What is the maximum histology sample volume that can be posted?

• A. 10 ml
• B. 50 ml
• C. 100 ml
• D. 5 ml

Answer: (B)

Safety and packaging rules for sending histology samples by post set a practical limit on liquid volume to minimize leakage risks and keep packaging manageable. Fifty milliliters is chosen as the upper limit because it allows a small tissue specimen to be placed in fixative with a sufficient fixative-to-tissue ratio while keeping the container size, weight, and the triple-pack packaging within standard postal requirements. Smaller volumes may not provide enough fixative or a representative sample, while larger volumes like 100 ml increase the chance of leakage and packaging difficulties and can push the shipment into stricter regulatory categories. So, the maximum volume that can be posted is 50 ml.