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CLINICAL TRIAL
JOURNAL ARTICLE
A pilot study comparing histological and immunophenotypic patterns in stage 4 skin graft vs host disease from toxic epidermal necrolysis.
Journal of Cutaneous Pathology 2017 October
BACKGROUND: Stage 4 skin graft-versus-host disease (GVHD) is associated with poor prognosis and high mortality rates. Clinical and histologic similarities with toxic epidermal necrolysis (TEN) make it difficult to distinguish between these 2 life-threatening conditions.
METHODS: A retrospective cohort study was conducted from a tertiary referral center. Skin biopsies were obtained from 11 patients who developed stage 4 skin GVHD and 11 patients who developed TEN between 2005 and 2012. The CD8+/CD4+ T lymphocyte ratios were assessed in lesional skin specimens.
RESULTS: Average CD8+and CD4+ cell counts co-expressing CD3 were 126.29 (range 86.42-173.06) and 84.60 (29.87-197.20) for stage 4 skin GVHD patients, and 61.97 (45.79-146.67) and 7.65 (0.00-39.50) for TEN patients, respectively. Immunohistochemical studies of stage 4 skin GVHD and TEN skin demonstrated average CD8+/CD4+ ratios of 1.78 (range 0.69-3.09) and 7.33 (1.16-12.3), respectively (P = .013).
CONCLUSIONS: Stage 4 skin GVHD and TEN are processes with cytotoxic profiles. TEN is notable for a greater relative depletion of CD4+ T lymphocytes compared with stage 4 skin GVHD, while stage 4 skin GVHD tends to be more inflammatory than TEN. These data suggest an immunohistologic method by which these 2 entities may be distinguished.
METHODS: A retrospective cohort study was conducted from a tertiary referral center. Skin biopsies were obtained from 11 patients who developed stage 4 skin GVHD and 11 patients who developed TEN between 2005 and 2012. The CD8+/CD4+ T lymphocyte ratios were assessed in lesional skin specimens.
RESULTS: Average CD8+and CD4+ cell counts co-expressing CD3 were 126.29 (range 86.42-173.06) and 84.60 (29.87-197.20) for stage 4 skin GVHD patients, and 61.97 (45.79-146.67) and 7.65 (0.00-39.50) for TEN patients, respectively. Immunohistochemical studies of stage 4 skin GVHD and TEN skin demonstrated average CD8+/CD4+ ratios of 1.78 (range 0.69-3.09) and 7.33 (1.16-12.3), respectively (P = .013).
CONCLUSIONS: Stage 4 skin GVHD and TEN are processes with cytotoxic profiles. TEN is notable for a greater relative depletion of CD4+ T lymphocytes compared with stage 4 skin GVHD, while stage 4 skin GVHD tends to be more inflammatory than TEN. These data suggest an immunohistologic method by which these 2 entities may be distinguished.
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