PTAH -->
phosphotungstic acid haematoxylin
medical dictionary

A stain with broad application in cytology and histology; nuclei, mitochrondria, fibrin, neuroglial fibrils, and cross-striations of skeletal and cardiac muscle stain blue; cartilage ground substance, bone reticulum, and elastin appear in shades of yellow-orange and brownish red; also useful for demonstrating abnormal or diseased astrocytes, often in combination with periodic acid-Schiff stain and Luxol fast blue.

Synonyms: Mallory's phosphotungstic acid haematoxylin stain.

Acronym: PTAH

American spelling: phosphotungstic acid hematoxylin

(05 Mar 2000)