Fig. 2 | Modern Pathology

Fig. 2

From: Stage IV lung carcinoids: spectrum and evolution of proliferation rate, focusing on variants with elevated proliferation indices

Fig. 2

Well-differentiated morphology characteristic of the majority of carcinoids with elevated proliferation rate. Liver metastasis (a–c) and ovarian metastasis (d–f) demonstrating nested/trabecular architecture and bland, monotonous plasmacytoid cytomorphology with low-nuclear/cytoplasmic ratios (a, d) but elevated mitotic counts (arrows) and Ki-67 of >20% in hot-spot areas (b, e) in the background of low-proliferative Ki-67 areas (c, f)

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