A German man, who weighed 507 pounds and was too heavy to receive an X-ray at a clinic, has died of unknown causes, Agence France-Presse reported.

Thomas Lessman was told to go to the zoo for an X-ray because he was too heavy for machines designed for humans.

Complaining he was feeling ill and frequently losing consciousness, Lessmann, 51, went to a clinic in Eppendorf, near Hamburg, Germany He was referred to the nearby Hagenbeck Zoo for an X-ray, but refused to get one there.

"It sounded like they were trying to wind us up," Lessmann's widow Petra told Bild newspaper of the clinic.

A spokeswoman for the clinic said its X-ray machines could not accommodate anyone weighing more than 440 pounds.

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