Nail aplasia

Nail–patella syndrome is a genetic disorder that results in small, poorly developed nails and kneecaps, but can also affect many other areas of the body, such as the elbows, chest, and hips. The name "nail–patella" can be very misleading because the syndrome often affects many other areas of the body, including even the production of certain proteins. [Source: Wikipedia ]

May Be Caused by
Acro-fronto-facio-nasal dysostosis
Acrodysostosis
Acrogeria
Acromesomelic dysplasia
ADULT syndrome
Alves syndrome
Amniotic band syndrome
Anonychia-ectrodactyly syndrome
Antley-Bixler syndrome
Aplasia cutis congenita
Asphyxiating thoracic dysplasia
Brachymesophalangy-nail dysplasia
CHILD syndrome
Chondrodysplasia punctata brachytelephalangic type
Chondrodysplasia punctata Conradi-Hünermann type
Chondrodysplasia punctata X-linked dominant type
Chromosome 4 abnormality
Chromosome 8 abnormality
Chromosome 9 abnormality
Clouston syndrome
Coffin-Siris syndrome
Congenital curved nails
Cronkhite-Canada syndrome
DOOR syndrome
Double fingernails on fifth fingers
Dyskeratosis congenita
EEC syndrome
Ellis-van Creveld syndrome
Epidermolysis bullosa dystrophica
Eronen syndrome
Familial anonychia
Fetal alcohol syndrome
Fetal hydantoin syndrome
Fetal primidone syndrome
Fetal valproate syndrome
Fibrochondrogenesis
Fontaine-Farriaux syndrome
Fryns syndrome
Fuhrmann syndrome
Geleophysic dysplasia
Goltz syndrome
Hajdu-Cheney syndrome
Hallermann-Streiff syndrome
Hereditary ectodermal dysplasia
Hypothyroidism
Hypotrichosis-deafness syndrome
Incontinentia pigmenti
Iso-Kikuchi syndrome
Jadassohn-Lewandowsky syndrome
Kirghizian dermato-osteolysis
Larsen syndrome
Laryngoonychocutaneous syndrome
Lelis syndrome
LEOPARD syndrome
Limb-mammary syndrome
Mandibuloacral dysplasia
Marfan syndrome
Melnick-Needles osteodysplasty
Mesomelic dysplasia
Metaphyseal chondrodysplasia
Metaphyseal chondrodysplasia McKusick type
Monilethrix syndrome
Multiple synostosis syndrome
Nail pitting and alopecia
Nail-patella syndrome
Noonan syndrome
Olmsted syndrome
Oto-onycho-peroneal syndrome
Otopalatodigital syndrome type 1
Pallister-Hall syndrome
PIBIDS syndrome
Polyglandular autoimmune disease
Progeria
Pterygium syndrome
Pyknodysostosis
Rapp-Hodgkin syndrome
Roberts syndrome
Robinow syndrome
Rosselli-Gulienetti syndrome
Rothmund-Thomson syndrome
Rubinstein-Taybi syndrome
Schinzel-Giedion syndrome
Schopf-Schulz-Passarge syndrome
Sclerosteosis
Severe combined immune deficiency
Sézary syndrome
Short rib-polydactyly syndrome type 2
Sorsby syndrome
Sotos syndrome
Toluene embryopathy
Tonoki syndrome
Tricho-dento-osseous syndrome
Trichoodontoonychial dysplasia
Trichorhinophalangeal dysplasia type 1
Trichorhinophalangeal dysplasia type 2
Trichorrhexis nodosa syndrome
Triphalangeal thumb-onychodystrophy-deafness syndrome
Trisomy 13
Trisomy 18
Turner syndrome
Twenty-nail dystrophy and IgA deficiency
Warfarin embryopathy
Weaver syndrome
Williams syndrome
Witkop tooth-nail syndrome
Yellow nail syndrome
Yunis-Varon syndrome
Zimmermann-Laband syndrome