FIGURE 96.15 Severe seborrheic dermatitis (yellow, greasy-appearing plaques) (Reprinted with permission from Kyle T, Carman S Essentials of Pediatric Nursing 2nd ed Philadelphia, PA: Lippincott Williams & Wilkins; 2012.) Fontanelles The anterior fontanelle, situated at the junction of the coronal and sagittal sutures, usually measures about cm × cm (can be up to to cm in its long axis) and normally closes between and 18 months (range to 24 months) The posterior fontanelle, situated at the junction of the lambdoidal and sagittal sutures, generally measures between 0.5 and cm (may be closed at birth in some cases) and usually closes to palpation by to months of age Enlarged fontanelles may be associated with a variety of conditions, including prematurity,