Tumour size

The longest primary tumour diameter was extracted in the majority of the cases (71%) from the pathology report, and if not specified in the pathology report, from the surgery or mammography report. Measurement of tumor size was generally done according to the TNM recommendations (1), and only the size of the invasive component was recorded.

The following options were added to the website drop-down list:

0.1-0.5 cm
0.6-1.0 cm
1.1-2.0 cm
2.1-5.0 cm
>5.0 cm

and, in addition,

0.1-1.0 cm
> 1.0 cm

0.1-2.0 cm
>20 mm

not available = missing data or size could not be assessed

1. TNM Classification of Malignant Tumours, fifth edition, L.H. Sobin and C. Wittekind (Eds), John Wiley & Sons, Inc., New York, 1997, pp. 227.