최근 저자들은 1987년부터 1988년까지 2년간 영남 의대 부속 병원 외과에서 수술 및 병리 조직학적으로 확진된 다발성 원발성 악성 종양 6예를 경험하였기에 이를 연령, 발생 반도, 호발 장기, 유발 인자, 가족력 등을 분석함으로서 외과의에게 다발성 원발성 악성 종양에 대한 관심을 고조시키고자 문헌고찰과 함께 보고하는 바이다. 1. 평균 연령은 54.1세였으며 최저 38세부터 최고 67세였다. 2. 남자 3예, 여자 3예로 남녀비는 1 : 1 이었으며 발생 빈도는 0.31%였다. 3. 호발부위는 위암, 유방암, 대장암 순이었으며 이 중 1예는 초기위암 및 초기 대장암이었으며 위암과 다발성 골수종을 동반한 예도 1예 있었다. 4. 면역 검사는 DNCB, CMI, T4/T8 ratio를 측정하였으나 현저하게 면역 저하된 경우는 없었다. 5. 가족력은 1예로서 17%였으며 위암이었다.

Though the occurrence of multiple primary malignant tumor is a rare finding but the reported cases of it has increased in recent years. We collected multiple primary cancer of different organ, tissue and the multicentric origin of bilaterally paired organs. This paper reports 6 cases of multiple primary malignant tumors which were experienced at Yeungnam university hospital in Taegu during the past 2 years with review of journals. The results were as follows. 1. The incidence of multiple primary cancer was 0.31% for 2 years(1987-1988). 2. The ratio between male and female was 1:1 and mean age of incidence was 54.1 years. 3. The ratio between synchronous and metachronous(interval more than 6 months) was 1:1. 4. The time interval between first and second cancer was average 2.7 years in metachronous cases. 5. The most frequent involved organ was stomach, breast and colon in order of frequency. 6. The incidence of familial cancer associations was found in one out of 6 cases. 7. The test of DNCB, multitest CMI and ratio of T4 to T8 were performed in 4 cases but there was no definitive evidence of abnormality. We concluded that every effort should be made to discover the presence of synchronous malignancies in the patients who are being treated for a known tumor, and also special care should be given to detect new metachronous lesions is required.