How to Get Pathology Slides for a Second Opinion

A second-opinion oncologist can read a report. A second-opinion pathologist has to look through a microscope. That means physical material has to travel.

The National Cancer Institute says this directly. Patients or their doctors may want a second opinion from another pathologist, and to get one, you will need to obtain the slides and paraffin block from the pathologist who examined the sample, or from the hospital.

So this is a shipping problem as much as a paperwork problem.

NCI describes the process. Your tissue is preserved with a chemical, usually formalin. Water is then removed and replaced with molten paraffin wax. The tissue is embedded into a permanent paraffin wax block. Thin sections are cut from that block, placed on glass slides, and stained.

That leaves three separate things, and they are not interchangeable:

• The report. The pathologist's written diagnosis, with identifying information, the body site, a gross description, microscopic findings, the final diagnosis, and often a comment section.
• The slides. Thin stained sections on glass. This is what a second pathologist looks at.
• The block. The wax-embedded tissue itself. New slides can be cut from it, and it is what molecular and biomarker testing usually requires.

If you had a frozen section during surgery, know that it is a different preparation. NCI notes it can be done in about 15 to 20 minutes when an immediate answer is needed, but the fixed permanent section preserves more detail.

Federal law under CLIA, at 42 CFR 493.1105, sets minimum retention periods. These are floors, not ceilings, and many labs keep material longer.

• Histopathology slides: at least 10 years from the date of examination.
• Cytology slide preparations: at least 5 years from the date of examination.
• Pathology specimen blocks: at least 2 years from the date of examination.
• Pathology test reports: at least 10 years after the date of reporting.
• Remnant tissue: preserved until a diagnosis is made on the specimen.

Look at the block again. Two years is the federal floor.

That matters because the block, not the slides, is what a lab needs for most genomic and biomarker testing. If a new targeted therapy becomes available five years after your surgery, the tissue needed to test for it may or may not still exist. Call the lab and ask what their own policy is. Some keep blocks for decades. Ask them to note in the file that the block should be retained.

The records office usually cannot help with slides. You want the pathology department of the hospital or lab whose name appears at the top of your report, and specifically the person who handles slide release or "outside consults."

Have these ready before you dial:

• The accession number from the report, which looks like S24-12345 or similar.
• The date of the procedure and the body site.
• The exact name and address of the receiving pathology department, plus a contact name and phone number there.
• Your date of birth and the medical record number on the report.

Then ask four questions. What do you need in writing from me? Do you release the slides, recuts, or the block? Do you ship directly to the other lab, and how long does it take? Do the materials need to come back to you?

Most labs treat slides as a loan and expect them returned. Ask whether recuts, meaning fresh slides cut from your block, can be sent instead so the originals stay put.

Getting the written report is governed by HIPAA. Under 45 CFR 164.524 you have the right to inspect and obtain a copy of your protected health information in a designated record set. The provider must act on your request within 30 days, with one possible extension of up to 30 more days, and they must tell you in writing if they take it.

You can also require that the copy be sent straight to another person, if your request is in writing and signed by you. That is the efficient way to route your report to the second-opinion center.

Fees are capped by that same rule. A provider may charge only for labor for copying, supplies for the paper copy or electronic media, postage, and preparing an explanation or summary if you agreed to it in advance.

Physical slides and blocks sit outside that right, because they are specimens rather than records. They are released under the lab's own policy and state law. In practice, a signed release from you is what starts the process.

NCI advises seeking a second opinion before you begin treatment, after you have discussed the diagnosis and plan with your first doctor. It also notes that many health insurance companies pay for a second opinion, and some require one, particularly when a doctor recommends surgery.

Call your insurer and ask two things. Is a second opinion covered, and does the second-opinion pathology review need separate prior authorization? Pathology consultation is billed by the reviewing lab, not by the doctor you see.

To find where to send material, NCI points to its Find a Cancer Center page for NCI-designated centers, and to the Cancer Information Service at 1-800-4-CANCER.

• Day 1: Request the written report through the records office. Note the 30-day deadline.
• Day 1: Call pathology and ask what release form they need.
• Day 2 to 5: Send the signed release, with the accession number and the receiving address.
• Day 5 to 15: Material ships. Ask for a tracking number and confirm the other lab received it.
• Then allow the reviewing pathologist time to read and issue a consultation report.

Build in more time than seems necessary. The most common delay is not the review itself. It is a release form sitting in the wrong inbox because nobody confirmed the receiving address.

https://www.cancer.gov/about-cancer/diagnosis-staging/diagnosis/pathology-reports-fact-sheet

https://www.ecfr.gov/current/title-42/chapter-IV/subchapter-G/part-493/subpart-J/section-493.1105

https://www.ecfr.gov/current/title-45/subtitle-A/subchapter-C/part-164/subpart-E/section-164.524

https://www.cancer.gov/about-cancer/managing-care/finding-cancer-care