BREAST CANCER MISDIAGNOSIS
Failure to Diagnose Breast Cancer Lawsuits
Medical professionals have a duty to identify cancer warning signs promptly. When healthcare providers overlook symptoms or fail to order appropriate diagnostic testing, patients may suffer devastating consequences including advanced disease progression, aggressive treatments, or reduced survival rates.
Delayed breast cancer diagnosis is one of the most commons forms of medical malpractice. The claim arises when the physician (typically a family practitioner/ surgeon/ dermatologist/ obstetrician or gynecologist) discount or fail to recognize the severity, the physician fails to properly read a radiology scan (Radiology Errors), or a physician or hospital fails to report the results or follow up with the patient.
The cancer then grows and advances to more critical stages that requires more severe treatment (mastectomy, radiation, chemotherapy) than would have been required had the cancer been diagnosed earlier. Moreover, the cancer can infiltrate the lymph nodes and cause a greater chance of recurrence further decreasing the chance of survival.
A medical malpractice case may provide answers to questions that the physician or hospital have been unwilling to provide, as well as provide for compensation for the misdiagnosis of cancer and all injuries that were caused by a Diagnostic Error and delay in treatment.
Joseph Lyon is a highly-rated, experienced, and passionate medical malpractice attorney handling hospital negligence and breast cancer misdiagnosis cases. For a free and confidential consultation call 800. 513. 2403 or complete the intake form. You will speak with Mr. Lyon directly.
Failure to Diagnose Breast Cancer
Confidential settlement for failure to timely diagnose breast cancer in a 39-year-old woman. As a result of the delay, the evidence demonstrated that the patient suffered a 50% increase in the likelihood of recurrence, which would ultimately return as terminal metastatic disease.
The failure to diagnose arose from the physician’s failure to communicate a positive biopsy which showed early stages of breast cancer. Had the biopsy been communicated the patient would have been treated with excision and avoided chemotherapy, mastectomy, and had a 95% chance of survival.
After two years of litigation, the parties reached a confidential settlement that accounted for medical bills, mastectomy, as well as all wrongful death damages.
Proving Misdiagnosis of Breast Cancer in Lawsuits
In all Medical Negligence cases, it is the Plaintiff’s (i.e, the patient) burden of proof. There are four legal elements to prove a medical malpractice case based on a misdiagnosis of breast cancer.
- Duty of Care (Physician/ Patient relationship)
- Negligence (breach of the standard of care )
- Causation (the injury must as a direct and proximate related to the negligence)
- Damages (physical and financial injuries )

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ABOUT THE LYON FIRM
Joseph Lyon has 17 years of experience representing individuals in complex litigation matters. He has represented individuals in every state against many of the largest companies in the world.
The Firm focuses on single-event civil cases and class actions involving corporate neglect & fraud, toxic exposure, product defects & recalls, medical malpractice, and invasion of privacy.
NO COST UNLESS WE WIN
The Firm offers contingency fees, advancing all costs of the litigation, and accepting the full financial risk, allowing our clients full access to the legal system while reducing the financial stress while they focus on their healthcare and financial needs.
Understanding the Standard of Care
In medical malpractice cases, the first question is whether the physician met the standard of care. This standard varies depending on the patient’s presentation, clinical findings, and follow-up actions. However, certain widely accepted guidelines apply to most cases.
Screening and Diagnosis Guidelines
Routine Screening
- Women over 40: Annual mammograms recommended
- Women ages 20-39: Clinical breast exams every three years
When a Mass is Detected
When a patient discovers a breast mass or lesion, the following steps should be taken:
- Initial monitoring: If the mass doesn’t resolve within one menstrual cycle, further investigation is required
- Diagnostic mammogram: Usually the first step to rule out malignancy
- Important note: A negative mammogram doesn’t conclusively rule out cancer when a suspicious mass can be felt
- Additional testing: Tissue biopsy or image-guided needle biopsy may be necessary, especially for solid masses
- Communication: Physicians must promptly interpret results, inform the patient, and order any needed follow-up tests
- Treatment timeline: Initial cancer treatment should begin within four months of diagnosis

Understanding Causation in Malpractice Cases
Proving causation requires demonstrating that earlier diagnosis would have resulted in a lower cancer stage and less aggressive treatment. This analysis depends heavily on timing and tumor characteristics.
Key Factors Affecting Causation
Delay Duration
- Delays under one year are harder to prove from a causation standpoint
- Delays beyond three months typically result in larger, more aggressive tumors
Tumor Characteristics
- Tumors 1.0 cm or smaller have very low recurrence rates
- As tumors grow, the risk of spreading to lymph nodes and distant sites increases
- ER-positive tumors generally have better outcomes than ER-negative tumors
- Larger tumors and lymph node involvement indicate worse prognosis
Special Considerations
- DCIS (Ductal Carcinoma In Situ) is pre-invasive and nearly always curable with local treatment
- Cancers in women under 40 tend to be more aggressive and require careful evaluation
Cancer Stages Explained
Carcinoma In Situ: Very early cancer confined to a small, local area
Stage I: Tumor no larger than 2 cm (about 1 inch) and hasn’t spread beyond the breast
Stage II: Tumor measures 2-5 cm (1-2 inches) and has spread to underarm lymph nodes
Stage III: Cancer larger than 5 cm, involves multiple underarm lymph nodes, and/or has spread to nearby tissue
Stage IV: Cancer has metastasized to other organs (commonly bones, liver, lungs, or brain)
Compensable Damages
Medical malpractice lawsuits based on breast cancer misdiagnosis may include compensation for:
- Reduced survival rate due to delayed diagnosis
- Mastectomy that could have been avoided
- Chemotherapy necessitated by delay
- Radiation treatment necessitated by delay
- Lost wages and diminished earning capacity
- Past and future medical expenses
- Wrongful death
Common Defense Arguments
Lack of Causation
Defense attorneys often argue that the delay didn’t affect treatment options, recurrence risk, or survival chances. They may claim the cancer was either already advanced at first presentation or still early-stage when diagnosed, attempting to show the patient suffered no additional harm from the delay.
Patient Responsibility
Physicians may argue the patient was instructed to follow up for test results but failed to do so, or that the patient didn’t notice or report tumor growth. While sensitive, these defenses can be effective when evidence supports them.
HMO Involvement
Health Management Organizations increasingly influence medical decisions, sometimes discouraging referrals or additional diagnostic tests. This can shift partial responsibility to the HMO or add them as an additional defendant.
Breast Density Issues
Physicians may claim dense breast tissue prevented accurate mammogram readings or clinical evaluation. However, this is a double-edged argument—it reinforces that a negative mammogram isn’t conclusive and that additional testing should have been ordered.
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Why Choose The Lyon Firm
Medical negligence cases involving cancer misdiagnosis require specialized knowledge and resources. The Lyon Firm brings extensive experience handling complex healthcare litigation, working with leading medical experts who can clearly explain how errors affected your prognosis.
Our attorneys understand the medical and legal intricacies of these cases. We invest significant time and resources into thorough investigation, obtaining all relevant records and consulting with specialists across multiple disciplines.
The Lyon Firm operates on a contingency basis, meaning you pay no attorney fees unless we secure compensation for you. This approach allows victims to pursue justice without financial risk. Our team provides compassionate support throughout the legal process while aggressively advocating for maximum recovery.
We recognize that no amount of money can restore your health, but fair compensation can ease financial burdens and hold negligent parties accountable. Contact The Lyon Firm today for a free case evaluation.
CONTACT THE LYON FIRM TODAY
Questions about Delayed Cancer Diagnosis
Statutes of limitations vary by state, typically ranging from one to three years from when you discovered or should have discovered the negligence. Consult an attorney promptly to protect your rights.
Negative imaging does not rule out malignancy, especially with dense breast tissue. Doctors should order additional testing when physical findings suggest cancer despite normal imaging results.
Watchful waiting may be inappropriate when clinical findings suggest possible malignancy. Medical standards generally require ruling out cancer definitively rather than simply monitoring suspicious findings.
Medical expert testimony establishes the standard of care and how your physician’s actions fell below that standard. Your attorney will work with specialists to analyze your records and demonstrate the connection between negligence and harm.
Compensation Available to Victims
Individuals harmed by diagnostic errors may recover multiple types of damages. Economic losses include past and future medical expenses, lost income, and diminished earning capacity. Non-economic damages address pain, suffering, emotional distress, and reduced quality of life.
When delayed diagnosis necessitates more aggressive treatment, patients can seek compensation for the additional procedures they must endure. Families who lose loved ones to preventable disease progression may pursue wrongful death claims.
The Lyon Firm aggressively, professionally, and passionately advocates for injured individuals and families against companies due to a defective product or recalled product to obtain just compensation under the law.
FAILURE TO DIAGNOSE BOWEL OBSTRUCTION
WRONGFUL DEATH
(Cincinnati, Ohio): Confidential settlement for a family due to a wrongful death. An emergency room physician failed to recognize the common symptoms associated with bowel obstruction and prescribed a contraindicated medicine of GoLytley. The patient died at home the day of discharge after taking the medication. The case against the emergency room physician was resolved by settlement following extensive discovery. The settlement was paid to the spouse and surviving adult children for the loss of their mother. While no amount of money could bring back their mother, the case provided answers and held the hospital accountable.
FAILURE TO DIAGNOSE BREAST CANCER
$910,000 Settlement.
(Cincinnati, Ohio): Joe Lyon was second chair in a case involving the failure of a physician to promptly communicate a positive breast cancer result to a patient. As a result of the delay, the cancer progressed from in situ carcinoma to stage 3B with lymph node involvement. The treatment required mastectomy and radiation/ chemotherapy rather than a simple excision. The case settled after extensive discovery. The defense argued: “the patient should have called the physician.” The settlement provided recovery for suffering through a misdiagnosis and the loss of a spouse and a mother. While the settlement cannot bring this wonderful woman back, it helped her family move forward with life’s challenges and encouraged future accountability.
Medical Malpractice Information Center
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