July 1988

Picture of the Month

Author Affiliations

Contributed from the Department of Dermatology, College of Physicians & Surgeons of Columbia University, New York.

Am J Dis Child. 1988;142(7):785-786. doi:10.1001/archpedi.1988.02150070099036

The statements listed below are best associated with which of the above figures:

  • (a) This condition is usually self-limited, and its cause is unknown.

  • (b) Lesions are often nonpruritic and are located on the genitalia, most commonly on the penis, in this chronic dermatosis.

  • (c) Renal involvement occurs infrequently, and the disease is usually not severe.

Denouement and Discussion  (a) Pityriasis rosea is an idiopathic, common, self-limited, inflammatory papulosquamous dermatosis. It occurs most commonly in females between the ages of 10 and 35 years during the fall, winter, and spring months. Approximately seven to 14 days after the onset of a "herald patch," a generalized eruption of similar lesions appears, usually with their long axis along the skin tension lines in a fir or Christmas tree distribution (Fig 2). Characteristically, the lesions are located from the neck to the thighs, remain for six weeks to two months, and resolve