RT Book, Section A1 Magro, Cynthia M. A1 Crowson, A. Neil A1 Harrist, Terence J. A2 Barnhill, Raymond L. A2 Crowson, A. Neil A2 Magro, Cynthia M. A2 Piepkorn, Michael W. A2 Kutzner, Heinz A2 Desman, Garrett T. SR Print(0) ID 1178388888 T1 Intraepidermal Vesiculopustular Diseases T2 Barnhill's Dermatopathology, 4e YR 2020 FD 2020 PB McGraw Hill Education PP New York, NY SN 9780071828222 LK dermatology.mhmedical.com/content.aspx?aid=1178388888 RD 2024/04/19 AB A wide variety of disorders may produce intraepidermal vesicles and pustules. Distinct diseases may have similar or even identical pathologic features. In addition, the histopathologic findings in each disease evolve over time. Thus the algorithmic approach to diagnosis in this group is, of necessity, complex but facilitates the diagnosis in this group of disorders (Figs. 7-1, 7-2, 7-3, Table 7-1), and especially when correlated to clinical and historical data often proves essential. The algorithm narrows the differential diagnosis to a few entities or a specific diagnosis through evaluation of the blister-cleft separation plane, the principal pathologic process, and if present, the inflammatory cell complement. Immunofluorescent and/or serologic studies are of paramount importance.