Fig. 2From: Locoregional recurrence via mucus-mediated extension following lung resection for mucinous tumors(a, b) The border between the tumor/mucus and the normal lung tissue is clear. A border is identified as an easily recognizable smooth surface, indicated by a dotted line. (c, d) The border between the tumor/mucus and normal lung tissue is not clear. Mucus is identified within air spaces in the normal lung parenchyma beyond the edge of the tumor (arrows)Back to article page