Colonoscopy Failure to Diagnose Cancer Lawsuits NY

How Colonoscopy Detects (and Misses) Cancer

During a colonoscopy, the gastroenterologist inserts a flexible tube with a camera (colonoscope) through the rectum and advances it through the entire colon. The goal is to: - Examine the entire colon lining for polyps, tumors, inflammation, or other abnormalities. - Remove polyps (polypectomy) — before they can become cancerous. - Bopsy suspicious lesions — to determine if they are cancerous.

A colonoscopy can miss polyps or tumors for several reasons: - Inadequate bowel preparation: If the patient's colon is not properly cleaned out, stool and residue may obscure the lining — making polyps and tumors difficult or impossible to see. The standard of care requires assessing bowel prep quality and repeating the procedure if it is inadequate. - Incomplete examination: The gastroenterologist may not reach the cecum (the end of the colon) — leaving the right side of the colon unexamined. The standard of care requires documenting cecal intubation (reaching the cecum). - Rushed procedure: Colonoscopy requires careful, slow examination of the colon lining — both during insertion and withdrawal. Studies show that longer withdrawal times are associated with higher polyp detection rates. The standard of care requires a minimum withdrawal time of at least 6 minutes. - Failure to identify polyps: Some polyps are flat, small, or located behind folds — making them difficult to see. The standard of care requires careful examination and use of techniques to improve detection. - Failure to completely remove polyps: If a polyp is identified but not completely removed, residual tissue may continue to grow and become cancerous. - Failure to identify tumors: A tumor may be misidentified as a normal fold, inflammation, or stool — particularly if it is small or atypical.

Reasons Colonoscopy Fails to Diagnose Cancer

Specific reasons colonoscopy fails to diagnose colon cancer include:

• Inadequate bowel preparation: The most common reason for missed lesions. The standard of care requires assessing prep quality and repeating the procedure if inadequate.
• Incomplete colonoscopy: Not reaching the cecum — leaving part of the colon unexamined. The standard of care requires documenting cecal intubation.
• Short withdrawal time: Withdrawing the scope too quickly — not allowing enough time to examine the colon lining. The standard of care requires a minimum withdrawal time of 6 minutes in a patient with adequate prep.
• Failure to detect flat or sessile polyps: Flat or sessile (broad-based) polyps are more difficult to detect than pedunculated (stalked) polyps. The standard of care requires careful examination and use of techniques to improve detection.
• Failure to detect polyps behind folds: The colon has natural folds that can hide polyps. The standard of care requires maneuvering the scope to see behind folds.
• Incomplete polyp removal: If a polyp is identified but not completely removed, residual tissue may grow and become cancerous. The standard of care requires complete removal and documentation.
• Failure to identify tumors: A tumor may be misidentified or obscured by stool, folds, or inflammation.
• Inadequate training or experience: Lower-volume endoscopists have lower polyp detection rates. The standard of care requires appropriate training and ongoing quality monitoring.
• Failure to use available technology: Advanced imaging techniques (narrow-band imaging, chromoendoscopy) can improve polyp detection rates. The standard of care may require these in certain cases.

The Standard of Care for Colonoscopy

The standard of care for colonoscopy is established by the American Society for Gastrointestinal Endoscopy (ASGE), the American College of Gastroenterology (ACG), and the U.S. Multi-Society Task Force on Colorectal Cancer. Key elements include:

1. Appropriate patient preparation: Adequate bowel preparation with a standard prep regimen. The standard of care requires assessing prep quality and repeating the procedure if it is inadequate.

2. Cecal intubation: The gastroenterologist must reach the cecum (the beginning of the colon) to examine the entire colon. Cecal intubation should be documented with photo documentation. The standard of care requires a cecal intubation rate of at least 90% in screening colonoscopies.

3. Adequate withdrawal time: The standard of care requires a minimum withdrawal time of at least 6 minutes in patients with adequate prep — longer withdrawal times are associated with higher polyp detection rates.

4. Thorough examination: Careful examination of the entire colon lining — including behind folds — using techniques to improve detection (position changes, abdominal pressure, irrigation).

5. Complete polyp removal: All identified polyps should be completely removed (unless there is a specific reason not to). The removal technique and specimen should be documented.

6. Appropriate biopsy: Suspicious lesions should be biopsied or removed for pathology examination.

7. Photo documentation: The cecum should be photo-documented to confirm complete examination. Photos of identified polyps and tumors should be taken.

8. Appropriate follow-up: Based on the findings, the patient should be given appropriate recommendations for follow-up screening intervals.

9. Quality monitoring: Endoscopists should monitor their own quality metrics — including cecal intubation rate, adenoma detection rate (ADR), and withdrawal time. The standard of care requires an ADR of at least 25% in men and 15% in women (screening colonoscopies).

When a Missed Polyp or Cancer Constitutes Malpractice

A missed polyp or cancer constitutes medical malpractice when the gastroenterologist failed to meet the standard of care:

- Inadequate bowel preparation not addressed: The prep was inadequate, but the gastroenterologist proceeded with the procedure anyway — or did not recommend a repeat procedure. - Incomplete colonoscopy: The gastroenterologist did not reach the cecum — leaving part of the colon unexamined — without documenting the reason or recommending alternative evaluation. - Short withdrawal time: The gastroenterologist withdrew the scope too quickly — not allowing enough time to examine the colon lining. - Failure to identify visible polyps or tumors: Lesions that should have been identified by a competent gastroenterologist were missed. - Incomplete polyp removal: A polyp was identified but not completely removed — leaving residual tissue that grew into cancer. - Failure to use available technology: Advanced imaging techniques that would have improved detection were not used. - Failure to communicate results and recommendations: The patient was not told about findings or given appropriate follow-up recommendations. [Link to: /delayed-diagnosis-lawyer/failure-to-follow-up]

To prove malpractice, expert testimony from a board-certified gastroenterologist is required. The expert reviews the procedure report, photos, pathology reports, and the subsequent course — and testifies about the standard of care and how it was breached.

Consequences of a Missed Colon Cancer

When a colonoscopy fails to detect a polyp or cancer, the consequences can be severe:

• Progression from polyp to cancer: A precancerous polyp that could have been removed progresses to invasive cancer.
• Progression to later-stage cancer: A cancer that could have been detected at Stage 1 (highly curable) progresses to Stage 3 or 4 (much worse prognosis).
• More extensive treatment: Later-stage cancer requires more extensive treatment — including surgery (colon resection), chemotherapy, and radiation — rather than simple polyp removal during colonoscopy.
• Spread to other organs: Advanced colon cancer can spread to the liver, lungs, and other organs — significantly reducing survival.
• Need for colostomy: More advanced cancer may require a colostomy — permanently altering the patient's quality of life.
• Death: In the worst cases, a missed colon cancer leads to death from a disease that could have been prevented or cured with early detection.
• Reduced survival probability: Even with treatment, later-stage colon cancer has a worse prognosis than early-stage.

The 'Loss of Chance' Doctrine in Colon Cancer Cases

The Loss of Chance doctrine is critical in colonoscopy failure cases. Under this New York legal doctrine, if the missed polyp or cancer reduced the patient's probability of survival or better outcome, the patient may recover damages — even if the outcome was not guaranteed.

In colonoscopy cases, the Loss of Chance doctrine applies when: - Earlier detection of a polyp would have allowed removal before it became cancerous. - Earlier detection of cancer at an earlier stage would have improved survival. - The delay made the cancer more advanced or harder to treat.

Expert testimony establishes survival statistics at different stages of colon cancer and how the delay reduced the patient's probability of survival. [Link to: /delayed-diagnosis-lawyer/loss-of-chance]

Proving Causation in Colonoscopy Failure Cases

Proving that a colonoscopy failure caused the patient's harm requires establishing:

1. The standard of care was breached: Expert testimony that the gastroenterologist failed to meet the standard of care — inadequate prep, incomplete examination, short withdrawal time, or failure to identify/remove polyps.

2. The polyp or cancer was present at the time of the colonoscopy: Expert testimony (often based on the subsequent colonoscopy findings, pathology reports, and the timeline) establishing that the polyp or cancer was present and detectable at the prior colonoscopy.

3. Earlier detection would have prevented or reduced the cancer: Expert testimony that if the polyp had been removed or the cancer detected earlier, the patient would not have developed invasive cancer, or the cancer would have been less advanced.

4. The failure was a substantial factor in causing the harm: The patient's cancer would not have occurred, or would have been less severe, if the colonoscopy had been performed correctly.

The defense may argue that the polyp or cancer was not present at the prior colonoscopy (rapid growth), that it was difficult to detect (flat, behind a fold), or that the outcome would have been the same regardless. Expert testimony is required to counter these arguments. [Link to: /misdiagnosis/differential-diagnosis]

New York Statute of Limitations

Under CPLR § 214-a, the statute of limitations is 2.5 years from the date of the colonoscopy. Lavern's Law provides a discovery rule for cancer misdiagnosis — 2.5 years from discovery, with a 7-year outer limit. This is critical for colonoscopy cases because the failure may not be discovered until years later — when cancer is ultimately diagnosed at a subsequent colonoscopy or when symptoms develop. The continuous treatment doctrine may also extend the deadline. [Link to: /misdiagnosis/laverns-law]

Frequently Asked Questions

The value of a medical malpractice case in New York depends on several factors, including the severity of the injury, the strength of liability evidence, and the economic and non-economic damages involved. New York is one of the few states with no caps on medical malpractice damages, meaning there is no artificial limit on what you can recover. Below are typical settlement ranges based on injury severity.