Correlation of tumor volume and surface area with lymph node status in patients with multifocal/multicentric breast carcinoma

Multicentric breast carcinomas have a higher frequency of axillary lymph node metastasis than unifocal tumors of similar stage. It remains unclear whether this merely reflects larger tumor volumes or a different biologic behavior. The authors have shown previously that when aggregate tumor diameter are used for staging, unifocal and multifocal tumors have a similar frequency of axillary lymph node metastasis. However, summing diameter overestimates actual tumor volume because volume is proportional to the third power of the diameter. Therefore, the aim of the current study was to reanalyze the relation between size and axillary lymph node status by correcting for tumor volumes and surface areas.

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