[Histonet] Differentiating between carcinoid & other neuroendocrine tumours

[Fearn Tony]

We're trying to differentiate between a carcinoid tumour and other
neuroendocrine tumours. Grimelius, chromogranin & synaptophysin are positive
and we need to be more specific as to the type of tumour, with very little
tissue left in the block! I've been told staining for argentaffin granules
would be best, but does anyone know which method is the best to go for?
Thanks, in advance, for your help.
Lesley