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Delayed Colon Cancer Diagnosis NY: Missed Screening and Polyp Errors
Excerpt: Colon cancer is highly curable when caught early — but when screening is missed, colonoscopies are incomplete, or polyps are not followed up, the delay can turn a preventable cancer into a fatal one.
Table of Contents
- The Preventable Cancer
- How Colon Cancer Is Diagnosed
- Failure to Screen
- Colonoscopy Errors
- Polyp Detection and Removal Errors
- Pathology Errors
- Failure to Follow Up on Abnormal Results
- The Impact of Delayed Colon Cancer Diagnosis
- Lavern's Law and the Discovery Rule
- Proving Causation
- Expert Witnesses
- Statute of Limitations
- Frequently Asked Questions
The Preventable Cancer
Colorectal cancer is the third most commonly diagnosed cancer and the second leading cause of cancer death in the United States. In New York, approximately 9,000 people are diagnosed with colorectal cancer each year.
What makes colorectal cancer unique among cancers is that it is largely preventable through screening. Most colon cancers begin as polyps — small growths on the inner lining of the colon or rectum. If polyps are detected and removed during a colonoscopy before they become cancerous, colon cancer can be prevented entirely.
Even when cancer has already developed, early detection dramatically improves survival:
- Stage I (localized) — 5-year survival rate: ~91%
- Stage II (regional spread) — ~72%
- Stage III (lymph node involvement) — ~54%
- Stage IV (distant metastasis) — ~15%
A delayed diagnosis — caused by failure to screen, incomplete colonoscopy, missed polyps, or pathology errors — can allow colon cancer to progress from a highly curable stage to a terminal one.
[Link to: /medical-malpractice/misdiagnosis]
How Colon Cancer Is Diagnosed
Screening
The U.S. Preventive Services Task Force (USPSTF) recommends colorectal cancer screening for all adults aged 45 to 75. Screening options include:
- Colonoscopy — The gold standard; allows direct visualization and removal of polyps
- Fecal immunochemical test (FIT) — Stool test for hidden blood
- FIT-DNA test (Cologuard) — Stool test for DNA markers and blood
- Flexible sigmoidoscopy — Examines only the lower colon
- CT colonography (virtual colonoscopy) — CT scan of the colon
Diagnostic Evaluation
When a patient has symptoms (such as rectal bleeding, change in bowel habits, or unexplained weight loss) or an abnormal screening result, the standard of care requires:
- Colonoscopy — To visualize the entire colon and remove any polyps
- Biopsy — Of any suspicious lesions
- CT scan — To evaluate for metastasis if cancer is found
- CEA (carcinoembryonic antigen) — A blood tumor marker
Failure to Screen
The standard of care requires physicians to offer colorectal cancer screening to all eligible patients. Failure to screen may be negligence when:
- The patient is of screening age (45-75) and has never been screened
- The patient has risk factors — Family history, inflammatory bowel disease, personal history of polyps
- The patient has symptoms — Rectal bleeding, change in bowel habits, unexplained weight loss, anemia
Failure to recommend screening — or failure to follow up on a patient who is overdue for screening — can allow cancer to develop and progress undetected.
Colonoscopy Errors
Colonoscopy is the gold standard for colorectal cancer screening, but it is not perfect. Studies have shown that colonoscopy misses approximately 5-6% of cancers and 20-25% of polyps. However, some of these misses constitute negligence when they involve:
1. Incomplete Colonoscopy
The standard of care requires the endoscopist to reach the cecum (the beginning of the colon). If the colonoscopy is incomplete — due to poor preparation, technical difficulty, or inadequate sedation — and the endoscopist fails to arrange a follow-up study (such as barium enema or CT colonography), cancer in the unexamined portion may go undetected.
2. Missed Polyps
Polyps — particularly flat polyps or small polyps in the right colon — may be missed. The standard of care requires:
- Adequate bowel preparation — The colon must be clean for adequate visualization
- Adequate withdrawal time — The endoscopist should spend at least 6 minutes withdrawing the scope and inspecting the colon
- Careful examination — Of all areas of the colon
3. Failure to Remove Polyps
When a polyp is identified, the standard of care requires removal (polypectomy) — unless there is a specific contraindication. Failure to remove a polyp that later becomes cancerous may be negligence.
4. Inadequate Documentation
The endoscopist should document:
- Quality of preparation — Was the colon adequately cleaned?
- Extent of examination — Did the scope reach the cecum?
- Findings — What polyps or lesions were identified?
- Interventions — What was removed or biopsied?
- Withdrawal time — How long was spent inspecting the colon?
- Follow-up recommendations — When should the next colonoscopy be?
[Link to: /medical-malpractice/radiology-errors]
Polyp Detection and Removal Errors
The Adenoma-Carcinoma Sequence
Most colon cancers develop from adenomatous polyps over a period of 5-15 years. If a polyp is detected and removed during this window, colon cancer is prevented. If the polyp is missed — or removed inadequately — it may progress to cancer.
Types of Polyps
- Hyperplastic polyps — Generally benign; low risk of cancer
- Adenomatous polyps (adenomas) — Premalignant; higher risk of cancer
- Tubular adenoma — Lower risk
- Villous adenoma — Higher risk
- Tubulovillous adenoma — Intermediate risk
- Sessile serrated adenomas — Can be difficult to see; can progress to cancer
Polyp Removal Technique
The standard of care requires:
- Complete removal — The entire polyp must be removed
- Proper technique — Using snare polypectomy, hot biopsy, or other appropriate techniques
- Pathology submission — All removed tissue must be sent for pathology
If a polyp is incompletely removed — and the residual tissue becomes cancerous — this may be negligence.
Pathology Errors
The pathologist examines the removed polyp or biopsy tissue to determine:
- Whether cancer is present
- The type of polyp — (adenoma, hyperplastic, etc.)
- The grade — How aggressive the cancer appears
- The margins — Whether the cancer was completely removed
Types of Pathology Errors
- False negative — Missing cancer that is present in the tissue
- False positive — Diagnosing cancer when it is not present
- Misclassification — Identifying the wrong type of polyp or cancer
- Margin assessment errors — Incorrectly reporting whether the margins are clear
[Link to: /medical-malpractice/pathology-errors]
Failure to Follow Up on Abnormal Results
One of the most common and dangerous errors is the failure to follow up on abnormal results:
- A patient with an abnormal FIT is not referred for colonoscopy
- A patient with a polyp is not told when to return for their next colonoscopy
- A patient with an incomplete colonoscopy is not scheduled for a repeat study
- A patient with a pathology report showing cancer is not notified
The standard of care requires a systematic approach to tracking and following up on abnormal results.
The Impact of Delayed Colon Cancer Diagnosis
Staging and Survival
| Stage | Description | 5-Year Survival | |-------|-------------|----------------| | Stage I | Cancer in the colon wall | ~91% | | Stage II | Through the colon wall | ~72% | | Stage III | Lymph node involvement | ~54% | | Stage IV | Distant metastasis | ~15% |
A delay of months can allow cancer to progress from a highly curable stage (Stage I) to an advanced, less curable stage (Stage III or IV).
Lavern's Law and the Discovery Rule
New York's Lavern's Law is particularly relevant to delayed colon cancer diagnosis cases. The patient may not discover the diagnostic error — the missed polyp, the incomplete colonoscopy, the unreported abnormal result — until months or years later.
Under the discovery rule, the statute of limitations may begin when the patient discovered (or should have discovered) the malpractice.
Proving Causation
In a delayed colon cancer diagnosis case, the plaintiff must prove that the delay caused additional harm. This requires expert testimony from:
- A gastroenterologist — On the standard of care for colonoscopy
- A pathologist — On the standard of care for pathology interpretation
- A surgeon — On the impact of delay on surgical options
- An oncologist — On the impact of delay on survival
- A biostatistician — On the reduction in survival probability
Statute of Limitations
Under CPLR 214-a, the statute of limitations is 2.5 years from the date of the malpractice. Under Lavern's Law, the clock may start when the patient discovered the malpractice.
Frequently Asked Questions
Can I sue for delayed colon cancer diagnosis?
Yes. If a physician failed to screen you, a gastroenterologist missed a polyp or performed an incomplete colonoscopy, a pathologist misread a biopsy, or a provider failed to follow up on abnormal results — and the delay caused additional harm — you may have a malpractice claim.
How is colon cancer screening done?
The gold standard is colonoscopy, which allows direct visualization and removal of polyps. Other options include stool tests (FIT, Cologuard) and CT colonography.
Can a polyp be missed during a colonoscopy?
Yes. Studies show that colonoscopy misses approximately 20-25% of polyps and 5-6% of cancers. However, missing a polyp due to inadequate preparation, insufficient withdrawal time, or poor technique may be negligence.
What if my colonoscopy was incomplete?
If your colonoscopy was incomplete — the endoscopist didn't reach the cecum — the standard of care requires a follow-up study (such as barium enema or CT colonography). Failure to arrange follow-up may be negligence.
How long do I have to file a claim?
Under CPLR 214-a, the deadline is generally 2.5 years from the date of the malpractice. Lavern's Law may extend this for cancer cases.
If you or a loved one has been affected by a delayed colon cancer diagnosis in New York, contact MDLaw Firm at 347-524-5777 for a free consultation.
This article is for informational purposes only and does not constitute legal advice. Prior results do not guarantee a similar outcome. No attorney-client relationship is created by reading this article or contacting MDLaw Firm.