Severe axonal polyneuropathy after a FK506 overdosage in a lung transplant recipient.

FK506-induced polyneuropathies are rarely encountered. We report a case of axonal sensorimotor polyneuropathy in a lung transplant recipient that occurred during a FK506 overdosage. Onset was acute in the form of severe areflexic tetraparesis and resolution was observed after reduction of dosage. Because of increasing use of FK506 in solid organ transplantation, caution should be paid with FK506 dosage monitoring in cases of peripheral nervous system symptoms.

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