Comparison of the Subgross Distribution of the Lesions in Invasive Ductal and Lobular Carcinomas of the Breast: A Large-Format Histology Study
Table 1
Lesion distribution and disease extent in ductal and lobular breast carcinomas, Dalarna, Jan 2008–Jul 2012.
Ductal
Lobular
χ 2
test
Invasive component
Unifocal
63.3% (371/586)
27.8% (37/133)
Multifocal
35.5% (208/586)
45.9% (61/586)
Diffuse
1.2% (7/586)
26.3% (35/133)
Lesion distribution
In situ component*
Unifocal
42.8% (251/586)
18.8% (25/133)
Multifocal
25.1% (147/586)
69.2% (92/133)
Diffuse
28.8% (157/586)
6.8% (9/133)
Combined in situ + invasive components
Unifocal
41.6% (244/586)
15.0% (20/133)
Multifocal
31.6% (185/586)
54.2% (72/133)
Diffuse
26.8% (157/586)
30.8% (41/133)
Disease extent**
Nonextensive
54.1% (317/586)
33.8% (45/133)
Extensive
45.7% (268/586)
65.4% (87/133)
Total
586
133
719
*5.3% (31/586) of the ductal and 5.2% (7/133) of the lobular cases had no demonstrable in situ component. **The extent of the disease was not assessable in 0.2% (1/586) of the ductal and 0.8% (1/133) of the lobular cancers.
