Clinical features

Acne vulgaris (common acne) shows variable involvement of seborrheic areas of upper torso, namely, upper back, sternal area, shoulders, and upper arms [Figure 19] and [Figure 20] [Table 2]. The full spectrum includes many types of comedones [Table 3] - blackheads (open comedones), whiteheads (closed comedones), missed comedones, macrocomedones, sandpaper comedones, submarine comedones [Figure 24],[Figure 25],[Figure 26]; [4] inflammatory lesions - papules, pustules, nodules, cysts, macules [Figure 27],[Figure 28],[Figure 29],[Figure 30],[Figure 31]; atrophic scars - rolling, boxcar, ice-pick; hypertrophic scars and keloids; and acne hyperpigmented macules (AHM) [Figure 32],[Figure 33],[Figure 34],[Figure 35],[Figure 36],[Figure 37],[Figure 38].