<unk>  is a medical condition in which the nail beds of the fingers and toes are abnormally long and slender, specifically, a finger nail index of 1.30 or more, it is a common feature in people with connective tissue disorders, such as Ehlers–Danlos syndromes, Marfan syndrome, and hypohidrotic ectodermal dysplasia., it often appears alongside arachnodactyly and/or dolichostenomelia, which is the condition of having long and slender fingers and toes.
Dolichonychia
Steatopygia
Koilonychia
Trachonychia
Hapalonychia
Paraphrenia
Pachyonychia congenita
Cryptotia