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View Figure  		FIG. 2-55:  Acne vulgaris: Papules, papulopustules, pustules, nodules, and atrophic scars, as well as patulous ostia of infundibula that previously housed a comedo.

View Figure  		FIG. 2-56:  Acne: Comedones, papules, papulopustules, pustules, and hypopigmented atrophic scars.

View Figure  		FIG. 2-57:  Acne: Comedones, papules, and atrophic scars.

View Figure  		FIG. 2-58:  Acne keloidalis. Papules, some scaly, others crusted of acne keloidalis.

View Figure  		FIG. 2-59:  Acne conglobata. Comedones, papules, papulopustules, and honey-colored and hemorrhagic crusts, some of which have peculiar geometric outlines by virtue of lesions having become confluent, of acne conglobata.

View Figure  		FIG. 2-60:  Acne. Comedones, papules, papulopustules, and pustules.

View Figure  		FIG. 2-61:  Acne. Numerous milia, i.e., tiny infundibular cysts.

View Figure  		FIG. 2-62:  Acne. Tiny atrophic scars.

View Figure  		FIG. 2-63:  Acne keloidalis.Comedones, milia, keloids, and atrophic scars of acne keloidalis.

View Figure  		FIG. 2-64:  Steroid acne. Papules, situated mostly in the center of the face, are a result of topical application for months of high-potency corticosteroids, of steroid acne.

View Figure  		FIG. 2-65:  Steroid acne. Papules and papulopustules, each situated at the ostium of an infundibulum, a result of systemic administration of corticosteroid (steroid acne).

View Figure  		FIG. 2-66:  A plum-colored nodule, the result of rupture of an infundibular cyst, situated above a linear scar within which are dilated ostia of infundibula, each of which represents an opening of a pilonidal sinus.

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View Figure  		FIG. 2-67 (A, B):  Acne vulgaris. Papules, papulopustules, and hemorrhagic crusts.

View Figure  		FIG. 2-68:  Favre-Racouchot syndrome. Comedones and milia (small infundibular cysts) of Favre-Racouchot syndrome consequent to injury of skin by rays of the sun received for many decades. There also are seborrheic keratoses.

View Figure  		FIG. 2-69:  Neonatal acne. Milia, i.e., tiny infundibular cysts, range from pinpoint to papular and cover most of the face of a neonate (neonatal acne).