TY - CHAP M1 - Book, Section TI - Pigmented Purpuric Dermatoses A1 - Haden, Alexandra A1 - Peng, David H. A2 - Kang, Sewon A2 - Amagai, Masayuki A2 - Bruckner, Anna L. A2 - Enk, Alexander H. A2 - Margolis, David J. A2 - McMichael, Amy J. A2 - Orringer, Jeffrey S. PY - 2019 T2 - Fitzpatrick's Dermatology, 9e AB - AT-A-GLANCEA group of dermatoses characterized by petechiae, pigmentation, and occasionally, telangiectasia.Found most commonly on the lower extremities; however, lesions may involve the upper body but rarely become generalized.Benign, generally asymptomatic eruptions that tend to be chronic with flares and remissions.Common histopathologic features include a superficial lymphocytic infiltrate, erythrocyte extravasation, and hemosiderin deposition.Clinical variation between eruptions led to their subclassification into eponymic groups; however, frequent overlap may make differentiation difficult. SN - PB - McGraw-Hill Education CY - New York, NY Y2 - 2024/03/28 UR - accessmedicine.mhmedical.com/content.aspx?aid=1161350140 ER -