During a well-child exam, 10 café au lait spots on the trunk raise concern for which condition?

During a well-child exam, 10 café au lait spots on the trunk raise concern for which condition?

• A. Endocrine disorders
• B. Malignancy
• C. Neurofibromatosis
• D. Sturge-Weber syndrome

Answer: (C)

Multiple café-au-lait spots in a child are a strong clue for neurofibromatosis type 1. Having six or more such spots is one of the standard diagnostic criteria for NF1, and ten on the trunk makes this diagnosis highly likely even before other features appear. NF1 is a genetic, autosomal dominant condition with variable expression, so children may later develop additional signs such as freckling in the armpits or groin, neurofibromas, Lisch nodules in the iris, optic pathway gliomas, or bone abnormalities. Because of this, the finding should prompt a referral for comprehensive evaluation, including ophthalmology for Lisch nodules and genetic counseling, and ongoing surveillance for potential complications. Other conditions aren’t driven by this pattern of multiple café-au-lait spots (for example, Sturge-Weber presents with facial port-wine stains rather than numerous café-au-lait macules).

Multiple café-au-lait spots in a child are a strong clue for neurofibromatosis type 1. Having six or more such spots is one of the standard diagnostic criteria for NF1, and ten on the trunk makes this diagnosis highly likely even before other features appear. NF1 is a genetic, autosomal dominant condition with variable expression, so children may later develop additional signs such as freckling in the armpits or groin, neurofibromas, Lisch nodules in the iris, optic pathway gliomas, or bone abnormalities. Because of this, the finding should prompt a referral for comprehensive evaluation, including ophthalmology for Lisch nodules and genetic counseling, and ongoing surveillance for potential complications. Other conditions aren’t driven by this pattern of multiple café-au-lait spots (for example, Sturge-Weber presents with facial port-wine stains rather than numerous café-au-lait macules).