Biopsy Blocks & Slides Collection for Cancer Second Opinions in Delhi NCR

Why Physical Blocks & Slides Are Required

For oncology second opinions, photocopies or scanned copies of biopsy reports are not sufficient. The consulting pathologist needs to physically examine the original tissue blocks and glass slides. Here is why:

• Tumor margin re-evaluation — re-examination of surgical margins changes or refines cancer staging in up to 25% of cases, which can alter the treatment plan.
• Molecular and genetic testing — additional tests such as NGS, EGFR, ALK, and BRCA panels require fresh cuts from the original paraffin block. These cannot be done on photocopies.
• Immunohistochemistry (IHC) staining — markers like HER2-neu, ER/PR, and PD-L1 require physical tissue slices to determine targeted therapy eligibility.
• Pathologist verification — the second-opinion pathologist must independently verify tumor grade, molecular sub-types, and surgical margin clearance before chemotherapy or radiation decisions.

Major institutions that require physical biopsy specimens for second opinions include Tata Memorial Centre (Mumbai), Rajiv Gandhi Cancer Institute & Research Centre (Delhi), and AIIMS New Delhi.

How Biopsy Specimens Are Processed

When a biopsy is performed, the tissue sample is processed and archived by the hospital's pathology department:

• FFPE tissue blocks — tumor/tissue samples are processed into Formalin-Fixed Paraffin-Embedded (FFPE) blocks, which preserve the tissue indefinitely at room temperature.
• Glass slides — microscopic sections (3 to 5 microns thick) are cut from the block, placed on glass slides, and stained with Hematoxylin & Eosin (H&E) for routine examination.
• IHC slides — additional slides may be stained with Immunohistochemistry (IHC) markers for tumor typing (HER2-neu, ER/PR, PD-L1, Ki-67, etc.).
• Archival — hospitals archive tissue blocks for 5 to 10 years by law, making them available for retrieval when a second opinion is needed.

The Collection Process Step-by-Step

• Step 1: Submit formal requisition — the companion submits a formal patient requisition form at the pathology department, along with a doctor's referral slip requesting slides and the patient's Aadhaar copy.
• Step 2: Pay refundable deposit — hospitals require a refundable security deposit (usually ₹1,000 to ₹3,000) for tissue blocks, with an undertaking to return them after review.
• Step 3: Collect blocks and slides — the companion collects the FFPE tissue blocks and glass slides directly from the pathology department. Blocks are packed in thermal insulated bubble packaging and slides in rigid plastic slide mailers to prevent breakage and heat damage.
• Step 4: Transport with chain-of-custody — the companion maintains a chain-of-custody log with timestamps and delivers the specimens directly to the consulting pathologist or specialist, either same-day or via premium medical courier (BlueDart Apex / DHL Medical Express) for domestic or international transit.

Processing time at the pathology department is typically same-day to 3 days, depending on whether the blocks are readily accessible or need to be retrieved from archival storage.

Refundable Deposits & Hospital Return Protocol

Hospitals archive tissue blocks for 5 to 10 years by law. When requesting blocks for a second opinion:

• A formal patient requisition must be submitted to the pathology department.
• A doctor's referral slip requesting slides is required.
• A refundable security deposit of ₹1,000 to ₹3,000 is charged, which is refunded when the blocks are returned after the second-opinion review.
• An undertaking to return the remaining blocks after review must be signed.

The companion handles the deposit payment (reimbursed by the family), the collection, and the return of blocks after the second opinion is completed.

Protective Packaging & Transport

Biopsy blocks and glass slides are fragile and temperature-sensitive. Proper packaging is critical:

• Glass slides — packed in rigid foam-lined slide storage cases to prevent breakage.
• FFPE tissue blocks — packed in thermal insulated bubble packaging to prevent heat damage (paraffin melts at approximately 56-64°C).
• Shock absorption — shock-absorbent thermal bubble mailers provide additional protection during transit.
• Temperature-controlled handling — blocks are kept at room temperature and protected from direct sunlight and heat sources.
• Courier options — same-day hand delivery within Delhi NCR, or premium medical courier (BlueDart Apex / DHL Medical Express) for domestic or international transit.
• Chain-of-custody — a log with timestamps is maintained throughout transport.

Pathology Labs & Hospitals Served

Biopsy blocks and slides can be collected from NABL/NABH accredited pathology labs and hospital diagnostic departments across Delhi, Noida, Greater Noida, Gurugram, Faridabad, and Ghaziabad. Indicative list:

This list is non-exhaustive. Collection is available from any NABL/NABH accredited pathology lab, imaging hub, or hospital diagnostic department in Delhi NCR.

Using a Companion for Biopsy Collection

A hospital companion handles the entire biopsy block and slide collection process for cancer patients and their families:

• Visits the source hospital's pathology department with the patient's UHID card, Aadhaar, authorization letter, and doctor's referral slip.
• Submits the formal requisition and pays the refundable deposit (reimbursed by the family).
• Collects the FFPE blocks and glass slides with proper protective packaging.
• Delivers specimens same-day to the second-opinion hospital within Delhi NCR, or coordinates premium medical courier for outstation delivery.
• Maintains chain-of-custody documentation throughout.
• Returns the blocks to the source hospital after the second opinion is completed, and collects the deposit refund.

The flat fee for this service is ₹599/day, which covers a full day of hospital visits. This is one of the most valuable services for cancer patients seeking second opinions in Delhi, as it eliminates the need for the patient or family to navigate the complex pathology retrieval process themselves.

Corelatin is an independent hospital companion service, not affiliated with or endorsed by any hospital or pathology lab. Companions provide non-medical logistical assistance only.

Frequently Asked Questions