Pit Pattern Classification in Colonoscopy
A short introduction
Colon cancer – some facts
American cancer society in the U.S. third most common cancer type among males fourth most common cancer type among females
risk increasing factors such as lifestyle
obesity, eating fat-high, smoking, alcohol, ...
also medical history of family and genetic inheritance
Colonoscopy (1)
regular colon examination important (especially for people of an age of 50+ years)
Colonoscopy best currently available test to detect abnormalities
within the colon done by using a so-called colonoscope
flexible, lighted instrument possibility to take pictures during colonoscopy
magnifying colonoscope up to 150-fold magnification more details get uncovered
Colonoscopy (2)
diagnosis is based on some sort of classification or staging such asDuke staging systemDuke‘s modified staging systemTNM staging systemPit pattern classification
stage important for physician to choose the right treatment
Pit pattern classification (1)
classification scheme developed by Kudo et al. based on the pit patterns of the colonic mucosa differentiation between 5 types of pit patterns:
Type I to type V Type III has sub types III-S and III-L Type I and II are benign while type III to V are
malignant tumorous lesion
Pit pattern classification (2)
different pit pattern types
Pit pattern classification (3)
characteristics of the different pit pattern types
Pit pattern type Characteristics
I roundish pits
II stellar or papillary pits
III S small roundish or tubular pits (smaller than type I pits)
III L large roundish or tubular pits (larger than type I pits)
IV branch-like or gyrus-like pits
V non-structured pits
Pit pattern classification (4)
but in real life classification is not really that easy
Pit pattern – Type I
Pit pattern – Type II
Pit pattern – Type IIIS
Pit pattern – Type IIIL
Pit pattern – Type IV
Pit pattern – Type V