RT Book, Section A1 Wataya-Kaneda, Mari A2 Kelly, A. Paul A2 Taylor, Susan C. A2 Lim, Henry W. A2 Serrano, Ana Maria Anido SR Print(0) ID 1161549048 T1 Tuberous Sclerosis Complex T2 Taylor and Kelly's Dermatology for Skin of Color, 2e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 9780071805520 LK accessmedicine.mhmedical.com/content.aspx?aid=1161549048 RD 2024/04/20 AB KEY POINTSTuberous sclerosis complex (TSC) is an autosomal dominant disease characterized by generalized hamartoma formation in nearly every organ, with various manifestations occurring throughout the individual’s lifetime.Skin manifestations of TSC include angiofibromas, forehead plaques, hypomelanotic macules, shagreen patches, and ungual fibromas.Hypomelanotic macules are observed in more than 90% of patients with TSC and are evident at birth or during early infancy. More than three hypomelanotic macules are useful for the diagnosis of TSC in infant.Hypomelanotic macules are off-white in color and usually oval, polygonal, or ash leaf shaped, but sometimes appear as scattered numerous small white macules. Hypomelanotic macules present on the scalp, eyelashes, and eyebrows cause poliosis.The hypomelanotic macules in TSC have a normal number of melanocytes but decreased number and size of melanosomes.