Lesson Summary

This lesson covers diagnostic applications of PAS staining.

Learning Objectives

• Identify PAS-positive structures.
• Understand diagnostic applications.

Content

Kidney

PAS highlights:

• Glomerular basement membranes
• Mesangial matrix
• Tubular basement membranes

Liver

PAS is useful for:

• Glycogen storage diseases
• Alpha-1 antitrypsin deficiency

Fungi

PAS demonstrates:

• Candida
• Histoplasma
• Blastomyces

Hematology

PAS assists in evaluation of:

• Acute lymphoblastic leukemia
• Erythroleukemia

Key Takeaway

PAS is one of the most versatile stains used in diagnostic pathology.