Chronic pigmented purpura induced by chemical substances.
D002617:Chemical Industry; D002908:Chronic Disease; D004396:Coloring Agents / Q000009:adverse effects; D009783:Dermatitis, Occupational / Q000139:chemically induced; D003875:Drug Eruptions / Q000209:etiology; D004391:Dust; D006801:Humans; D008297:Male; D008875:Middle Aged; D010859:Pigmentation Disorders / Q000139:chemically induced*; D011693:Purpura / Q000139:chemically induced*; D013831:Thiamine / Q000009:adverse effects
D004396:Coloring Agents; D004391:Dust; D013831:Thiamine