[Amoebic dysentery: a relapsing case by cancer chemotherapy]

A 71-year-old man was admitted with a diagnosis of amoebic dysentery. He received a tonsillectomy 2 years prior to admission because of squamous cell carcinoma and had been treated with 5-FU. Laboratory examination showed T-lymphocytopenia and the T4/T8 ratio was markedly reduced. He experienced amoebic dysentery during World War II some 40 years ago, thus, this case report suggested that amoebiasis relapsed by depressed cellular immunity and was calculated as one of the opportunistic infections.