Congenital absence of the lacrimal puncta and salivary glands means a baby is born without one or both tiny tear openings on the eyelid edge (the lacrimal ...

Aplasia of Lacrimal and Salivary Glands (ALSG) is a rare, inherited condition where the tear-making glands near the eyes (lacrimal glands) and the ...

Aural atresia means the ear canal is not open. In many babies, the ear canal did not form normally before birth (this is called congenital aural atresia). In ...

Anotia means a baby is born without the outer ear (the visible ear on the side of the head). It is the most severe end of the “microtia–anotia” spectrum: ...

Total anodontia of the permanent and deciduous (baby) teeth means a person is born without any natural teeth at all—no primary (baby) teeth and no permanent ...

Oligodontia means being born without six or more permanent teeth (not counting wisdom teeth). It sits on the severe end of the “tooth agenesis” spectrum (few ...

Hypodontia means that one or more teeth never develop. It is a developmental condition—those teeth are absent from birth rather than lost later. Dentists ...

Tooth agenesis means one or more teeth never formed from birth. It ranges from hypodontia (1–5 missing permanent teeth, excluding wisdom teeth), to oligodontia ...

Developmental absence of tooth means one or more teeth never form at all during early development. This is different from teeth that were present and later ...

Complete absence of teeth means a person has no natural teeth at all. The baby teeth never develop, and the adult teeth never develop either. Dentists call ...

Anodontia means a person is born without any teeth at all. It is the most severe form of tooth agenesis, which is a developmental problem where teeth fail to ...

Ameloonychohypohidrotic syndrome is an extremely rare condition that affects structures that come from the body’s outer layer (the ectoderm)—especially tooth ...

KLK4 amelogenesis imperfecta (AI) is a genetic enamel disorder caused by harmful changes (variants) in the KLK4 gene. The KLK4 gene makes an enzyme ...

Amelogenesis imperfecta (AI), pigmented hypomaturation type 1 is a genetic enamel problem. Enamel is the hard, white outer layer of the tooth. In this type of ...

Amelogenesis imperfecta (AI) is a group of inherited conditions where tooth enamel does not form or harden in the normal way. When AI is caused by a change ...

Amelogenesis imperfecta type 2A1 is a rare genetic condition that affects the hard outer covering of teeth, called enamel. In this condition, the enamel looks ...

Hypomaturation amelogenesis imperfecta is a genetic tooth-enamel disorder. In this condition, the tooth builds a normal-thickness enamel layer during early ...

Amelogenesis imperfecta type 2 is a genetic enamel formation problem that mainly affects the maturation stage of enamel. Your enamel is the hard, shiny outer ...

Enamel-renal-gingival syndrome is a rare inherited condition that affects the teeth, the kidneys, and the gums. Children are born with a gene change (they ...

Enamel-renal syndrome is a very rare genetic condition. It affects the teeth and the kidneys at the same time. In the teeth, the hard outer layer (enamel) is ...