Term Name:	pityriasis rosea
Synonyms:	Pityriasis circinata
Definition:	A dermatitis that 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.
Ontology:	Human Disease [DOID:8892]   ( DOID:8892 )