The subject of diseases of the nails has always been preplexing. The term onychia or paronychia has often proved a blessing in disguise until the true nature of an infection was elicited. With the avalanche of literature concerning mycotic infections, the task of diagnosis has become easier. To further the diagnosis of diseases of the nail I present the following report.
REPORT OF A CASE
A. R., a white man, 38 years of age, a dentist, sought advice regarding a painful nail with a black linear growth, ⅛ inch (0.32 cm.) wide, extending from the matrix to the end of the nail of the third finger on the right hand (fig. 1).The lesion had made its appearance two years before as a red streak, advancing from the matrix with the growth of the nail. Simultaneously, there was a gradual formation of a ridgelike convex elevation of the entire nail.
YOUNG WJ. PIGMENTED MYCOTIC GROWTH BENEATH THE NAIL. Arch Derm Syphilol. 1934;30(2):186–189. doi:10.1001/archderm.1934.01460140012002
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