In Masson Trichrome staining, muscle appears grey instead of red. Which action would correct this?

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Multiple Choice

In Masson Trichrome staining, muscle appears grey instead of red. Which action would correct this?

Masson Trichrome gets its bright red muscle color from the red dye components in the staining sequence. If those reagents have aged or degraded, their staining power fades and the muscle may appear grey because the red contrast is lost. Using fresh reagents restores the proper dye uptake and yields the expected red stain for muscle, with collagen and nuclei differentiating as intended. Other modifications won’t fix this issue because the underlying problem is dye potency and stability. Bouin’s mordant can alter staining patterns or introduce artifacts, and simply changing washing times won’t restore faded dyes. Fresh, properly prepared staining solutions ensure the colors develop correctly.

Masson Trichrome gets its bright red muscle color from the red dye components in the staining sequence. If those reagents have aged or degraded, their staining power fades and the muscle may appear grey because the red contrast is lost. Using fresh reagents restores the proper dye uptake and yields the expected red stain for muscle, with collagen and nuclei differentiating as intended.

Other modifications won’t fix this issue because the underlying problem is dye potency and stability. Bouin’s mordant can alter staining patterns or introduce artifacts, and simply changing washing times won’t restore faded dyes. Fresh, properly prepared staining solutions ensure the colors develop correctly.

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