Tanner Genitalia Development Stage 4

**Semantic type:** Intellectual Product

**Definition:** The penis is significantly enlarged in length and circumference, with further development of the glans penis. The testes and scrotum continue to enlarge, and there is distinct darkening of the scrotal skin. This is difficult to evaluate on a black-and-white photograph.

**Synonyms:** - Tanner Genitalia Development Stage 4, Male - Tanner Genitalia Stage 4 - Tanner Genitalia Stage 4, Male - Tanner stage 4