Rare diseases · Sign or symptom
Agenesis of first permanent molar tooth
HP:0011056
What it means
Agenesis of either maxillary first permanent molar or mandibular first permanent molar or both.
Rare diseases that can present with this1
The range is how often this sign appears among people diagnosed with each disease — it is not a probability of having any of them. Many of these signs also occur in common, non-rare conditions. A sign on this page is a conversation to have with a clinician, not a conclusion.
Part of the broader category
Also called: Absence of first permanent molar · Absence of six year molar · Agenesis of six year molar · Failure of development of first permanent molar · Failure of development of six year molar · Missing first permanent molar · Missing six year molar
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Start free with EleplanThis page uses the Human Phenotype Ontology (2026-06-23) — Human Phenotype Ontology Consortium, hpo.jax.org. Disease associations from Orphanet (INSERM), CC BY 4.0. Content is educational and is not medical advice.