Which staining technique is most likely depicted in the image?

• A. Hematoxylin and eosin
• B. Movat
• C. Gram stain
• D. PAS

Answer: (B)

Movat pentachrome staining differentiates major tissue components in a single slide by using a combination of dyes that color collagen, muscle, elastic fibers, mucin, and fibrin in distinct hues. The image you’re looking at likely shows several colors representing these elements: collagen or fibrin appearing in a yellow (or yellow-orange) shade, muscle in red, elastic fibers in black, and mucin in blue. This multicolor pattern is a hallmark of Movat pentachrome and helps distinguish connective tissue components and vascular features in a way that routine stains do not.

Hematoxylin and eosin would produce mainly blue/purple nuclei with pink cytoplasm, not the spectrum seen here. Gram stain highlights bacteria rather than tissue architecture. PAS highlights carbohydrates as magenta. The presence of multiple, clearly differentiated tissue colors across the section aligns with Movat pentachrome, making it the best match for the image.