Nature's Daft Bonus: The Extra Testicle
Category: Human Anatomy 23rd July 2026
Picture this: a man goes for a routine groin scan or tumbles into surgery for something mundane, and the surgeon blinks and says, rather calmly, 'You have another one.' No one rehearses for that line. The condition is called polyorchidism - literally 'many testes' - and the commonest form is triorchidism, where a gentleman carries three rather than the usual two.
It is absurdly rare. Doctors have catalogued only a few hundred cases over the centuries, so it's not as if your local gym is overflowing with spares. Embryologically it happens because the genital ridge splits during early development, creating an extra little factory that produces testicular tissue. The extra testicle tends to be on the left side more often than the right, which is nature's idea of asymmetry and theatre.
Most of the time the spare organ behaves itself: it sits quietly in the scrotum or sometimes hides out in the inguinal canal, produces hormones, and gets on with life without demanding a pension. Problems arise when it decides to be dramatic - torsion (it twists), undescended testicles, or, very rarely, tumours. Because of these risks surgeons sometimes remove the odd one, or monitor it with scans. Management is a patient-by-patient decision, not a one-size-fits-all edict from a man in scrubs.
There is a certain dark comedy to it. Imagine being told you have an unexpected part and then having to explain that to your partner, your GP, or, God help you, a customs officer. I once read a report where the extra testicle was discovered only because of an unrelated car crash; it felt like finding a spare lug nut under the floor mat of a well-loved hatchback - pointless but oddly satisfying.
This is one of those human anatomy footnotes that proves evolution has a sense of humour and a loose workshop. Polyorchidism is real, usually harmless, sometimes troublesome, and always an excellent anecdote to break the ice at medical dinner parties. If you ever get the diagnosis, tell the doctor to be gentle - and perhaps skip the small talk about family plans.