Add the necessary commas to make complete sentence,

Abdomen showed extensive scarring scaphoid appearance no masses or organomegaly no tenderness and normal bowel sounds.

You add the commas where you think they need to be, and I'll check your work.

https://owl.purdue.edu/owl/general_writing/punctuation/commas/extended_rules_for_commas.html

To add the necessary commas and make the sentence complete, you would need to place commas after each distinct piece of information. Here's the revised sentence with the commas included:

"Abdomen showed extensive scarring, scaphoid appearance, no masses or organomegaly, no tenderness, and normal bowel sounds."

By adding commas, we separate each item in the list, making it easier to read and understand.