Suing Memorial Sloan Kettering (MSK) for Cancer Misdiagnosis in NY

About Memorial Sloan Kettering Cancer Center

Memorial Sloan Kettering Cancer Center was founded in 1884 and is the oldest and largest private cancer center in the world. MSK includes: - Memorial Hospital — the inpatient and outpatient treatment facility on the Upper East Side of Manhattan. - SKI (Sloan Kettering Institute) — the basic and translational research arm. - MSK regional sites — including locations in Westchester, Long Island, New Jersey, and Connecticut. - MSK Pediatrics — pediatric cancer treatment at Memorial Hospital and through partnerships with NewYork-Presbyterian.

MSK employs over 1,400 physicians and handles over 15,000 new cancer cases each year. It is consistently ranked among the top cancer hospitals in the United States. While MSK's reputation for excellence is well-deserved, this does not mean errors don't occur — and when they do, the consequences for cancer patients can be catastrophic. [Link to: /hospital-negligence/suing-nyu-langone] [Link to: /hospital-negligence/suing-new-york-presbyterian]

When MSK's Standard of Care Falls Short

At a major cancer center like MSK, the standard of care is particularly high — patients expect, and are entitled to, the highest level of diagnostic and treatment expertise. When MSK physicians fail to meet this standard, the gap between expected care and actual care can be stark. Common areas where the standard of care may fall short include:

• Pathology errors: Misinterpreting biopsy specimens — leading to wrong diagnoses, wrong cancer types, or wrong treatment plans. Pathology is the foundation of cancer diagnosis — and errors at this stage cascade through the entire treatment.
• Radiology errors: Misinterpreting imaging studies (CT, MRI, PET, mammography) — missing tumors, underestimating tumor size, or failing to identify metastasis. [Link to: /radiology-errors/mri-malpractice] [Link to: /radiology-errors/communication-failures]
• Delayed diagnosis: Failing to order appropriate tests, failing to follow up on abnormal results, or failing to refer to specialists — allowing cancer to progress. [Link to: /delayed-diagnosis-lawyer/new-york]
• Treatment errors: Surgical errors, chemotherapy dosing errors, radiation therapy errors, or failure to follow established treatment protocols. [Link to: /surgical-error-lawyer] [Link to: /medication-errors/chemotherapy-dosing-errors]
• Failure to obtain informed consent: Not adequately explaining the risks of treatment — particularly experimental treatments, clinical trials, or aggressive therapies. [Link to: /surgical-errors/informed-consent]
• Failure to communicate: Not communicating critical findings between departments — pathology, radiology, oncology, and surgery — leading to treatment delays or errors. [Link to: /radiology-errors/communication-failures]
• Failure to refer: Not referring patients to appropriate specialists within MSK or to outside institutions when needed.
• Research-related errors: Errors in clinical trials — including inadequate informed consent, failure to monitor, or protocol violations.

Cancer Misdiagnosis at MSK: How It Happens

Cancer misdiagnosis at MSK can occur through several mechanisms — and the consequences are particularly severe because patients come to MSK for definitive cancer care.

Types of cancer misdiagnosis:

• False positive diagnosis: Telling a patient they have cancer when they don't — leading to unnecessary chemotherapy, radiation, or surgery, with devastating physical and psychological consequences.
• False negative diagnosis: Telling a patient they don't have cancer when they do — allowing the cancer to progress untreated, often to an advanced, incurable stage.
• Wrong cancer type: Misidentifying the type of cancer — leading to the wrong treatment. Different cancers require different chemotherapy regimens, radiation protocols, and surgical approaches.
• Wrong stage: Misidentifying the stage of the cancer — leading to under-treatment (allowing cancer to progress) or over-treatment (causing unnecessary harm). [Link to: /misdiagnosis/stage-migration]
• Wrong biomarker status: Many modern cancer treatments target specific biomarkers (e.g., HER2 for breast cancer, EGFR for lung cancer, BRAF for melanoma). Misidentifying biomarker status leads to wrong — and often ineffective — treatment.
• Delayed diagnosis: Correctly diagnosing the cancer — but only after a significant delay that allowed the disease to progress. [Link to: /delayed-diagnosis-lawyer/new-york]

Pathology Errors at Major Cancer Centers

Pathology is the cornerstone of cancer diagnosis. A pathologist examines tissue specimens (from biopsies or surgery) under a microscope — determining whether cancer is present, what type it is, how aggressive it is (grade), and other critical characteristics. When pathology errors occur at a major cancer center, the consequences cascade through the entire treatment plan.

Common pathology errors:

• Misinterpretation of biopsy specimens: Misreading the cellular characteristics of a tumor — leading to wrong diagnosis, wrong type, or wrong grade. [Link to: /medical-malpractice/pathology-errors] [Link to: /misdiagnosis/pathology-biopsy-errors]
• Sampling errors: Not examining enough of the specimen — or not sampling the right areas — leading to missed cancer.
• Immunohistochemistry errors: Misinterpreting or misapplying special stains (immunohistochemistry) used to identify specific cancer types and biomarkers.
• Molecular testing errors: Errors in genomic or molecular testing — leading to wrong biomarker status and wrong targeted therapy.
• Specimen handling errors: Improper fixation, processing, or labeling of specimens — compromising the diagnosis.
• Failure to obtain second opinion: In complex or ambiguous cases, the standard of care may require obtaining a second pathology opinion — and failure to do so can constitute negligence.

Radiology and Imaging Errors

Radiology plays a critical role in cancer diagnosis and monitoring — and radiology errors at MSK can have devastating consequences:

- Missed tumors: The radiologist fails to identify a visible tumor on imaging — delaying diagnosis and treatment. - Underestimation of tumor size: Misreading the size of a tumor — leading to under-staging and under-treatment. - Missed metastasis: Failing to identify cancer spread to lymph nodes, liver, lungs, bones, or brain — leading to wrong staging and wrong treatment. - Failure to compare prior scans: Not comparing current imaging to prior studies — missing subtle changes that indicate cancer growth or progression. [Link to: /radiology-errors/failure-to-compare] - Communication failures: The radiologist identifies an abnormality but fails to communicate it to the treating oncologist — leading to delayed diagnosis. [Link to: /radiology-errors/communication-failures]

Radiology errors at a major cancer center are particularly significant because patients rely on MSK's imaging expertise for definitive cancer diagnosis and monitoring. [Link to: /radiology-errors/mri-malpractice]

Treatment Errors at MSK

Treatment errors at a major cancer center can cause catastrophic harm — particularly when they involve complex, aggressive, or experimental treatments:

• Surgical errors: Errors in cancer surgery — including incomplete tumor removal (positive margins), damage to surrounding organs or nerves, wrong-site surgery, or surgical complications. [Link to: /surgical-error-lawyer] [Link to: /medical-malpractice/wrong-site-surgery]
• Chemotherapy dosing errors: Overdosing or underdosing chemotherapy — causing severe toxicity or ineffective treatment. [Link to: /medication-errors/chemotherapy-dosing-errors]
• Radiation therapy errors: Incorrect radiation dose, wrong treatment field, or wrong treatment duration — causing radiation injury to healthy tissue or ineffective cancer treatment. [Link to: /radiology-errors/radiation-oncology]
• Chemotherapy extravasation: Chemotherapy drugs leaking from the IV into surrounding tissue — causing severe tissue damage and requiring surgical treatment. [Link to: /medical-malpractice/chemotherapy-extravasation]
• Failure to follow treatment protocols: Not following established, evidence-based treatment protocols — or using unproven treatments without adequate informed consent.
• Clinical trial errors: Errors in clinical trials — including inadequate informed consent, failure to monitor, protocol violations, or failure to report adverse events.
• Failure to coordinate care: Not coordinating care between departments — surgery, medical oncology, radiation oncology — leading to treatment delays or errors.

The Notice of Claim Requirement: Does It Apply to MSK?

No. Memorial Sloan Kettering is a private, nonprofit institution — not a municipal hospital. This means the special municipal requirements do not apply: - No 90-day Notice of Claim is required (unlike NYC Health + Hospitals municipal facilities). [Link to: /wrongful-death/notice-of-claim-nyc] - The statute of limitations is the standard 2.5 years under CPLR § 214-a — not the shortened 1 year and 90 days that applies to municipal hospitals.

This gives patients more time to file a lawsuit against MSK — but do not wait. Cancer misdiagnosis cases are complex, and building a strong case takes time — including obtaining and reviewing extensive medical records, engaging qualified oncology experts, and preparing the certificate of merit required under CPLR § 3012-a. [Link to: /hospital-negligence/private-vs-public-hospitals]

Proving Causation in Cancer Misdiagnosis Cases

Proving that cancer misdiagnosis or treatment errors at MSK caused harm requires establishing:

1. The standard of care was breached: Expert testimony from a qualified oncologist, pathologist, or radiologist — that MSK physicians failed to meet the standard of care in diagnosing or treating the cancer.

2. The breach caused the harm: Expert testimony linking the misdiagnosis or treatment error to the patient's harm — typically, that earlier or correct diagnosis would have led to a better outcome. This often involves: - Stage migration: Showing that the delay caused the cancer to progress to a more advanced stage. [Link to: /misdiagnosis/stage-migration] - Loss of chance: Showing that the error reduced the patient's probability of survival or better outcome. [Link to: /misdiagnosis/loss-of-chance] [Link to: /delayed-diagnosis-lawyer/loss-of-chance]

3. The patient suffered damages: Including additional medical expenses, lost wages, pain and suffering, loss of chance of survival, and — in wrongful death cases — damages for the family.

The defense will argue that cancer is unpredictable, that the outcome would have been the same even with correct diagnosis, or that the patient's underlying cancer was the primary cause. Expert testimony is required to counter these arguments. [Link to: /misdiagnosis/differential-diagnosis]

New York Statute of Limitations and Lavern's Law

Because MSK is a private institution, the standard 2.5-year statute of limitations applies (CPLR § 214-a). However, Lavern's Law (CPLR § 214-a) provides a critical exception for cancer misdiagnosis cases:

- 2.5 years from the date of discovery — the clock starts when the patient discovered (or reasonably should have discovered) the misdiagnosis. - 7-year outer limit — the claim is barred after 7 years from the date of the negligent act, regardless of when it was discovered.

The continuous treatment doctrine may also extend the deadline — particularly relevant at MSK, where patients often receive years of ongoing treatment from the same oncology team. If you continued receiving treatment from the same MSK physicians for the same cancer, the clock may not start until treatment ends.

For wrongful death, the deadline is 2 years from the date of death (EPTL § 5-4.1). [Link to: /misdiagnosis/laverns-law] [Link to: /medication-errors/statute-of-limitations] [Link to: /wrongful-death/statute-of-limitations]

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.