Which staining technique is particularly suited for highlighting elastic fibers?

• A. Gomori Aldehyde Fuchsin technique
• B. Gordon and Sweet's technique
• C. Verhoeff's Van Gieson technique
• D. Masson's Trichrome

Answer: (A)

Elastic fibers are best shown by stains that bind specifically to elastin. The Gomori aldehyde fuchsin method uses aldehyde fuchsin after an oxidation step to react with elastin, giving elastic fibers a strong dark purple–black color while the surrounding tissue stays lighter. This creates a high-contrast, crisp view of the elastic network, making it easy to assess integrity and pattern in vessels, lungs, skin, and other tissues rich in elastic fibers. Other stains focus on different components—Masson's Trichrome highlights collagen and muscle but not elastic fibers with the same clarity; Verhoeff's Van Gieson does emphasize elastic fibers but can be less consistent across tissues and is more complex to perform; Gordon and Sweet's technique targets other tissue components. So, the Gomori aldehyde fuchsin technique is the most specific and reliable for highlighting elastic fibers.