14 real-world medical malpractice examples
Cancer misdiagnosis · Example 1
Breast cancer mistaken for benign cyst
A 42-year-old woman's mammogram showed a suspicious mass. The radiologist read it as a benign cyst and recommended no follow-up. Eighteen months later she was diagnosed with stage III invasive ductal carcinoma after the mass grew visibly. A second radiologist confirmed the original image was clearly malignant. Standard-of-care violation: failure to recommend biopsy of a BI-RADS 4 lesion.
Stroke misdiagnosis · Example 2
ER misses a stroke, calls it vertigo
A 58-year-old man presented to the ER with sudden dizziness, slurred speech, and right-sided weakness. The ER physician diagnosed inner-ear vertigo, gave him meclizine, and discharged him without imaging. He returned 22 hours later with completed left-MCA stroke — well past the tPA window. Standard-of-care violation: failure to perform NIH stroke scale and CT in a patient with focal neuro deficits.
Surgical error · Example 3
Retained surgical sponge
After a routine hysterectomy, the patient developed fevers and abdominal pain. CT scan three weeks post-op revealed a retained laparotomy sponge requiring a second surgery and a six-month recovery. Standard-of-care violation: failure to perform the mandatory sponge count before closing.
Wrong-site surgery · Example 4
Wrong knee replaced
A 67-year-old man scheduled for a left total knee arthroplasty had his right (healthy) knee replaced. The error was discovered post-op when he awoke with the wrong leg in a brace. Standard-of-care violation: failure to follow the Universal Protocol time-out and surgical-site marking.
Birth injury · Example 5
Delayed C-section causes brain injury
Fetal heart monitoring showed late decelerations for 90 minutes during labor. The OB was paged but did not arrive for 75 minutes. The baby was delivered via emergency C-section with severe hypoxic-ischemic encephalopathy and was later diagnosed with cerebral palsy. Standard-of-care violation: failure to respond to non-reassuring fetal heart tracings.
Erb's palsy · Example 6
Shoulder dystocia mismanaged
During a vaginal delivery, the baby's shoulder lodged behind the mother's pubic bone. The provider applied excessive lateral traction on the baby's head, tearing the brachial plexus and leaving the infant with permanent right-arm weakness. Standard-of-care violation: failure to use proper shoulder-dystocia maneuvers (McRoberts, suprapubic pressure).
Medication error · Example 7
Wrong-dose insulin in the hospital
A nurse misread an order and administered 50 units of insulin instead of 5 units. The patient suffered profound hypoglycemia, a seizure, and permanent cognitive impairment. Standard-of-care violation: failure to perform independent double-check for high-alert medication.
Pharmacy error · Example 8
Wrong drug dispensed at pharmacy
A patient prescribed methotrexate weekly for rheumatoid arthritis received a label instructing daily dosing. After ten days of overdose, the patient was hospitalized with pancytopenia and mucositis. Standard-of-care violation: failure to verify dosing frequency at the pharmacy counter.
Anesthesia error · Example 9
Unrecognized esophageal intubation
During a routine outpatient surgery, the anesthesiologist intubated the esophagus instead of the trachea and failed to recognize the absence of end-tidal CO2. The patient suffered anoxic brain injury before the error was corrected. Standard-of-care violation: failure to confirm tube placement with capnography.
ER negligence · Example 10
Heart attack sent home with antacids
A 51-year-old woman presented to the ER with chest pressure radiating to her jaw, nausea, and shortness of breath. The ER physician diagnosed reflux and discharged her with omeprazole. She collapsed at home eight hours later from a massive MI. Standard-of-care violation: failure to order serial troponins and ECG in a patient with classic cardiac symptoms.
Hospital infection · Example 11
Hospital-acquired MRSA after hip replacement
Two weeks after a total hip replacement, the patient developed a deep-joint MRSA infection requiring removal of the prosthesis, six weeks of IV antibiotics, and a second surgery. Standard-of-care violation: failure to follow surgical-site infection-prevention protocols.
Sepsis · Example 12
Sepsis missed on the floor
A post-op patient developed tachycardia, fever, and confusion. Nursing flagged the changes; the on-call physician did not assess for 9 hours. By the time sepsis was recognized, the patient was in septic shock and required ICU care and amputation of both feet. Standard-of-care violation: failure to follow institutional sepsis bundle and early-goal-directed therapy.
Failure to diagnose · Example 13
Appendicitis missed in the ER
A 24-year-old man presented twice in 36 hours with right lower quadrant pain. Both visits, the ER ordered no imaging and discharged him with 'gastroenteritis.' He returned the third time in septic shock from a ruptured appendix. Standard-of-care violation: failure to image classic appendicitis presentation.
Wrongful death · Example 14
Pulmonary embolism missed post-surgery
Three days after knee surgery, a patient developed sudden shortness of breath. The surgeon dismissed it as anxiety. The patient died at home that night of a massive pulmonary embolism. Standard-of-care violation: failure to evaluate post-operative dyspnea for VTE.
A bad outcome isn't always malpractice
Medicine carries real risk and many serious complications happen even with proper care. To be malpractice, a provider must have departed from what a reasonably competent provider in the same specialty would have done — and that departure must have caused the harm. Read more about what medical malpractice is and the warning signs to watch for.