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Jun 29, 2026

Doctors thought man had deadly brain cancer — the reality was much grosser

Man's 'deadly brain cancer' turns out to be something grosser Email New York Post Read the Latest on Page Six

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Doctors thought man had deadly brain cancer — the reality was much grosser

By Rachel Sacks Published June 29, 2026, 10:11 a.m. ET

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Talk about a wriggly situation.

When a man in Spain went to the hospital with chronic headaches, brain scans showed poorly defined lesions, or tissue where the edges are blurred due to abnormal cell growth.

Doctors believed all signs were pointing to deadly cancer that had spread — until they took a closer look. The good news? He could be cured. The bad news? The real problem would make most people squirm.

CT scan of a human brain with cerebral cysticercosis, showing calcified lesions from pork tapeworm larvae and hydrocephalus. 3
Doctors initially though a man’s chronic headaches were signs of a deadly brain cancer, but the reality was much grosser. Creative Endeavors – stock.adobe.com

After an initial scan, the medical team performed a higher-resolution MRI to determine the location of any tumors.

While no tumors were present, a different kind of specimen was — pork tapeworm larvae.

Published in the journal Emerging Infectious Diseases, the report confirmed the parasitic infection with a blood test specific to Taenia solium, despite the 60-year-old Castellón native having never traveled abroad.

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The parasite enters the human body when larval eggs are swallowed, and they burrow into the gut and form fluid-filled cysts.

The eggs can then develop into adult tapeworms in a human’s gut. The process usually takes around 5 to 12 weeks.

The cysts can travel anywhere in the body, and can infiltrate and calcify in soft tissue.

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