乳腺癌多见于40岁以上，发生在30岁以下者较少见。我科1958年1月至1983年12月共收治30岁以下女性乳腺癌52例，现将其临床特点和治疗结果进行分析，并探讨有关预后因素。1材料与方法本组已婚者48例，未婚者4例。已婚者中5例未育，有一次以上妊娠或生育史者43例，占全组的82.7％ Breast cancer is more common in people over the age of 40, and less frequently occurs in people under the age of 30. In our department, from January 1958 to December 1983, a total of 52 women with breast cancer under the age of 30 were treated and their clinical features and treatment outcomes were analyzed and the prognostic factors were discussed. 1Materials and Methods 48 patients were married and 4 were unmarried. Among the married patients, 5 cases were not bred, 43 cases had more than one pregnancy or birth history, accounting for 82.7% of the entire group.