Human Phenotype Ontology 
Grandparent Node:
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Abnormal axial skeleton morphology (HP:0009121)help
Grandparent Node:
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Abnormality of the head (HP:0000234)help
Parent Node:
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Abnormal skull morphology (HP:0000929)help
..Starting node
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Abnormal mastoid morphology (HP:0000264)help
Term ID: 264
Name: Abnormal mastoid morphology
Synonym: Abnormality of mastoid process of temporal bone; Abnormality of the mastoid
Definition: An abnormality of the mastoid process, which is the conical prominence projecting from the undersurface of the mastoid portion of the temporal bone.
Comments:
Reference: HP:0000264
Genes and Diseases: SELECT DISTINCT 'HP:0000264' AS Input, t2.acc as HPO_ID, t2.name as HPO_term, g.Distance, t1.Entrez_gene AS Gene, t1.Entrez_gene_id AS Gene_id_entrez, t1.HGNC_ID, t1.DiseaseId, t1.DiseaseName, t1.Frequency, t1.Onset #, t1.ConceptID, Source, t1.Typical_association , h.Variants AS HGMD_variants, c.variants AS ClinVar_variants FROM hpo202212.graph_path AS g, hpo202212.term AS t, hpo202212.term AS t2 LEFT JOIN hpo202212.hpo_phenotype_to_genes as t1 ON (t1.HPO = t2.acc) LEFT JOIN gb_exome.clinvar_variation_latest_sum AS c ON ( c.Gene = t1.Entrez_Gene) LEFT JOIN gb_exome.hgmd_allmumt_sum_latest AS h ON (h.gene = t1.Entrez_Gene ) WHERE (t.acc ='HP:0000264' AND g.term1_id = t.id AND g.distance <=20 AND t2.id = g.term2_id) order by g.distance, gene, DiseaseName;