Figure 4. Inflamed papules and pustules, features of severe acne vulgaris. Figure 5. Nodular and cystic lesions may appear in extreme cases of acne, causing severe scarring. Aggravating factors in ...

Another study of 21 adolescents with acne fulminans and severe cystic acne found lytic bone lesions in 10 (48%) patients, and 14 (67%) had increased uptake on bone scans. Common locations were the ...