Case Report
Giant Hepatic Carcinoid: A Rare Tumor with a Favorable Prognosis
Table 1
Histopathological classification of neuroendocrine tumors.
| | Histological classification | Well-differentiated (low grade, G1) | Moderately differentiated (intermediate grade, G2) | Poorly differentiated (high grade, G3) |
| | Appearance | Monomorphic population of small round cells | Undefined | Cellular pleomorphism | | Prognosis | Prolonged survival | Intermediate | Poor | | Mitotic rate* | <2 | 2–20 | >20 | | Ki-67 index** | <3% | 3–20% | >20% | | Necrosis | Absent | Undefined | Present |
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Per 2 mm2; **percentage of tumor cells that immunolabel positively for Ki-67 antigen.
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