Five oesophageal strictures ...

Here are 5 oesophageal strictures. 
HOW MANY SHOW A CANCER?

■ 1 photograph

Try again!

■ 2 photographs

YES! Well done!!!

■ 3 photographs

No, image C does look dodgy I admit but was benign...

■ 4 photographs

There are 4 dodgy looking strictures but not all 4 were malignant !

■ 5 photographs

One stricture (image D) definitely looks benign!

explanation

Actually there are 2 cancers in there (case A and E). In order the aetiologies of the strictures are:
A = Adenocarcinoma
B = Post radiotherapy stricture
C = Peptic stricture
D = Post ESD stricture
E = Squamous cell carcinoma