The photo shows the same case presented in Image:Multiple Carcinoid Tumors of the Small Bowel 1.jpg and Image:Multiple Carcinoid Tumors of the Small Bowel 2.jpg.

The photo shows an extreme close-up of one of the carcinoids cut longitudinally. While partially respecting the mucosal architecture, the tumor demonstrates no reluctance to seep through the dark band of an apparently sieve-like muscularis propria to extensively involve the serosal connective tissues. This is a common growth pattern for carcinoids. Differential growth and/or contraction of the tumor on either side of the muscularis causes the latter to bow inward, as seen in the photo. In more pronounced cases, the bowel may actually show a "kink" readily visible externally.

The photos were taken with a Nikon FE2 and 50-something mm Nikkor macro lens with Elite ISO 100 daylight film and a blue color compensation filter.