Hồng ban, nhờn, viêm da có vảy ở các vùng sản xuất bã nhờn của da đầu, mặt, nếp gấp intertriginous, và đáy chậu Chủ yếu là ảnh hưởng đến trẻ sơ sinh (da đầu và các khu vực intertriginous) và vị thành niên (mặt, vùng intertriginous, đáy chậu) Pityrosporum ovale (men sinh vật) thường được tìm thấy trong | Chapter 13 Dermatology 255 Seborrheic Dermatitis Essentials of Diagnosis Erythematous greasy scaly dermatitis in the sebum-producing areas of face scalp intertriginous folds and perineum Affects mainly newborns scalp and intertriginous areas and adolescents face intertriginous areas perineum Pityrosporum ovale yeast organism often found in affected areas. Possibly pathogenic Leiner disease severe widespread infantile seborrheic dermatitis associated with functional defect in C5 complement. Wasting diarrhea failure to thrive superimposed infections Visual diagnosis is key. Skin biopsy findings are nonspecific Differential Diagnosis May resemble atopic dermatitis of the scalp in infants Psoriasis occurs in seborrheic areas in older children Pityriasis rosea herald patch and distribution should distinguish Tinea dermatophytoses infections Treatment Low-potency topical corticosteroids usually suffice Leiner disease may require therapy with fresh frozen plasma FFP Disease severity is usually worse in adults than children Pearl Seborrhea cradle cap is not treated the same as dandruff in adults. Vigorous scrubbing of the scalp adult dandruff shampoos and picking the scales may damage the infant s delicate skin and increase the risk of infection. A little warm olive oil to loosen scales followed by gentle shampoo is a time-honored harmless therapy. 13 256 Current Essentials Pediatrics 13 Pityriasis Rosea Essentials of Diagnosis Papulosquamous eruption of school-aged children with small red oval plaques with fine scales often aligned parallel to skin tension lines In 20-80 the generalized rash is preceded for up to 30 days by a single larger scaly plaque with central clearing herald patch often on the trunk in whites or extremities in blacks Human herpes virus 7 may be a pathogen Lasts about 6 weeks with mild-moderate pruritus History and visual diagnosis are key. Biopsy may be required in confusing cases Differential Diagnosis Herald patch looks like ringworm Secondary .
