Variants of Gleason Pattern 4 (part 2)

 

Fused glands

Chains of glands forming a maze-like pattern with scalloped borders. Multiple glands are merged with each other without intervening stroma.

Fused glands with scalloped borders (red arrows). Strips of stroma between the chains of glands (yellow arrow). 

 

 

Fused glands with scalloped borders (red arrows). Strips of stroma between the chains of glands (yellow arrow).