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Digital Pathology and AI — in Biopsy Reporting

When you hear that AI is involved in reading your biopsy, it is natural to wonder who is actually making the diagnosis. The answer is still a pathologist — a doctor trained specifically to interpret tissue. AI is a tool they use, not a replacement for that judgement.

Medically reviewed by Dr. Mohammed Imaduddin, Surgical Oncologist, MBBS · MS (General Surgery) · M.Ch (Surgical Oncology) · Last reviewed September 2026

  • A pathologist still decides — AI assists, it does not diagnose. Every biopsy report is reviewed and signed off by a qualified pathologist.
  • The slide is digitised — Your biopsy slide is scanned into a high-resolution digital image that can be reviewed on screen and shared with specialists at other centres.
  • AI flags areas to examine — AI tools highlight regions on the slide that may need closer attention, helping the pathologist work more systematically.
  • The evidence is still developing — AI performs well on specific tasks. How it compares across the full range of diagnostic decisions is still being studied.
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AI tools are now used in some pathology labs to scan your biopsy slide digitally and flag areas for the pathologist to review. A trained pathologist still examines every result and signs off on the diagnosis. AI is an aid to the pathologist, not a replacement for their judgement.

How is AI-assisted digital pathology different from traditional pathology?

FeatureTraditional pathologyAI-assisted digital pathology
How the slide is examinedPathologist views a glass slide under a light microscopeSlide is scanned into a digital image; pathologist reviews it on screen with AI-flagged areas highlighted
Who makes the diagnosisPathologist alonePathologist — AI does not diagnose independently
Sharing for a second opinionGlass slide must be physically sent to another centre, taking daysDigital image can be shared with a specialist at another centre within hours
Consistency of reviewCan vary with fatigue and which section of the slide the pathologist focuses onAI applies the same criteria across the full slide every time before the pathologist reviews it
Speed of initial scanningDepends on pathologist workload and case complexityAI can scan the full slide rapidly and pre-flag regions for pathologist attention
Availability in IndiaStandard in all pathology laboratoriesAvailable at some centres; expanding across the country

What stays the same when AI is used for your biopsy

  • A qualified pathologist reviews your slide and signs the report.
  • The tissue biopsy remains the required standard for confirming a cancer diagnosis.
  • Your oncologist interprets the pathology report in the context of your full clinical picture.
  • You can ask for your slides to be reviewed by a second pathologist.
  • A digital or AI-assisted report carries the same clinical weight as a traditional one.

Does a pathologist still check my result?

Yes. In both traditional and AI-assisted pathology, a qualified pathologist reviews your slide and signs the report. Their name is on the document. They are responsible for the diagnosis.

AI works before the pathologist sits down with the slide — scanning the image and highlighting regions that may need attention. The pathologist then reviews those flags alongside the full image using their own trained eye.

The pathologist is not required to agree with what AI has flagged. Their independent judgement is always part of the process, and the algorithm does not override it.

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Is AI more accurate at reading biopsies than a pathologist?

For specific, well-defined tasks — such as grading certain tumour types or detecting a particular pattern of cells — AI has performed comparably to experienced pathologists in research settings. Across the full range of diagnostic decisions, the evidence is still maturing.

What AI does well is consistency. It applies the same criteria to every region of the slide without fatigue. A pathologist brings the clinical context — your history, your imaging, the specific question your oncologist is asking — that the algorithm cannot read from the slide.

ASCO and the College of American Pathologists have both issued guidance specifying that AI tools in pathology must operate under pathologist oversight. The technology is genuinely useful and still developing.

Can a liquid biopsy blood test replace my tissue biopsy?

A liquid biopsy — a blood test that looks for fragments of tumour DNA in your bloodstream — cannot replace a tissue biopsy for the initial confirmation of a cancer diagnosis. ESMO and NCCN guidance is consistent on this point.

Liquid biopsy is used for specific purposes: detecting mutations that guide treatment choice, monitoring whether a cancer is becoming resistant to a drug, or detecting early signs of recurrence. For those questions it can be valuable.

If you are hoping to avoid a needle biopsy, ask your oncologist what a blood test can and cannot answer for your specific situation. For some decisions it is enough. For the initial diagnosis and many treatment decisions, the tissue result is still required.

Did you know?

A digitised pathology slide can contain several billion pixels — far more visual information than a pathologist can examine section by section in a single sitting.

AI assistance in pathology was developed to ensure the full slide is scanned systematically before the pathologist focuses on the most clinically significant areas.

Source: College of American Pathologists, Digital Pathology Resources

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Common questions

Frequently asked questions

Is my biopsy being read by AI or by a doctor?

Your biopsy is read by a qualified pathologist — a doctor trained specifically to interpret tissue samples. If AI tools are used, they work alongside the pathologist by scanning the slide and flagging areas for closer review. The pathologist examines those flags and the full image, then writes and signs the report. AI does not issue a diagnosis on its own.

How accurate is AI at reading cancer biopsies?

For specific tasks — such as grading certain tumour types — AI has performed comparably to experienced pathologists in research settings. Across the full range of diagnostic work, the evidence is still maturing. The current value is largely in consistency: AI applies the same criteria to every part of the slide without fatigue. A pathologist still brings the clinical context the algorithm cannot access from the slide alone. No AI system in pathology currently operates without pathologist oversight.

Can I ask for my slides to be reviewed by a second pathologist?

Yes, and it is a reasonable request — particularly for a new cancer diagnosis, a rare tumour type, or a result that will drive a major treatment decision. In digital pathology, a high-resolution image of your slide can be shared with a specialist at another centre without the physical glass needing to be transported. Ask your oncologist or the treating team to arrange a second opinion. It is a standard clinical practice.

What exactly is digital pathology?

Digital pathology means your glass biopsy slide is scanned by a high-resolution scanner, producing a digital image that a pathologist views on a monitor rather than under a microscope. The image can be magnified digitally, annotated, and shared electronically. AI tools work on this digital image — they cannot be applied to a physical glass slide. The biopsy process itself, where the tissue sample is taken from you, is unchanged.

Will AI make my biopsy result faster?

It may contribute, though turnaround times depend on many factors beyond the pathology read — laboratory workload, whether the tissue needs additional staining, and how complex the case is. AI can scan a slide quickly before the pathologist reviews it, which may shorten that step. Whether this means a faster result for you specifically depends on your centre and your case. If timing matters to you, ask your treating team when to expect the report rather than assuming it.

Is liquid biopsy an alternative to a tissue biopsy?

Liquid biopsy, a blood test that detects tumour DNA fragments, is not a replacement for tissue biopsy when the goal is confirming a cancer diagnosis. ESMO and NCCN guidance is clear on this. Where liquid biopsy is used is for detecting specific mutations, monitoring for drug resistance, or picking up early signs of recurrence — situations where a repeat tissue biopsy would be difficult. For an initial diagnosis, or when the treatment decision requires knowing what the tissue itself looks like, tissue biopsy remains required. Ask your oncologist whether a liquid biopsy is relevant for your specific question.

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