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Geoffrey Rolls

Geoffrey Rolls

BAppSc, FAIMS

Geoffrey Rolls is a Histology Consultant with decades of experience in the field. He is a former Senior Lecturer in histopathology in the Department of Laboratory Medicine, RMIT University in Melbourne, Australia.

Published Pieces by Geoffrey Rolls

Tutorials (Knowledge Pathway)

In this fourth part of the Fixation and Fixatives series, we look at some of the many popular and traditional fixative solutions that have been used in histology for the last 100 years. This part has an overview of proprietary solutions and...

Editorials (Knowledge Pathway)

As well as formaldehyde and glutaraldehyde, discussed previously, a number of other reagents have been used for fixation, sometimes in simple solution but often combined with other agents in the form of compound fixatives. The more important of these are...

Tutorials (Knowledge Pathway)

In this final part of the Fixation and Fixatives series, we look at practical ways to optimize fixation quality, discuss how heat effects fixation, and finish with an introduction to the relatively new field of microwave fixation.

Tutorials (Knowledge Pathway)

Routine (or H&E) and special stains allow us to visualize otherwise transparent tissue under a microscope and are critical for tissue-based diagnosis.

Editorials (Knowledge Pathway)

This second part of the Fixation and Fixatives series covers the factors that influence the rate and effectiveness of tissue fixation as well as looking at two common fixatives: formaldehyde (histology) and glutaraldehyde (ultrastructural electron microscopy...

Training Resources (Knowledge Pathway)

An introduction to the preparation of specimens for microscopy in the histopathology laboratory.

Training Resources (Knowledge Pathway)

From time to time, in all histopathology laboratories, paraffin blocks will be encountered that are difficult or even impossible to section.

Training Resources (Knowledge Pathway)

This straightforward guide to good histology practice provides practical advice on best-practice techniques and simple ways to avoid common errors.