Tuberculosis of the skin is so rare in the United States that the question may be asked why attention should again be drawn to its classification. The dermatologic manifestations of tuberculosis are extremely diverse, and, even though all are due to the tubercle bacillus, it would be not only inadequate but a long step backward to call them all merely "tuberculosis of the skin." What, then, are the purposes of a classification ? Obviously, the most important one is to afford the physician an adequate basis for a correct prognosis for a given tuberculoderma as well as to aid in the proper management of the individual case. Because of the great variation in the severity, course and prognosis of the various forms of cutaneous tuberculous inflammation, a more specific diagnosis than "tuberculosis of the skin" is essential. Furthermore, it is by means of classification that both undergraduate and postgraduate
MICHELSON HE, LAYMON CW. CLASSIFICATION OF TUBERCULOSIS OF THE SKIN. Arch Derm Syphilol. 1945;52(2):108–113. doi:10.1001/archderm.1945.01510260038008
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