<unk> ing demonstrating contraction band necrosis in an individual that had a myocardial infarction (heart attack).<unk> <unk><unk>  (PTAH) is a mix of<unk>  with<unk> <unk> , used in histology for staining. It stains some tissue in contrasting colors in a way similar to<unk>  and eosin stain, as<unk> <unk>  binds to tissue proteins. It is used to show gliosis in the central nervous system, tumours of skeletal muscles, and fibrin deposits in lesions. Muscle is stained blue-black to dark brown, connective tissue is pale orange-pink to brownish red, fibrin and neuroglia stain deep blue, coarse elastic fibers show as purple, and bone and cartilage obtain yellowish to brownish red color. PTAH is ideal for demonstrating striated muscle fibers and mitochondria, often without a counterstain. As such, it is used to identify contraction bands, as seen in contraction band necrosis.<unk> s ependymomas while it does not stain choroid plexus papillomas, providing one means of differentiating these tumors. This technique has been largely replaced by immunohistochemistry techniques.
Phosphotungstic acid-haematoxylin stain
Auramine phenol stain
Leishman stain
Grocott's methenamine silver stain
Giemsa stain
PAS diastase stain
Feulgen stain
Romanowsky stain