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The major apparent difference between our study and that of Smith et al is that four of the seven patients they studied were black individuals. None of these individuals had the linear deposits of Ig at the basement membrane zone, which we reported in lichen planopilaris. In contrast, two (66%) of the three white or Hispanic individuals whom they studied did show linear deposits at the basement membrane zone.Our interpretation is that scarring alopecia in black individuals may not be due to, or has a different pathogenesis from, lichen planopilaris in white and Hispanic individuals.
Bystryn J. Immunofluorescence Findings in Lichen Planopilaris: A Contrasting Experience-Reply. Arch Dermatol. 1992;128(10):1406. doi:10.1001/archderm.1992.01680200118025
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