Human Phenotype Ontology 
Grandparent Node:
Abnormality of male external genitalia (HP:0000032)help
Parent Node:
Abnormal testis morphology (HP:0000035)help
..Starting node
Monorchism (HP:0030868)help
Term ID: 30868
Name: Monorchism
Synonym: Monorchidism
Definition: Having only one testis in the scrotum.
Reference: HP:0030868
Genes and Diseases:
       Child Nodes:

 Sister Nodes: 
..expandAbnormality of the Leydig cells (HP:0010789) help
..expandAbnormality of the testis size (HP:0045058) help
..expandAnorchism (HP:0030869) help
..expandCryptorchidism (HP:0000028) help
..expandDysplastic testes (HP:0008733) help
..expandHydrocele testis (HP:0000034) help
..expandIntratesticular abscess (HP:0025038) help
..expandOrchitis (HP:0100796) help
..expandPrimary testicular failure (HP:0008720) help
..expandRetractile testis (HP:0012646) help
..expandSupernumerary testes (HP:0010470) help
..expandTesticular atrophy (HP:0000029) help
..expandTesticular dysgenesis (HP:0008715) help
..expandTesticular fibrosis (HP:0012860) help
..expandTesticular lipomatosis (HP:0025476) help
..expandTesticular microlithiasis (HP:0012215) help
..expandTesticular neoplasm (HP:0010788) help
..expandTesticular torsion (HP:0100813) help
..expandVanishing testis (HP:0012870) help
InputHPO IDHPO termDistanceGeneGene id entrezHGNC IDDiseaseIdDiseaseNameFrequencyOnsetHGMD variantsClinVar variants
HPO disease - gene - phenotype typical associations:
HPO disease - gene - phenotype less frequent non-typical associations:
HP:0030868HP:0030868Monorchism0TCTN3 CL E G H2612324519ORPHA:2753Orofaciodigital syndrome type 4HP:0040281 - Very frequent31

Genes (1) :TCTN3

Diseases (1) :ORPHA:2753

Human Phenotype Ontology(HPO) is developed by the Human Phenotype Ontology Consortium. The version used here is December 15 2022 release.