Table 5.
Areas of study | Outstanding questions |
---|---|
Mitotic rate | 10 HPFs versus 2 mm2 |
Ki-67 labeling index (LI) | Useful in the distinction of WD-NEC versus MD-NEC? Useful in the distinction of MD-NEC vs LC-NEC? |
Molecular pathology | NECs of the head and neck represent a nosologic spectrum or distinctive entities? NECs of the head and neck similar to NETs of other organs? |
Classification | Diagnostic criteria for combined/mixed neuroendocrine-non-neuroendocrine carcinomas |
HPV-associated NECs | Different molecular pathways abnormalities than non-HPV NECs? |