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PathologyOutlines.com
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PathologyOutlines.com is a free, no-registration site with a unique, comprehensive, regularly updated textbook of surgical and clinical pathology, providing useful professional content for practicing pathologists and lab personnel, in 15 seconds or less.
November 11, 2025 at 7:46 PM
(Image Quiz, Continued)

A. Cytoplasmic positivity for cytokeratin without significant reactivity for any other markers
B. Diffuse strong positivity for synaptophysin and INSM1
C. Loss of nuclear INI1 expression
D. Speckled nuclear positivity for NUT1

Answer linked in the comments.
November 11, 2025 at 7:39 PM
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