Clinical features of breast cancer--Anglo-Japanese comparative study.

A comparative study was undertaken at Guy's Hospital in the UK and the Aichi Cancer Center in Japan of the clinical picture of breast cancer in the UK and Japan. Target patients were 221 UK and 200 Japanese primary operable patients who were recruited from April 1979 through August 1980. No difference was seen between the two countries in the side and site of the lesion and the size of the lesion. The localized tenderness of the tumor site was higher in Japanese patients than in UK patients (25.5% vs 0%). Difference was observed in tumor characteristics: breast cancers of the UK patients were irregular, ill-defined, and not so mobile, whereas those of the Japanese patients were round or oval, well-defined, and mobile. Skin fixation was higher in Japanese patients (71.0% vs 44.8%). Clinical node involvement was higher in UK patients (32.5% vs 19.0%).