- Precocious puberty in males (HP:0008185): The onset of puberty before the age of 9 years in boys. Evidence: PCS. Onset: Childhood onset (HP:0011463). (PMID:7692306)
- Sex-limited expression (HP:0001470): Sex limitation is used to refer to a monogenic trait linked to an autosomal locus in which the phenotypic effects of allelic differences are expressed only in one sex. Evidence: PCS. (PMID:7692306)
- Decreased testicular size (HP:0008734): Reduced volume of the testicle (the male gonad). Evidence: TAS. (OMIM:176410)
These phenotypes are associated with the disease familial male-limited precocious puberty (OMIM:176410).