Direct comparison
Cryostat vs. Microtome: Key Differences
Cryostat vs. microtome compared: frozen vs. paraffin sectioning, section thickness, turnaround time, and when a pathology lab needs both instruments.
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How do Cryostat, Microtome (Rotary) compare side by side?
The table below compares Cryostat, Microtome (Rotary) across 9 procurement-relevant dimensions, from what it sections through does a lab need both?.
Side-by-side comparison
| Dimension | Cryostat | Microtome (Rotary) |
|---|---|---|
| What it sections | Frozen, unfixed tissue, rapidly frozen and mounted in OCT compound | Chemically fixed tissue embedded in paraffin wax |
| Operating environment | Inside an insulated, mechanically refrigerated chamber, well below freezing | Room temperature, open bench |
| Typical section thickness | Roughly 5-10 µm — thicker than paraffin sections since frozen tissue lacks paraffin's structural support | Roughly 3-5 µm for routine histology, up to ~10 µm for some specimens |
| Turnaround time | About 10-20 minutes from tissue arrival to a readable slide | Many hours to a full day — fixation, processing, paraffin embedding, then sectioning |
| Primary clinical use | Intraoperative frozen-section consultation — margin and tumor checks during surgery | Routine, non-urgent diagnostic histology and permanent archival slides |
| Section and slide quality | Coarser morphology; slides don't keep well long-term | Higher-detail morphology; slides are stable for long-term archival storage |
| Common research use | Fixation-sensitive techniques: immunofluorescence, in situ hybridization, antigen-sensitive IHC | Routine H&E, most fixed-tissue IHC, long-term and archival research studies |
| Relationship between the two | A specialized microtome housed in a refrigerated cabinet | The base instrument category — unqualified, "microtome" usually means the room-temperature rotary type |
| Does a lab need both? | Yes, if the lab does any intraoperative or fixation-sensitive work | Yes, for any routine diagnostic or archival histology workflow |
Common questions
Common questions about Cryostat vs Microtome (Rotary)
Do pathology labs need both a cryostat and a microtome?
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Most surgical pathology labs run both: a cryostat for anything needing a same-encounter answer or unfixed tissue, and a standard rotary microtome for the routine paraffin workflow that follows. A lab doing only routine, non-urgent histology can operate with a microtome alone; a lab doing any intraoperative frozen-section work needs a cryostat as well.
Is a cryostat just a different type of microtome?
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Yes. It's the same underlying cutting mechanism, a blade advancing tissue in precise increments, housed inside a refrigerated cabinet built specifically for frozen, unfixed tissue. A cryostat is a specialized microtome, not a separate instrument category.
Why are frozen sections cut thicker than paraffin sections?
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Frozen tissue lacks the structural support that paraffin embedding provides, so it's harder to cut thin without tearing or curling. That's one reason frozen sections typically run several microns thicker than routine paraffin sections.
Can a cryostat replace a microtome for routine histology?
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Not for routine diagnostic work. Frozen sections trade section quality and long-term archival stability for speed, producing coarser morphology and slides that don't keep well over time. Routine, non-urgent histology still goes through paraffin processing and a standard rotary microtome.
Going deeper
