Which control slide would best demonstrate collagen staining in connective tissue?

• A. Grocott's Methenamine Silver
• B. Masson's Trichrome
• C. Hematoxylin & Eosin
• D. Luxol Fast Blue

Answer: (B)

The stain that best highlights collagen in connective tissue uses a color-differentiating trichrome method, which makes collagen fibers stand out clearly from other components. In this approach, collagen typically shows up blue (or blue-green, depending on the protocol), while muscle and cytoplasm stain red and nuclei appear dark. This contrast lets you easily identify the amount and organization of collagen, making it ideal for assessing connective tissue structure and fibrosis. The other stains don’t target collagen specifically: Grocott’s methenamine silver highlights fungal organisms and certain basement membranes; Hematoxylin and eosin provides a general view with nuclei blue and cytoplasm pink but doesn’t distinguish collagen well; Luxol Fast Blue targets myelin in nervous tissue. So, Masson’s Trichrome is the best choice for demonstrating collagen staining.