pustular psoriasis generalized pustular psoriasis https://github.com/monarch-initiative/mondo/issues/4496 MEDGEN:473074 Orphanet:247353 ICD10CM:L40.1 UMLS:C0343055 MONDO:0100491 A rare and extreme form of psoriasis characterized by the appearance of sterile pustules which can take many patterns. All the main pathological features of the disease are accentuated. Generalized pustular psoriasis is clinically heterogeneous in its age at onset, precipitants, severity, and natural history. Many overlapping clinical entities are recognized. There is a relationship between these entities and plaque psoriasis, as some individuals may have episodes of plaque psoriasis preceding or following the generalized pustular psoriasis, but in others generalized pustular psoriasis occurs as the sole phenotype without plaque psoriasis at any time. GARD:0026245 SCTID:238612002