What type of polyp is this?

A polyp found in the transverse colon
WHAT IS YOUR ENDOSCOPIC DIAGNOSIS?

a) Tubular adenoma

You are half correct!

b) Tubulovillous adenoma

On the left side, the crypt's are slit-like rather than gyrate

c) Villous adenoma

VA's are soft like sea anenome !

d) Serrated polyp

No, the crypts are not large, round openings!

e) Malignant polyp

Yes, there are no crypts on the right-hand side !

explanation

Did you spot that cancer has developed on the right side of this tubular adenoma (TA). On the left side, the crypts are slit-like whilst on the right hand side, the crypt pattern has been destroyed (Kudo type V crypt pattern). The Haggitt stage was I and I took particular care in removing the polyp with a large margin. The cancer was only 4mm in diameter. Perhaps the smallest adenocarcinoma of the colon you will ever see ?