When Abnormal Pap Smears and HPV Results Get Lost in the System

Cervical cancer is one of the few cancers doctors can usually catch before it becomes cancer at all. A Pap test can find abnormal cells long before they turn dangerous. An HPV test can flag the virus behind nearly all cervical cancers years before symptoms appear.

So when a woman is diagnosed with advanced cervical cancer after an abnormal Pap or a positive HPV test sat in her chart for a year, two years, or five, the first question is how it happened. Someone ordered the test.

Someone got the result. Somewhere between the lab and the follow-up visit that should have come next, something broke down.

This article explains how screening and follow-up are supposed to work, where the process most often fails, and what New York law says about holding a doctor, lab, or practice accountable.

How Cervical Cancer Screening Is Supposed to Work

Nearly all cervical cancers are caused by a long-lasting infection with a high-risk type of HPV. Most people clear the virus on their own without ever knowing they had it. When it persists, it can slowly push cervical cells through precancerous stages that, left alone, may become invasive cancer. That progression usually takes years, which is exactly why screening works so well when it is done right.

A Pap test looks at cervical cells under a microscope. An HPV test looks for the virus itself. The American Cancer Society's screening guideline, updated in December 2025, recommends that people with a cervix start screening at 25 and continue until at least 65. The preferred test is primary HPV testing on a sample collected by a clinician every five years. A self-collected HPV test every three years, co-testing every five years, or a Pap test alone every three years are also acceptable. Screening can stop at 65 only for women whose recent results have been normal, such as two normal HPV tests in a row.

ACS is clear that its routine schedule does not apply to women who have had abnormal results in the past. Those patients need a plan tailored to their history. None of the screening matters if an abnormal result does not trigger the next step.

What Should Happen After an Abnormal Pap or HPV Result

A single abnormal result does not always mean an immediate biopsy. The right response depends on what the result shows and on the patient's prior history.

Since 2020, doctors in the United States have followed the 2019 ASCCP Risk-Based Management Consensus Guidelines. Instead of reacting to one test in isolation, the provider combines the current result with past Pap and HPV results to estimate the patient's immediate risk of a serious precancer, called CIN 3 or worse. When that risk reaches 4 percent or more, the guidelines call for colposcopy, a closer exam of the cervix that usually includes a biopsy. Below that threshold, the patient is brought back for repeat testing in one, three, or five years depending on her longer-term risk.

In practice, a mildly abnormal Pap (ASC-US) with a negative HPV test often means a return to routine screening. ASC-US or a low-grade lesion (LSIL) with a positive high-risk HPV test usually crosses the line into colposcopy. High-grade results, such as HSIL or atypical glandular cells, call for colposcopy or further sampling, and sometimes treatment right away. A positive test for HPV 16 or 18, the two strains behind most cervical cancers, is treated as higher risk even when the Pap looks normal.

The guidelines tell a provider what should happen next. When an abnormal result does not lead to the recommended step and the patient is later diagnosed with a cancer screening should have caught as a precancer, that gap is often where a malpractice claim begins.

Where the Process Breaks Down

These cases rarely turn on one dramatic mistake. More often, a link in the chain from lab to doctor to patient fails. A lab reports an abnormal result, but it never reaches the ordering physician because of a paperwork or electronic records error. The physician receives it, but the office has no tracking system to flag it, so it sits in a file. A patient is told she needs a colposcopy, but no one confirms she went, and she is quietly lost to follow-up. A cytology slide is misread, producing a falsely reassuring result. Or a provider looks at a single result without checking the patient's history and misses a pattern of repeat abnormalities.

That last failure has become more important under the risk-based guidelines. A doctor who treats each mildly abnormal Pap as a one-off, without checking whether the patient had a similar result the year before, can miss exactly the kind of risk the 2019 guidelines were designed to catch.

Whatever the cause, the result is the same: a window of years when precancerous changes could have been removed with a fairly simple office procedure, lost to clinical and administrative gaps.

Why the Delay Matters

Timing changes everything with cervical cancer. According to ACS survival data, the five-year relative survival rate is 91 percent when the cancer is still confined to the cervix or uterus. It falls to 62 percent once it reaches nearby lymph nodes and to 20 percent when it has spread to distant organs. A precancer caught on follow-up never makes it onto that chart at all.

Is a Missed Follow-Up Medical Malpractice in New York?

Not every bad outcome is malpractice, and not every missed follow-up means someone was negligent. A New York malpractice claim has to show two things.

First, the doctor, lab, or practice departed from accepted medical practice, meaning they did something, or failed to do something, that a reasonably careful provider in the same field would not have under similar circumstances. That almost always requires a qualified medical expert.

Second, the departure was a substantial factor in causing harm. In a cervical cancer case, that usually means showing that if the colposcopy had happened when it should have, or the abnormal result had been communicated and acted on, the disease would have been caught as a precancer or early-stage cancer instead of progressing to invasive disease. A patient does not need to prove that earlier treatment was guaranteed to cure her. Evidence that the delay reduced her chance of a better outcome can support a claim, which matters in cancer cases where earlier treatment usually means a meaningfully better prognosis.

Can You Sue for a Delayed Cervical Cancer Diagnosis?

You may be able to. If an abnormal Pap or positive HPV test was not properly followed up and the failure let cervical cancer progress, you may have a claim against the doctor, gynecologist, lab, or practice responsible for the gap.

These cases usually turn on a few questions. What did each result show, and when? What did the guidelines call for, given the patient's full history? Were there earlier abnormal results that should have prompted faster action? And where did the breakdown happen: communication, tracking, referral, or interpretation? Answering them takes a careful review of records going back years, along with expert input on what the standard of care required at each step. You can read more about cervical cancer malpractice claims and our clients' stories.

How Long Do You Have to File in New York?

Under CPLR 214-a, the general deadline for a malpractice lawsuit is two years and six months from the act or omission. Missing it ordinarily ends the claim, no matter how strong the facts are.

Cervical cancer cases often benefit from a 2018 amendment commonly called Lavern's Law. It is named for Lavern Wilkinson, a Brooklyn mother whose lung cancer was missed until it was too late to treat. For a claim based on a negligent failure to diagnose cancer, the two-and-a-half-year period runs from the later of two dates: when you knew or reasonably should have known of the negligent act and the harm it caused, or the date of your last continuous treatment. The discovery rule has an outer limit of seven years from the negligent act.

This matters a great deal in cervical cancer cases. A woman may have had an abnormal result years before her diagnosis and only realize, once she gets her full records, that the follow-up was dropped long ago.

The continuous treatment rule can also delay the start of the clock. If you kept seeing the same gynecologist or practice for ongoing care of the same condition, the deadline may not begin to run until that treatment ended. That can matter for women who returned for annual exams, trusting their care was being managed, without knowing a critical result had slipped through.

If the missed follow-up happened at a public hospital or clinic, such as one run by NYC Health + Hospitals or a county, a formal notice of claim generally must be served within 90 days under General Municipal Law § 50-e. Because these timing rules are complicated and a missed deadline is permanent, it is worth talking to a lawyer early, even if you are not yet sure you have a case.

Why These Cases Need a Careful Medical Review

Building one of these cases means collecting complete records from every provider and lab involved over a period of years, not just the most recent visits. It means comparing what each Pap and HPV result showed against what the guidelines called for, given the patient's full history. And it means pinning down where the breakdown happened: a lab that never reported a result, a doctor who never reviewed it, an office with no tracking system, or a referral no one followed up on.

Under Public Health Law § 18, you have the right to request copies of your own medical records, which is often the first step. Few families can piece the rest together alone, and they should not have to.

Talk With a New York Cancer Lawyer

Learning that your cancer could have been caught years earlier, when it might have been a precancer instead of invasive disease, is one of the hardest things a person can face. Grief and anger at a system that was supposed to protect you are both natural. Porter Law Group's New York cancer lawyers work with board-certified medical experts to review these timelines, and you can see our results in delayed cancer diagnosis cases. Call 833-888-LATE or request a free case evaluation.

Attorney advertising. This article provides general information and is not legal or medical advice. Prior results do not guarantee a similar outcome. Filing deadlines depend on the facts of each case.

Frequently Asked Questions

What should happen after an abnormal Pap smear?

It depends on the result and your history. Under the 2019 ASCCP risk-based guidelines, your doctor combines the current result with past Pap and HPV results to estimate your risk of a serious precancer. If that risk is 4 percent or higher, you should be referred for colposcopy, which usually includes a biopsy. Lower-risk results call for repeat testing on a set schedule.

Does a positive HPV test mean I need a colposcopy?

Not always. A positive high-risk HPV test combined with an abnormal Pap usually calls for colposcopy. A positive test for HPV 16 or 18 is treated as higher risk even when the Pap is normal. Other combinations may call for repeat testing in a year. What matters is that someone acts on the result and documents the plan.

Is it malpractice if my doctor never followed up on an abnormal Pap?

It can be. A claim generally requires showing that the doctor, lab, or practice failed to follow accepted guidelines and that the failure let a precancer or early cancer progress. Common breakdowns include results never reaching the doctor, offices with no tracking system, and referrals no one confirmed. An expert review of your records is needed.

How long do I have to sue for a delayed cervical cancer diagnosis in New York?

Under Lavern's Law, part of CPLR 214-a, you generally have two years and six months from when you knew or should have known of the mistake and the harm it caused, or from your last continuous treatment. The outer limit is seven years from the missed follow-up. Public hospitals require a notice of claim within 90 days.

What are the current cervical cancer screening guidelines?

The American Cancer Society recommends starting at age 25 and continuing to at least 65. Primary HPV testing every five years is preferred. A self-collected HPV test every three years, co-testing every five years, or a Pap test every three years are also acceptable. Women with past abnormal results need a schedule based on their history.