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. Author manuscript; available in PMC: 2020 Sep 16.
Published in final edited form as: Breast Cancer Res Treat. 2018 Dec 12;174(2):315–324. doi: 10.1007/s10549-018-05084-w

Table 3.

Distribution of non-index lesions and occult cancers by laterality

Laterality Non-index lesions (n = 327) Non-index lesions with follow-up information (n = 306) Occult cancers (n = 87) Invasive occult cancers (n = 77) In situ occult cancers (n = 10)
Ipsilateral 133 124 51 (41%) 46 5
Ipsilateral node   42   41 15 (37%) 15 0
Contralateral 143 134 20(15%) 15 5
Contralateral node     9     7 1 (14%)   1 0

Data are no. of lesions (%) calculated for occult cancers relative to the total no. follow-up information (n = 306) for each laterality