Laboratory Services

Phosphotungstic Acid-Hematoxylin Stain

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Updated Test Information:

Test Description
Phosphotungstic Acid-Hematoxylin Stain
Synonym(s)

PTAH

Test ID

PTAH

Specimen Type

Formalin-fixed, paraffin-embedded tissue blocks (FFPE). If tissue blocks are not available, unstained slides are acceptable (please submit 1-2 slides per antibody to be tested, cuts must be 4 microns thick).

Specimen Collection / Processing Instructions

Tissue removed during a surgical procedure and placed in 10% NBF soon after removal from the patient. Appropriate tissue for requested staining.

Required Information

Complete the Incyte Diagnostics requisition with the patient's demographics and relevant clinical history.

Stability

Ambient: Indefinite

Unacceptable Specimen Conditions

Slides or paraffin blocks with no tissue remaining. Samples fixed in fixatives other than 10% neutral buffered formalin. Paraffin blocks that have been overheated or frozen.

Department (code)

Histology

Methodology

Special Stain, Manual

Estimated TAT

12 business days from receipt

Testing Schedule

Monday–Saturday

Retention

Blocks:10 years
Slides: 10 years

CPT Code(s)

88313