TY - JOUR
AU - Douglas‐Jones, A G
AB -  Sir : I was intrigued by the application of the Perspex measuring ball for histological measurement advocated by Mathers and Shrimankar with which I was previously unfamiliar. As they point out, measurements from glass slides are increasingly required as part of the minimum dataset for many tumours. Measurement of size, depth of invasion and a variety of margins may have to be made on multiple sections in order to determine the greatest extent or smallest margin, and this can be very time‐consuming using traditional methodologies. The Breast EQA Scheme has highlighted the difficulties of interobserver variation associated with histological measurement. For more years than I care to divulge, I have used a low‐power dissecting microscope as an invaluable adjunct in routine histopathological reporting. The dissecting microscope has a flat illuminated stage without slide carrier and a zoom facility allowing magnification, typically between × 2 and × 4 ( Figure 1a ). This means that the whole slide can be viewed and easily rotated in two dimensions and histological measurements can be made directly using a cheap Perspex ruler ( Figure 1b ). Like the Perspex measuring ball, the use of a dissecting microscope allows rapid assessment of dataset 
TI - Measurement in histopathology
JO - Histopathology
DO - 10.1111/j.1365-2559.2004.01828.x
DA - 2004-07-01
UR - https://www.deepdyve.com/lp/wiley/measurement-in-histopathology-mBHw5hrAgA
SP - 88
VL - 45
IS - 1
DP - DeepDyve
ER -