All pustular nodules are not bacterial.
A case of lymphocutaneous sporotrichosis was thought to represent bacterial pyoderma. Lack of recognition led to excessive costs and a delay in the institution of specific therapy. The differential and an approach to diagnosis of pus-containing nodules are discussed.
D000328:Adult; D001424:Bacterial Infections / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D008196:Lymph; D008297:Male; D011711:Pyoderma / Q000175:diagnosis; D012874:Skin Diseases, Infectious / Q000175:diagnosis* / Q000382:microbiology; D013174:Sporotrichosis / Q000175:diagnosis*