Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content +++ Seborrheic Dermatitis ++ Figure 12-1 Seborrheic dermatitis This term refers to a scaly, crusting, and erythematous eruption that is most common in infancy (ages 2-12 weeks), where it tends to favor the scalp, diaper area, and intertriginous folds. Figure 12-1 is an illustration of the process in the scalp where it is often referred to as cradle cap. Graphic Jump LocationView Full Size||Download Slide (.ppt) ++ Figure 12-2 Figure 12-2 illustrates severe involvement in the eyebrows, a common area of involvement. A subset of infants with seborrheic dermatitis will go on to develop atopic dermatitis and it sometimes may be difficult to differentiate between these two conditions. Graphic Jump LocationView Full Size||Download Slide (.ppt) ++ Figure 12-3 Seborrheic dermatitis Figure 12-3 shows very severe facial and scalp involvement. Some basic principles are that the lesions of seborrheic dermatitis are usually well circumscribed, do not itch, and localize toward the face, scalp, and intertriginous areas. The greasy red-orange scaliness of seborrheic dermatitis is somewhat helpful in differentiating this disorder from atopic dermatitis. Graphic Jump LocationView Full Size||Download Slide (.ppt) ++ Figure 12-4 Figure 12-4 shows a more extensive process that is nearly generalized, dry, and scaly. Seborrheic dermatitis has its onset early in infancy and usually resolves by 1 year of age; atopic dermatitis tends to be more persistent. Graphic Jump LocationView Full Size||Download Slide (.ppt) ++ Figure 12-5 Seborrheic dermatitis The cause of this very common condition remains unknown. Although it favors areas with an increased number of sebaceous glands, there is no evidence that seborrheic dermatitis is a disease of sebaceous glands or is related to excessive sebum production. Graphic Jump LocationView Full Size||Download Slide (.ppt) ++ Figure 12-6 Some studies have suggested that the lipid composition of sebum in seborrheic dermatitis may be abnormal. Bacteria and yeasts are often present in areas of involvement, but neither Candida albicans nor Pityrosporum ovale has been shown to be an etiologic agent. Graphic Jump LocationView Full Size||Download Slide (.ppt) ++ Figure 12-7 Seborrheic dermatitis Seborrheic dermatitis, common during infancy, is relatively unusual during later childhood. It resurfaces as a problem during adolescence and then seems to become progressively more common through adult life. The adolescent variant primarily involves the scalp, forehead, tarsal margins of the eyelids (blepharitis), ears, and nasolabial folds. Seborrheic dermatitis is easily controlled but not curable. Treatment may consist of the topical application of ketoconazole cream or a mild topical steroid. The frequent use of tar shampoos is particularly helpful in the control of seborrheic dermatitis of the scalp. Graphic Jump LocationView Full Size||Download Slide (.ppt) ++ Figure 12-8 During puberty and in adulthood, seborrheic dermatitis occurs not only on the scalp and face but also on the chest, on the back, and in intertriginous spaces such ... Your Access profile is currently affiliated with '[InstitutionA]' and is in the process of switching affiliations to '[InstitutionB]'. Please click ‘Continue’ to continue the affiliation switch, otherwise click ‘Cancel’ to cancel signing in. Get Free Access Through Your Institution Learn how to see if your library subscribes to McGraw Hill Medical products. Subscribe: Institutional or Individual Sign In Username Error: Please enter User Name Password Error: Please enter Password Forgot Password? Forgot Username? Sign in via OpenAthens Sign in via Shibboleth You already have access! Please proceed to your institution's subscription. Create a free a profile for additional features.