In June, 1923, I reported before the Forty-Sixth Annual Meeting of the American Dermatological Association1 the observations on thirty-six cases of a skin condition which I called, after Jeanselme's original name, achromia parasitaria. The disease has been observed since then with fair frequency in Cuba, and it has been the subject of much discussion at the meetings of the Cuban Dermatological Society where the parasitic nature of the ash-white spots was doubted, until I succeeded in demonstrating the presence of mycelial threads in the deep part of the corneous layer.
In the United States little attention has been given to this subject aside from the efforts of Prof. Howard Fox to cultivate fungi from the scales of similar lesions. The general attitude in America has been one of doubt about the real parasitic nature of this condition, and the common impression seems to be that it is a partial
PARDO-CASTELLO V. ACHROMIA PARASITARIA: ITS TRUE NATURE AND ETIOLOGY. Arch Derm Syphilol. 1932;25(5):785–789. doi:10.1001/archderm.1932.01450020811001
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