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The page below is a sample from the LabCE course Histology Special Stains: Connective Tissue. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

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Phosphotungstic Acid-Hematoxylin (PTAH) Stain - Diagnostic Applications

Phosphotungstic Acid-Hematoxylin (PTAH), like other trichrome stains, demonstrates and differentiates collagen and muscle. It is especially preferred for the demonstration of cross-striations of skeletal muscle, which may be lost in certain muscle diseases. These muscle cross-striations are also found in tumors of muscle origin and rhabdomyosarcomas.