the GASTROLAB Image Gallery

Colon - the Large Bowel

Normal Valvula Bauchini

This is a normal valvula Bauchini. Usually it is possible to go into the terminal ileum with the colonoscope.


High resolution image: Hepatic flexure

Melanosis coli

This typical pigmentation of the colon mucosa is seen in the laxative abuse syndrome. The patient has usually for years used vast amounts of laxatives. The pigmentation is usually maximal in the distal parts of the bowel. This picture is however from the caecum.

These are not polyps!

No, these are not polyps. The finding in these pictures are red whortleberries, a popular kind of berry in Finland. The patient had eaten these four days earlier.


... neither are these

Asacol-tablets used in the treatment of ulcerative colitis, here found in the caecum

... and a slow release potassium tablet

Normal Appendix in the Caecum

Well, when you have seen this, you know, that you have seen everything in the colon. When appendix is identified, all of the colon has been investigated.


A tapeworm in the caecum and colon ascendens

Every textbook propose that this is a very common finding in Finland. It is not. At least any more.


Normal transversum

The transversal part of colon has a triangular configuration clearly seen in these pictures.


Diverticular disease in the Sigmoid Colon

A very common finding in the sigmoid colon, diverticular disease, often not causing much symptoms.


High resolution image: Colon Cancer (Adenocarcinoma, in the transverse colon)


Colon cancer

Colon Cancer is the most important gastrointestinal cancer, with a high and rising incidence in the developed world. The yearly incidence in USA is about 50 new cases per 100.000, in Finland slightly above 20. The main symptom is occult or manifest bleeding, changed bowel habits and anaemia. Colonoscopy is the diagnostic method of choice, and should always be done in elderly patients with bleeding or unexplained iron deficiency anaemia. Surgical treatment if possible is curative, radiation and medical therapy are palliative.

An Anatomic Orientation:


Colon: Caecum, Ascending Colon, Hepatic Flexure, Transverse Colon, Splenic Flexure (Flexura Lienalis), Descending Colon, Sigmoid Colon - and then the Rectum.