Roque's Trichrome
for Mallory Bodies


Weigert's iron hematoxylin or equivalent
Solution A
Phosphomolybdic acid 1 g
Distilled water 100 mL
Solution B
Aniline blue 0.5 g
Chromotrope 2R 2 g
Hydrochloric acid, 0.02N 100 mL
Dissolve the aniline blue in the acid with gentle heat.
Cool. Add the chromotrope 2R. Filter.

Tissue sample
3µ paraffin sections of neutral buffered formalin fixed liver are suitable. Other fixatives are likely to be satisfactory. Most trichrome stains benefit from picric acid or mercuric chloride fixation. Formalin fixed tissues may benefit from secondary fixation of sections in Bouin's fluid.


  1. Bring sections to water via xylene and ethanol.
  2. Stain nuclei with Weigert's iron hematoxylin or equivalent for 5 minutes.
  3. Wash in tap water to blue.
  4. Place into solution A for 2 minutes.
  5. Rinse with distilled water.
  6. Place into solution B for 8 minutes.
  7. Rinse with distilled water.
  8. Dehydrate with ethanol.
  9. Clear with xylene and mount with a resinous medium.

Expected results


Roque, Agustin L., (1953),
Chromotrope aniline blue method of staining Mallory bodies of Laennec's cirrhosis.
Laboratory Investigation, v. 2, no. 5, pp. 15-21.




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