A wrong or delayed diagnosis can mean the difference between recovery and catastrophe. When a physician fails to identify your condition correctly — or identifies it too late — the consequences can be devastating: cancer that spreads beyond treatment, heart damage that becomes permanent, infections that turn fatal. You deserve an attorney who understands the medicine behind the mistake.
By Alex Alvarez, Board Certified Civil Trial Lawyer • Reviewed by Herb Borroto, M.D., J.D., Medical-Legal Expert • Last reviewed:
Diagnostic errors are among the most common forms of medical malpractice in the United States. According to research published in the journal BMJ Quality & Safety, an estimated 12 million Americans experience a diagnostic error in outpatient settings every year, and roughly half of those errors have the potential to cause harm. Understanding the different types of diagnostic failures is the first step toward holding negligent providers accountable.
Not every incorrect diagnosis constitutes malpractice. Medicine is inherently uncertain, and doctors must often work through complex symptoms that could point to multiple conditions. However, when a physician fails to follow the accepted diagnostic process — when they skip critical steps, ignore obvious warning signs, or fail to order standard tests — they cross the line from an honest mistake into a breach of the standard of care. That is when a diagnostic error becomes actionable malpractice.
The key question is not whether the doctor got the answer wrong, but whether they followed the right process to arrive at an answer. A physician who conducts a thorough differential diagnosis, orders appropriate tests, and still reaches an incorrect conclusion may not be liable. But a physician who anchors to the first possibility that comes to mind, ignores contradictory test results, or fails to refer to a specialist when the situation calls for it has failed their patient — and that failure can have life-altering consequences.
The physician identifies a condition, but it is the wrong one. For example, a doctor diagnoses a patient with acid reflux when they are actually experiencing the early symptoms of a heart attack, or labels persistent fatigue as depression when the patient is suffering from an undetected cancer. The patient receives treatment for a condition they do not have, while their real condition goes untreated and continues to worsen.
The physician eventually arrives at the correct diagnosis, but not soon enough. The delay allows the disease or condition to progress past the point where early intervention would have been most effective. In cancer cases, for instance, a delay of even a few months can mean the difference between a Stage I tumor that is highly treatable and a Stage III or IV cancer that has metastasized to distant organs.
The physician misses the condition entirely. The patient is told nothing is wrong, or is given a clean bill of health, when in reality a serious and potentially life-threatening condition exists. The patient leaves the doctor's office believing they are healthy, unaware that a disease is silently progressing. By the time symptoms become undeniable and another provider catches what was missed, the window for effective treatment may have closed.
Certain medical conditions are misdiagnosed with alarming frequency. When these errors occur, the consequences are often severe — because these are precisely the conditions where early detection and timely treatment matter most. The following are among the most commonly misdiagnosed conditions we see in our practice.
Cancer is one of the most frequently misdiagnosed conditions in the United States, with breast cancer, lung cancer, and colorectal cancer ranking among the most commonly missed. A delayed cancer diagnosis can allow the disease to metastasize — spreading from a localized, treatable tumor to distant organs where treatment options become limited and survival rates plummet.
When a physician dismisses a suspicious lump as a benign cyst, fails to order a biopsy on an abnormal mammogram, or attributes persistent gastrointestinal symptoms to irritable bowel syndrome without further workup, the patient loses precious time. Months or even weeks of delay can shift a cancer diagnosis from one that is curable to one that is terminal.
Heart attacks are frequently misdiagnosed, particularly in women and younger patients who may present with atypical symptoms. Instead of the classic chest-clutching presentation, many heart attack patients experience jaw pain, nausea, shortness of breath, or upper back discomfort — symptoms that are often dismissed as anxiety, acid reflux (GERD), or musculoskeletal pain.
When emergency room physicians or primary care providers fail to order an EKG, cardiac enzymes, or troponin levels in a patient presenting with these symptoms, the result can be catastrophic. Heart muscle dies with every minute of delay. Patients who should have received immediate cardiac intervention are instead sent home with antacids or a prescription for anti-anxiety medication, only to suffer a massive or fatal cardiac event hours later.
Stroke is a medical emergency where every minute counts. The clot-busting drug tPA must be administered within a narrow time window — typically 3 to 4.5 hours from symptom onset — to be effective. When a stroke is misdiagnosed as a migraine, vertigo, intoxication, or inner ear infection, that window closes, and the patient is left with permanent brain damage that could have been prevented or significantly minimized.
Younger patients and those presenting with posterior circulation strokes (affecting the back of the brain) are especially vulnerable to misdiagnosis, as their symptoms — dizziness, difficulty walking, visual disturbances — can mimic less serious conditions. A physician who fails to perform a thorough neurological examination and appropriate imaging in these cases is failing the standard of care.
Sepsis kills more than 270,000 Americans every year, and it is one of the most time-sensitive diagnoses in medicine. What begins as a localized infection — a urinary tract infection, a surgical wound infection, pneumonia — can escalate into sepsis within hours, triggering a cascade of organ failure that is often irreversible once it has progressed.
The tragedy of sepsis cases is that early intervention with appropriate antibiotics and fluid resuscitation is highly effective when initiated promptly. But when providers dismiss early warning signs — elevated heart rate, fever, altered mental status, abnormal white blood cell counts — as something less serious, patients deteriorate rapidly. Every hour of delayed antibiotic administration in sepsis increases mortality significantly.
Appendicitis is commonly misdiagnosed as gas pain, constipation, gastroenteritis, ovarian cysts, or urinary tract infections. While appendicitis is a relatively straightforward surgical condition when caught early, a missed or delayed diagnosis can result in a ruptured appendix, leading to peritonitis — a life-threatening infection of the abdominal cavity that requires emergency surgery and prolonged hospitalization.
Women and children are particularly at risk for appendicitis misdiagnosis. In women of childbearing age, symptoms are frequently attributed to gynecological causes. In young children, the inability to clearly articulate their symptoms combined with atypical presentations leads to higher rates of perforation before the correct diagnosis is made.
A pulmonary embolism (PE) — a blood clot that travels to the lungs — is one of the most commonly missed diagnoses in emergency medicine. PE can present with vague symptoms such as shortness of breath, chest pain, rapid heartbeat, or a cough, and is frequently misdiagnosed as pneumonia, anxiety, asthma, or a pulled muscle. Without treatment, a PE can be fatal within hours.
The diagnostic tools for identifying a PE — D-dimer blood tests, CT pulmonary angiography — are widely available and well-established. When a physician fails to consider PE in their differential diagnosis despite the presence of known risk factors (recent surgery, prolonged immobility, oral contraceptive use, history of deep vein thrombosis), that failure represents a clear departure from the standard of care.
A correct diagnosis depends on a physician following a rigorous, systematic process. When that process breaks down — at any step — the patient pays the price. Understanding how diagnostic errors occur is essential to proving that a provider's failure was not simply an unfortunate outcome, but a breach of the standard of care. The following are the most common breakdowns we identify in misdiagnosis cases.
A patient presents with symptoms that should trigger specific diagnostic tests — blood work, imaging studies, biopsies — but the physician never orders them. A patient with rectal bleeding should receive a colonoscopy. A patient with a persistent cough and risk factors for lung cancer should receive chest imaging. When physicians skip these fundamental steps, conditions that would have been caught early go undetected until they have advanced significantly.
Sometimes the right tests are ordered, but the results are interpreted incorrectly. A radiologist may miss a tumor on a CT scan. A pathologist may misclassify a biopsy sample. A primary care physician may overlook an abnormal lab value buried in a panel of results. These errors are particularly insidious because the patient believes the diagnostic workup has been completed, and both patient and provider proceed under a false sense of security.
Test results come back with abnormal findings, but no one acts on them. Lab reports get lost in the system. Radiology findings that recommend further evaluation are filed away without being communicated to the patient. A physician notes an abnormality but decides to "watch and wait" without scheduling the necessary follow-up. In each of these scenarios, the diagnostic opportunity was there — the system simply failed to act on it.
Anchoring bias occurs when a physician locks onto an initial diagnosis early in the evaluation and fails to adjust their thinking even when new information contradicts it. Once a doctor decides a patient has a particular condition, confirmation bias takes over: they seek information that supports their initial impression and discount evidence that points elsewhere. This cognitive trap is one of the leading causes of diagnostic error, and it is one that a well-trained physician is expected to guard against.
A thorough patient history is the foundation of any diagnostic workup. When a physician rushes through the intake process, fails to ask about family history of disease, ignores the patient's description of symptoms, or does not review prior medical records, critical information is missed. A family history of colon cancer changes the urgency of evaluating GI symptoms. Prior imaging results may reveal a pattern of growth that a single snapshot cannot. Cutting corners on patient history leads directly to missed diagnoses.
Primary care physicians are generalists by training. They are expected to recognize when a patient's symptoms or test results fall outside their area of expertise and to refer the patient to an appropriate specialist for further evaluation. When a primary care doctor attempts to manage a complex cardiac, neurological, or oncological concern without involving the right specialist, diagnostic errors are far more likely. The failure to refer is often the failure that costs patients the most time — and in medicine, time is everything.
Most medical malpractice attorneys have never set foot in a medical school. They rely entirely on outside medical experts to explain what went wrong. They read medical records, but they do not truly understand them the way a physician does. Herb Borroto, M.D., J.D. is fundamentally different.
Because Herb completed medical school and clinical training before earning his law degree, he understands the diagnostic process from the inside. He knows how a differential diagnosis is constructed. He knows which tests are standard for which symptoms. He understands the clinical decision-making that goes into narrowing a differential — the process of systematically ruling conditions in or out based on test results, patient history, and clinical presentation.
This dual expertise means that when Herb reviews your medical records, he does not just identify that a mistake was made. He identifies exactly where the diagnostic process broke down, why it constitutes a departure from the standard of care, and how a competent physician in the same specialty would have handled your case differently. That level of precision is what separates a strong misdiagnosis claim from one that falls apart under scrutiny.
When your case involves a missed cancer diagnosis, a failure to recognize the signs of a stroke, or a delayed diagnosis that allowed a treatable infection to become sepsis, you need an attorney who does not have to wait for an expert to explain the medicine. You need an attorney who is the medical expert. That is the advantage Herb Borroto, M.D., J.D. and The Alvarez Law Firm bring to every misdiagnosis case.
Herb does not need a translator to understand your medical charts, lab results, imaging reports, or operative notes. He reads them the way the treating physicians wrote them — with full clinical comprehension.
Instead of broadly claiming something went wrong, Herb identifies the specific step in the diagnostic process where the physician deviated from the standard of care — whether it was a failure to consider a condition on the differential, a missed test, or an ignored result.
When medical experts are retained for trial, Herb evaluates their opinions with the same critical eye he was trained to use in clinical medicine. He can distinguish between genuine standard-of-care violations and defense experts offering opinions designed to protect a colleague.
Complex medical concepts lose cases when juries cannot understand them. Herb translates the clinical details of your misdiagnosis into clear, compelling narratives that judges and jurors can follow — because he has lived on both sides of the medical and legal divide.
The impact of a missed or delayed diagnosis extends far beyond the initial error. Every day that passes without the correct diagnosis is a day the disease progresses, treatment options narrow, and the patient's prognosis worsens. The consequences are not abstract — they are measured in stages of cancer, percentages of organ function, and years of life lost.
When cancer is caught at Stage I, survival rates for many cancers exceed 90%. By Stage IV, those numbers can drop below 20%. A diagnostic delay that allows cancer to progress from an early, localized stage to a late, metastatic stage fundamentally changes the patient's prognosis. Treatments that would have been curative become palliative. Surgeries that would have been straightforward become impossible. The five-year survival window that was once open begins to close. This is not a statistical abstraction — it is the lived reality of patients whose cancers were caught too late because a physician failed to order a standard screening, dismissed a warning symptom, or delayed a referral.
Many conditions, if left untreated, cause progressive and irreversible damage to vital organs. An undiagnosed heart attack leads to permanent heart muscle death. An undetected stroke causes brain cells to die at a rate of nearly two million per minute. Untreated infections can cause kidney failure, liver damage, or systemic organ shutdown. Autoimmune conditions that go undiagnosed erode joint tissue, damage nerves, or attack internal organs over months and years. In each case, the damage that accumulates during the diagnostic delay is damage that could have been prevented with timely and accurate medical care.
When a patient is misdiagnosed, they often undergo treatments for a condition they do not have. These treatments can be invasive, painful, expensive, and carry their own risks of side effects and complications. A patient treated for asthma when they actually have a pulmonary embolism receives medications that do nothing to address the blood clot threatening their life. A patient treated with antidepressants for what is actually a thyroid disorder suffers the side effects of psychiatric medication while their underlying condition continues to deteriorate. The harm is compounded: the patient suffers from the wrong treatment and from the untreated actual condition.
In the most devastating cases, a diagnostic error costs a patient their life. A wrongful death caused by misdiagnosis leaves families shattered — not only by the loss itself, but by the knowledge that the death was preventable. If the cancer had been caught six months earlier. If the heart attack had been recognized in the emergency room. If the infection had been treated before it became sepsis. These are not hypotheticals. They are the cases we handle, and they represent the most profound failure of the medical system: a patient who trusted their doctor, followed instructions, and died because the diagnosis was wrong.
If you believe you or a loved one was harmed by a misdiagnosis or delayed diagnosis, you likely have questions about your rights and options. The following answers address some of the most common concerns we hear from prospective clients. For answers specific to your situation, contact us for a free case review.
Every factual claim on this page is supported by a verifiable public source. Click any source below to read the original.
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If a misdiagnosis or delayed diagnosis caused you or your loved one serious harm, you deserve an attorney who understands both the medicine and the law. Herb Borroto, M.D., J.D. will review your medical records with a physician's eye and give you an honest assessment of your case.
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