Figure 1From: Automated quantification of Ki-67 proliferative index of excised neuroendocrine tumors of the lungTypical carcinoid. A. Typical carcinoid tumor with osseous metaplasia showing anastomosing nests and cords. No mitoses or necrosis are identified. B. Ki-67, 20x magnification, showing 4.6% tumor positivity by digital image analysis.Back to article page