There’s no good place for parasitic worms to wreak havoc in the human body.

But Gizmodo reports an 80-year-old patient in India developed a particularly unfortunate case.

The man’s worm infection left him with a massively swollen, calcified right testicle.

The man had visited the doctor complaining of blood in his urine. It's a common sign of a urinary tract infection.

But when examined, doctors spotted that he had a “grossly enlarged” right testicle next to his normal left testicle.

Doctors suspected that the man had been infested by a species of filarial worm, which are thread-like nematodes.

These worms are spread to people as larva via mosquito bite, then migrate to the lymph nodes scattered across the body.

Lymphatic filariasis is endemic in India.

According to the World Health Organization, nearly 900 million people in 49 countries are in need of preventive treatment.

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