What type of tissue component requires frozen sections?

• A. Adipose tissue
• B. Muscle
• C. Collagen
• D. Nerve tissue

Answer: (A)

The key idea is that lipids are lost or distorted during routine paraffin processing, so tissues rich in fat are best evaluated with frozen sections. Freezing preserves the lipid content in place, allowing clear visualization of fat droplets and adipocyte structure under the microscope. In other words, when you need to assess adipose tissue or fat-related features promptly or without lipid extraction, a frozen section keeps those lipid-rich components intact.

Other tissue types like muscle, collagen, or nerve tissue don’t rely on preserving lipids to the same extent; their structures remain recognizable after standard fixation and paraffin embedding, so frozen sections aren’t specifically required for them.