Human Phenotype Ontology 
Grandparent Node:
Anonychia (HP:0001798)help
Parent Node:
Absent fingernail (HP:0001817)help
..Starting node
Absent thumbnail (HP:0012554)help
Term ID: 12554
Name: Absent thumbnail
Definition: Absence of thumb nail.
Reference: HP:0012554
Genes and Diseases:
       Child Nodes:

 Sister Nodes: 
..expandAbsent fifth fingernail (HP:0200104) help
InputHPO IDHPO termDistanceGeneGene id entrezDiseaseIdDiseaseNameDiseaseMIMConceptIDSourceTypical associationHGMD variantsClinVar variantsHGNC IDGeneMIM
HPO disease - gene - phenotype typical associations:
HPO disease - gene - phenotype less frequent non-typical associations:
HP:0012554HP:0012554Absent thumbnail0ATP6V1B2 CL E G H52679499ORPHA0118854606939
HP:0012554HP:0012554Absent thumbnail0ATP6V1B2 CL E G H52679499ORPHA0115854606939

Genes (1) :ATP6V1B2

Diseases (1) :79499

Human Phenotype Ontology(HPO) is developed by the Human Phenotype Ontology Consortium. The version used here is August 2021 release.