NewsNovo

Misdiagnosed as Metastatic Brain Cancer, a Spanish Man's Brain Lesions Proved to Be Live Tapeworm Larvae

6/30/2026

A 60-year-old man in Castellón, Spain, presented with two weeks of progressive headaches and mild behavioral changes; CT scans showed multiple lesions so closely resembling metastatic tumors that physicians suspected advanced cancer.

Exhaustive oncology testing found no malignancy anywhere in his body, and a detailed MRI followed by blood work confirmed neurocysticercosis — a parasitic infection of the central nervous system caused by the pork tapeworm Taenia solium.

The case, published in the CDC journal Emerging Infectious Diseases, makes a pointed argument for clinicians in non-endemic countries: a brain lesion that looks like cancer is not always cancer.

A Diagnosis Nobody Expected in a Man Who Had Never Left Spain The patient was a lifelong resident of Castellón with no history of travel to any region where neurocysticercosis is endemic.

Keep reading

Read the full story

Open on NewsNovo