great Q! No minimum quant per say
I report any %, as long as it is def chorio (syncytios admixed cytotrophs; often assoc w/hemm).
fortunately, per this paper limited chorio (<5%) likely not prognostic anyhow, but for completeness and to correlate with serum HCG I report any
This is as good an example of Crooke hyaline change as you'll ever see, from a patient with Cushing's disease. Note the concentric rings on CAM 5.2. #pathology#neuropath#PathTwitter