dermatitis psoriasis exanthem pityriasis rosea https://www.malacards.org/card/pityriasis_rosea ICD10CM:L42 Pityriasis circinata UMLS:C0032026 Pityriasis rosea ICD9:696.3 Wikipedia:Pityriasis_rosea ICD10WHO:L42 MEDGEN:18492 NCIT:C26855 EFO:1000756 MESH:D017515 icd11.foundation:919892859 SCTID:77252004 A mild, self-limited skin disorder that is most commonly seen in children and young adults. It is characterized by an initial large round spot on the chest, abdomen, or back, often referred to as a herald patch, that is usually followed within a week by a distinctive pattern of similar but smaller papules on the torso, arms, and legs. There may also be itching, especially when overheated. DOID:8892 MONDO:0006601