diseased. Pressure is no doubt a causative factor, and lack ofcare of the nails will also cause a thickening. Injury to thematrix will cause the nail to become hypertrophied, pro-ducing in most cases a true club nail ((mychogryphosis). Chronic cutaneous lesions, such as eczema or psoriasis. ONYCHOGRYPHOSIS 242 PODIATRY and other diseases sucli as syphilis, gout and rheumatism,and nervous diseases or injury to the nerves supplying thenails, may act as causes for onychauxis. Pathology. Pressure or injury causes a widening ofthe nail fold which allows the formation of a thicker nail bed is irritated at the same time and a horny massforms on it below the nail, which acts as a barrier to theforward movement of the nail cells, and by raising themup, determines more or less, the degree of deformity. Thepapillae of the matrix become enlarged, and may be seenprotruding above the normal structure, when the nail isremoved. The thickened and deformed nail thus produced, isoften the cause of other nail lesions, due to its pressure onthe soft tissues. Bacterial infection is also common at thispoint, due to the fact that the mass of epithelial cells isa good breeding place for microorganisms. Diagnosis. Onychauxis may be congenital or acquired,usually th
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