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A 68-year-old man, who had suffered a tick bite one week previously, consulted his home doctor because of fever and an erythematous rash around the bite scar. He underwent a skin biopsy, and Borrelia garinii was detected, from which
Lyme disease was diagnosed. He received amoxicillin for two weeks and his symptoms disappeared. After 6 months he noticed swelling of his cervical, axillary and inguinal lymph nodes. A biopsy sample was taken from a left cervical lymph node, and this revealed angioimmunoblastic T-cell lymphoma. The patient achieved a complete remission after chemotherapy. The relationship between
Lyme disease and lymphoma is discussed.