In comparison, exclusive N-FOXP1 expression was present only in 12.2% (5/41) of DCIS cases, while both N- and C-FOXP1 expression was observed in the majority of this group (34/41, 82.9%), and the remaining 2 cases (4.9%) revealed exclusive cytoplasmic labeling (Fig. 2). Here, FOXP1 is linked to ductal breast carcinoma in situ.