for Fibrin – Shorter Version
This version of the picro-Mallory is relatively uncomplicated and is suitable for a routine pathology laboratory. Proper fixation is still essential and minimalist formalin fixation with quick processing should be avoided as it will give disappointing results with poorly stained erythrocytes. Originally, extended mercury fixation, thorough processing, degreasing and refixing in picro-mercuric-ethanol were specified. Although fixation in formol sublimate (or B5) is preferred for this method as well, adequate results can be obtained with overnight formalin fixation and overnight processing. Refixation of sections in Bouin's fluid at 56°C for an hour or so overcomes some of the deficiencies in fixation, but results are still inferior to those obtained by the full procedure.
|An acid resistant nuclear stain, such as Weigert's iron hematoxylin,|
|or the celestine blue-hemalum sequence.|
|Acetic acid, glacial||1||mL|
|Acetic acid, glacial||2||mL|
3 mm slices of tissue should be fixed in formol sublimate (or B5) overnight. Paraffin process overnight. Avoid rapid fixation with formalin and short processing, as this produces tissues that stain poorly even with the secondary fixation specified. Sections should be 3-5 µ thick.
Culling C.F.A., (1974)
Handbook of histopathological and histochemical techniques Ed. 3
Butterworth, London, UK.
Last updated January 2019