Is Breast Cancer Misdiagnosis Medical Malpractice?

Gregg Hollander | November 4, 2026 | Medical Malpractice

Learning that breast cancer may have been present during an earlier appointment can change how you understand every decision that followed. Questions about a missed mammogram finding or an unexplained lump now sit alongside decisions about surgery, treatment, and your family’s future. You deserve a careful assessment of whether a breast cancer misdiagnosis caused harm that appropriate care could have prevented.

At Hollander Law Firm, Gregg Hollander and our team have represented injured South Floridians since 1996. Our work includes serious medical negligence cases involving permanent injuries and wrongful death. We can investigate your earlier care, evaluate the effect of any delay, and explain whether you have grounds to pursue compensation.

For a free consultation, please fill out our online form or call (561) 347-7770 today.

What Is a Misdiagnosis of Breast Cancer?

A misdiagnosis occurs when a healthcare provider mistakes breast cancer for another condition. For example, inflammatory breast cancer can cause redness and swelling that resemble mastitis, a breast infection. A patient may then receive antibiotics while the cancer goes untreated.

Suspecting an infection is not necessarily unreasonable, as symptoms can overlap. The concern arises when symptoms persist, but the provider continues treating the presumed infection without investigating whether cancer could be the cause.

What Is a Delayed Breast Cancer Diagnosis?

A delayed diagnosis occurs when breast cancer is identified after an earlier opportunity to detect it was missed. A misdiagnosis of breast cancer can cause this delay, but so can a failure to arrange a recommended biopsy after an abnormal mammogram. In both situations, the patient waits longer for a diagnosis and the treatment that depends on it.

During that time, cancer may grow or spread, potentially changing the treatment needed. Whether this happened in your case requires medical review. A delay does not automatically mean the outcome would have been different. That distinction matters because a malpractice claim must connect the provider’s failure to additional harm.

Can Delayed Diagnosis or Misdiagnosed Breast Cancer Qualify as Medical Malpractice?

Yes, but an incorrect or delayed diagnosis alone does not establish malpractice. In Florida, you must show that your provider failed to meet accepted medical standards and that this failure caused harm.

There are four key elements required to prove medical malpractice.

Duty of Care: Establishing the Provider’s Responsibility

A duty of care is a healthcare provider’s legal obligation to provide care that meets accepted medical standards. This duty generally arises when the provider accepts responsibility for your evaluation, diagnosis, or treatment. Under Florida law, they must use the care and skill expected of a reasonably careful provider in the same field under similar circumstances.

Breach of Duty: Showing That the Care Fell Below Medical Standards

A breach occurs when a provider fails to meet the standard expected of a reasonably careful professional in similar circumstances. For example, a breast cancer misdiagnosis case might involve overlooking a suspicious finding or failing to pursue a medically necessary biopsy. At The Hollander Law Firm, we can compare the original images, reports, referral records, and patient communications with the steps the provider took.

A qualified medical expert can then explain what appropriate care is required and where the provider fell short.

Causation: Proving That the Error Changed Your Outcome

Causation means proving that the deviation from the standard of care caused additional harm. This can be the hardest element to establish because the provider may argue that you would have faced the same outcome even with an earlier diagnosis. Florida requires evidence that the negligence more likely than not caused the harm; showing that earlier care might have helped is not enough.

To address that question, our law firm can work with a cancer specialist to review your mammograms, biopsy results, and treatment records. The specialist can use this evidence to assess whether timely diagnosis and treatment probably would have prevented the cancer from spreading, avoided more extensive surgery, or prevented another lasting injury.

Damages: Documenting the Harm Suffered in Breast Cancer Misdiagnosis Claims

You must also have actual losses resulting from the negligent care. For patients with misdiagnosed breast cancer, the claim should distinguish treatment that would have been necessary anyway from added costs and injuries attributable to negligent care.

Potential damages could include:

  • Additional medical care and assistance. This can include more extensive surgery, reconstruction, rehabilitation, medications, and home nursing made necessary by the added harm. Future expenses should reflect medically supported care needs.
  • Lost income and earning ability. Compensation may address earnings lost during additional treatment and a reduced ability to work in the future. Employment records and medical opinions help document those losses.
  • Pain, disability, and disfigurement. A claim may address lasting physical limitations, surgical changes, emotional distress, and loss of enjoyment of life. These losses can matter even when they do not appear on a medical bill.

Calculating breast cancer misdiagnosis compensation requires attention to both the misdiagnosis’s financial burden and the lasting effects it has on your daily life. We work with medical and financial professionals when needed to assess future losses rather than limiting the claim to expenses already incurred.

What Are Examples of Breast Cancer Malpractice?

Malpractice may occur when a provider incorrectly rules out breast cancer despite findings that require further investigation. That mistaken conclusion can stop necessary testing or leave you receiving treatment for the wrong condition while the cancer remains undetected.

Here are some scenarios that may constitute breast cancer malpractice:

  • Labeling a cancerous lump as a benign growth. A doctor diagnoses a lump as noncancerous without arranging the testing needed to support that conclusion. Even a normal mammogram may not justify dismissing a lump when the physical examination still raises concern.
  • Incorrectly interpreting a mammogram as normal. A radiologist overlooks an abnormality that a reasonably careful radiologist should have recognized as suspicious. The incorrect report may reassure the treating physician and patient that no additional testing is needed, leaving the cancer undiagnosed.
  • Continuing to mistake inflammatory breast cancer for an infection. A doctor diagnoses mastitis, a breast infection, but does not reconsider that diagnosis when redness and swelling persist despite antibiotics. Failing to investigate those continuing symptoms can allow the incorrect diagnosis to stand while cancer goes untreated.
  • Misinterpreting breast biopsy tissue. A pathologist incorrectly identifies cancerous tissue as noncancerous, producing an inaccurate biopsy report. Because treatment decisions depend on that report, the error can prevent the patient from receiving the cancer care they need.
  • Accepting a benign biopsy result that does not explain the suspicious imaging. A doctor concludes that a breast abnormality is harmless without addressing the conflict between the biopsy and imaging results. Additional tissue sampling may be necessary to determine whether the biopsy missed the cancer.

Importantly, a later cancer diagnosis does not automatically make a healthcare provider’s earlier diagnosis negligent. A Florida claim must establish that the provider failed to meet accepted medical standards and that this failure caused harm, rather than relying solely on the difference between the two diagnoses.

FAQs

Does a Normal Mammogram Mean There Was No Negligence?

No, because appropriate care may require further evaluation of a concerning symptom even after normal imaging. Some cancers are difficult to see on mammograms, particularly in dense breast tissue. An ultrasound may be needed despite a normal mammogram, depending on the clinical findings. The legal question is whether the provider responded appropriately to the information available, not simply whether the report said “negative.” A normal result alone neither establishes malpractice nor rules it out.

Who Is Responsible When My Tests Were Done at Different Facilities?

Your claim may be against an individual doctor, a hospital, or a testing facility, or several of them. Having breast cancer tests at different locations does not prevent you from pursuing claims against multiple parties whose negligence contributed to your delayed diagnosis and resulting harm.

Determining who should be included requires examining each provider’s responsibilities and the relationships between the doctors and facilities. At The Hollander Law Firm, we can gather records from every location and work with medical experts to determine where your care fell short and who may be legally responsible.

Should I Wait Until Treatment Ends to Contact a Lawyer?

No. Ongoing treatment does not pause Florida’s filing deadlines. You generally have two years from the incident, or two years from when you discovered, or reasonably should have discovered, the malpractice. But you cannot bring a claim more than four years after the date of the alleged malpractice, regardless of when you discovered the harm.

Missing the applicable deadline can lead to dismissal, leaving you unable to recover compensation. An early legal review allows your attorney to protect the claim while your doctors continue evaluating treatment and long-term needs.

Considering legal action while managing cancer treatment can feel like another demand on your time and energy. At Hollander Law Firm, we can explain what pursuing a claim would involve, what our team would handle, and where your participation would be needed.

We take time to understand your concerns and how your life has been affected, rather than treating your medical records as the whole story. When evaluating breast cancer misdiagnosis claims, we can discuss what the evidence supports, what questions remain, and what those findings mean for your legal options.

Contact us online or call (561) 347-7770 today for a free consultation. Bring your concerns about the diagnosis and the legal process into that conversation so we can help you make an informed decision about whether to proceed.

Legal References Used to Inform This Page

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