CONGENITAL ABSENCE OF
Alternative titles; symbols
OS PENIS, CONGENITAL ABSENCE OF
Gilbert and Zevit (2001) pointed out that another genetic condition, affecting 100% of human males, is congenital lack of a baculum (os priapi; os penis).
Whereas most mammals (including common species such as dogs and mice)
and most other primates (except spider monkeys) have a penile bone, human males lack this bone and must rely on fluid hydraulics to maintain erections.