What is an effective technique for obtaining tissue for pathological analysis from a broad-based luminal punctal/canalicular mass?

If there is enough representative tissue outside of the punctum/canaliculus proper, then it can be incised sharply like any other marginal lesion (I prefer a 15-blade and Westcott scissors). If the pathology is limited to the lumen, then a modified punctoplasty could be considered. Dilate the punctum, grasp with toothed forceps, make an incision of the length felt necessary for obtaining a representative specimen with Westcott scissors or an 11-blade, then make a second incision to detach the sp...