periodic acid-Schiff

Also found in: Acronyms.

per·i·od·ic acid-Schiff

adj. Abbr. PAS
Of, relating to, or being a reaction that tests for polysaccharides and related substances through the treatment of tissue sections with periodic acid stain and Schiff's reagent.
References in periodicals archive ?
Periodic acid-Schiff test, done on only selected patients, was mostly negative.
AOTA: American Occupational Therapy Association; DLSO: Distal lateral subungual onychomycosis; FDA: Food and Drug Administration; Nd: YAG: Neodymium:Yttrium Aluminum Garnet (laser); OSI: Onychomycosis severity index; PAS: Periodic Acid-Schiff stain; PCR: Polymerase Chain Reaction; PWSO: Proximal white subungual onychomycosis; RCT: Randomised Controlled Trial; SWO: Superficial white onychomycosis; TDO: Total dystrophic onychomycosis.
C) Neutral apical mucins in the gastric corpus with intense periodic acid-Schiff positivity (x200).
The commonly used fungal stains are: Gomori methenamine silver (GMS), Periodic acid-Schiff (PAS), Gridley's method and Mucicarmine.
b) Scattered amorphous solid eosinophilic globules, periodic acid-Schiff (PAS) stain.
Acid-fast bacilli and periodic acid-Schiff stains were negative.
Periodic acid-Schiff stains demonstrated occasional yeast cells thought to be Pityrosporum.
Staining procedures that allow a better visualization of the sporangia with the endospores (morula) include periodic acid-Schiff (PAS) and Gomori (2).
The technique of periodic acid-Schiff (PAS) was applied to identify cells secreting glycoproteins and to detect simultaneously the neutral mucopolysaccharides in goblet cells (blushing neutral glycoconjugates).
Higher magnification shows fungal elements with septate, branching hyphal forms which stain positively with traditional fungal stains such as Grocott-Gomori's methenamine silver (GMS) and Periodic acid-Schiff (PAS).
The blasts were myeloperoxidase (MPO)-positive, and periodic acid-Schiff (PAS)-negative.
A pathological evaluation of the biopsy taken from the inguinal lymph nodes showed noncaseating necrotizing granulomas which were positive for CD3 and CD20, but negative for CD30, periodic acid-Schiff (PAS), and angiotensin II receptor blockers (ARBs).

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