Various literature describes the<unk>  as being "rare" or "extremely rare". There is no epidemiologic data available regarding how many individuals suffer from the<unk>  worldwide; however, there are approximately 200 cases described in medical literature.
Noonan syndrome with multiple lentigines
Multiple hamartoma syndrome
Hemihyperplasia–multiple lipomatosis syndrome
Sabinas brittle hair syndrome
Tuber cinereum hamartoma
Acorea, microphthalmia and cataract syndrome
Pure hair-nail type ectodermal dysplasia
Lenz microphthalmia syndrome