双侧原发性乳腺癌100例临床分析

背景与目的:目前研究表明已患乳腺癌的妇女发生对侧乳腺癌的危险性明显增加,本文中我们分析双侧乳腺癌的临床特征,探讨双侧乳腺癌发生的危险因素。方法:对100例双侧乳腺癌患者与200例单侧乳腺癌患者行病例对照研究。结果:双侧乳腺癌组发病年龄及初潮年龄均比单侧乳腺癌组早,且有显著性差异(P<0.05)。双侧乳腺癌组与单侧乳腺癌组相比,有明显的乳腺癌家族史,阳性率分别为15%和5%(P<0.01),且多于绝经前发病(70%和58%)(P<0.05)。相同T分期的双侧乳腺癌组第一原发癌与单侧乳腺癌组相比,同侧腋淋巴结阳性率无显著性差异。异时性双侧乳腺癌组第一癌术后放疗与单侧乳腺癌组术后放疗比率分别为69%、58%,二者无显著性差异(P>0.05)。结论:双侧乳腺癌患者与单侧乳腺癌患者相比,前者有明显的乳腺癌家族史,发病年龄呈年轻化趋势,且雌激素与双侧乳腺癌的发生可能有更密切的关系。双侧乳腺癌的第一原发癌与单侧乳腺癌的腋淋巴结转移率相似,提示它们的某些生物学行为也相似。

Clinical characteristics of bilateral primary breast cancer: a report of 100 cases

BACKGROUND & OBJECTIVE: Women with breast cancer have an increased risk of new primary tumors of the contralateral breast. This study was to analyze the clinical characteristics of bilateral primary breast cancer (BPBC), and explore risk factors of BPBC. METHODS: Clinical data of 100 patients with BPBC and 200 patients with unilateral primary breast cancer (UPBC) were compared. RESULTS: The age of disease and age of menarche of BPBC patients were significantly younger than those of UPBC patients (P<0.05). Compared with UPBC patients, BPBC patients had a significantly greater prevalence of family history (15% vs. 5%, P<0.01); incidence rate of breast cancer before menopause was significantly higher in BPBC patients than in UPBC patients (70% vs. 58%, P<0.05). Pathologically positive rate of ipsilateral axillary lymph nodes was not significantly different between the 2 groups. The radiation treatment proportion in metachronous BPBC patients was not significantly different from that in UPBC patients (69% vs. 58%, P>0.05). CONCLUSIONS: Compare with UPBC patients, BPBC patients have a significantly greater prevalence of family history, and are younger. The estrogen might be closely related to BPBC, but the lymphatic metastasis ability of the first tumor in BPBC is similar to that of UPBC.