Medical Diagnoses in Grey's Anatomy: A Comprehensive Review of Medical Conditions in Season 1
- Mar 27
- 11 min read
Updated: May 8

Grey's Anatomy began its celebrated run by introducing audiences to the high-stakes world of surgical interns at Seattle Grace Hospital. Season 1 immersed viewers in the formative experiences of Meredith Grey and her colleagues as they balanced demanding schedules, competitive pressures, and budding relationships. Alongside these personal and professional dramas, the inaugural season laid the groundwork for the show's medical focus, presenting a compelling array of patient cases that challenged the interns' nascent skills and ethical compasses. This section aims to catalog and summarize the primary medical diagnoses featured in each episode of Season 1, offering a foundational look at the types of conditions encountered as the series established its unique blend of medicine and melodrama.
Medical Conditions in Grey's Anatomy Season 1
Season 1 of Grey's Anatomy introduces the core group of surgical interns and immediately immerses them in a variety of medical challenges. The initial episodes establish the fast-paced and demanding nature of surgical training while showcasing a diverse range of patient cases.
Episode 1
The main diagnosis being investigated is that of Katie Bryce, a 15-year-old female who presents with new onset seizures. Initially, her condition is unclear, leading to a broad workup to determine the cause of her intermittent seizures. The differential diagnoses considered are broad as her initial labs come back clear. Ultimately, through the persistence of Meredith and Cristina, and a crucial detail about a minor fall during pageant practice, they suspect and eventually confirm an aneurysm leading to a subarachnoid hemorrhage. This diagnosis becomes the central focus requiring intervention.
Diagnoses and medical concerns discussed in the episode 1:
New onset seizures were the initial presentation for Katie Bryce.
A potential diagnosis for Katie Bryce's seizures was an aneurysm.
The confirmed diagnosis for Katie Bryce was a subarachnoid hemorrhage.
Post-operative fever was present in a patient in room 4-B.
An initial assumed diagnosis for the fever in room 4-B was pneumonia.
Pulmonary embolus was another considered diagnosis for the fever and shortness of breath in room 4-B.
Mr. Savitch was scheduled for bypass surgery for his heart condition . It was later revealed his heart had too much damage for the bypass
Episode 2
There are two significant medical situations that receive considerable attention:
The case of Allison, the rape victim, who sustained severe blunt head trauma and was found to have bitten off part of her attacker's penis. While her specific diagnoses related to the trauma are mentioned (blunt head trauma, unequal breath sounds, dilated pupil) , the focus extends beyond her immediate medical state to the unusual circumstances of her case and the severed penis. The management of the penis as evidence also becomes a recurring element .
The diagnosis of Tetralogy of Fallot with pulmonary atresia in a newborn baby is also a significant storyline. An intern, Meredith, notices a murmur and a tet spell, leading to a disagreement with the on-call pediatrician. This culminates in Dr. Burke taking over the case and confirming the diagnosis, scheduling the baby for surgery.
Diagnoses and medical concerns discussed in the episode
Multinucleate cell angiohistiocytoma .
A baby presented with a murmur and a tet spell . The final diagnosis was Tetralogy of Fallot with pulmonary atresia, a birth defect .
Rapidly progressing glomerulonephritis, which could signal an autoimmune disease, was a concern based on BUN creatinine elevations.
A patient had a mixed anaerobic streptococci infection .
A patient mentioned a potential tumor as a cause for a headache, which was later determined to be benign.
Episode 3
The main diagnosis discussed in this episode appears to be brain death.
A significant portion of the narrative revolves around the unidentified John Doe who is brought to the hospital with a severe head injury. His neurological status is critical, with a GCS of 3 and fixed, dilated pupils. The medical team conducts tests over a set number of hours to determine if he meets the criteria for brain death. The six-hour mark is specifically mentioned as a timeframe for these confirmatory tests. The possibility of declaring him brain-dead raises ethical and practical considerations, such as the potential for organ donation, and elicits different reactions from the medical staff. There is a conflict when one of the residents, Izzie, attempts to prevent the declaration of brain death and tries to intervene medically, even though he is considered legally dead. Even after surgery is performed on the John Doe to repair a traumatic aortic injury, his brain-dead status is repeatedly emphasized.
Diagnoses and medical concerns discussed in the episode
Traumatic aortic injury: A radiologist observed this in the John Doe pedestrian . This is described as something that will cause him to rupture and bleed out .
Widened mediastinum and cerebral edema: These were findings from the chest and head CT scans of the unidentified John Doe .
Brain-dead: The John Doe is determined to be brain-dead after a series of tests reveal no higher-brain function . The criteria for declaring him brain-dead involve a lack of response in six hours .
Liver cancer: Lloyd Mackie, a patient in room 4451, has liver cancer and is at the top of the donor list for a new liver .
GCS 3 (Glasgow Coma Scale score of 3) and pupils fixed and dilated: These are neurological findings for the unidentified John Doe, indicating a severe state of unconsciousness and lack of brainstem reflexes .
Organ failure (implied): The discussion of organ donation for the brain-dead John Doe implies potential organ failure in recipients who could benefit from transplants .
Trauma (general): The hospital staff anticipates a surge of patients due to the Dead Baby Bike Race, suggesting various traumatic injuries.
Episode 4
There isn't a single "main diagnose" but rather several significant medical diagnoses that drive the different storylines in the episode. Here are the key diagnoses presented:
Elizabeth Fallon is diagnosed with adenocarcinoma of the pancreas. Her case and the potential for a Whipple procedure are a significant focus.
Mr. Humphrey is diagnosed with prostate cancer . His upcoming prostatectomy and concerns about its impact on his sex life are a central plot point .
Jorge Cruz presents with severe head trauma after shooting seven nails into his skull . Further investigation reveals a tumor midline near the hypothalamus . Both the trauma and the tumor are major medical issues in his storyline .
Ellis Grey, Meredith's mother, has early onset Alzheimer's . While she is not a current patient in the hospital in this episode, her diagnosis and Meredith's interactions related to it form a part of the narrative .
Each of these diagnoses receives substantial attention within the provided excerpts and could be considered a "main" diagnosis depending on the focus of the viewer.
Episode 5
The medical storyline that appears most central and drives significant plot points revolves around the complications following Mrs. Patterson's heart surgery.
Here's why this seems to be the most prominent medical focus:
It involves a high-stakes procedure: Heart surgery is inherently serious.
It leads to a critical post-operative complication: Mrs. Patterson experiences swelling and bleeding after her Coronary Artery Bypass Grafting.
It raises questions of medical error and responsibility: Dr. Grey suspects she may have nicked the heart during the initial surgery, leading to a potential investigation.
It ties into the overarching theme of responsibility: The episode frequently reflects on the weight of responsibility in adulthood and particularly in the medical profession, and Mrs. Patterson's case directly exemplifies the serious consequences of potential errors.
While other cases like Mrs. Drake's lung issues and Mr. Frost's opioid addiction and subsequent head injury are significant storylines, the developing crisis around Mrs. Patterson's heart surgery and the investigation that follows seems to be the most prominent medical arc that interweaves with the episode's core themes. The potential link between her rapid weight loss and weakened heart muscle further adds a layer of diagnostic complexity to this central case.
Diagnoses and medical concerns discussed in the episode
Here is a list of the diagnoses discussed in the episode:
Mrs. Drake has hyperinflated lungs, cloudy with bullae, and seriously diminished capacity, necessitating a bullectomy. Her condition is linked to a history of smoking .
Mr. Sterman suffers from chronic back pain . He also presents with exaggerated pain descriptions and self-prescription, leading to the suspicion of being a dilaudid junkie .
Mr. Frost has a history of bowel obstruction and is identified as a major addict or dilaudid junkie . He experiences a fall resulting in a concussion and a subdural bleed with midline shift, as well as a blown left pupil .
Mrs. Patterson is discussed as potentially having thin ventricular walls, possibly related to significant weight loss making her technically anorexic, which could contribute to a tear in her heart wall during surgery .
Episode 6
The main diagnosis discussed in this episode is the case of Ms. Annie Connors, who presented with a very large tumor of unknown origin. Ms. Annie Connors' tumor is located pressed against her diaphragm. Specifically, it is so large that the right hemidiaphragm is displaced, completely displacing her lung tissue . Furthermore, the tumor has infiltrated her spinal canal in three places . The tumor's size and location are causing her progressive shortness of breath and were crushing her lungs .
The emotional and personal aspects of her case, including her fear of hospitals and the impact of the tumor on her life, are highlighted through her interactions with the doctors. The eventual outcome of her surgery serves as a central dramatic element in the episode.
Diagnoses and medical concerns discussed in the episode
Here is a list of the diagnoses discussed in this episode of Grey's Anatomy:
Mr. Edward Levangie is admitted for pain management for dyskinesia. His underlying condition is Parkinson's disease, which is also discussed in relation to possible treatments like deep brain stimulation.
Ms. Annie Connors has a very large tumor of unknown origin pressed against her diaphragm and infiltrating her spinal canal.
Mr. Harper had a coronary bypass. There was a suspicion of myocardial ischemia, but it was determined he had a clot, leading to cardiac tamponade.
Episode 7
It appears there isn't one single "main" diagnosis that overshadows all others in this episode. Instead, several significant and complex medical cases are discussed, each driving different storylines. However, if we were to identify the most central or dramatic medical case based on the level of attention and the complexity of the intervention, Jamie Hayes's case of Rasmussen's encephalitis, requiring a hemispherectomy, stands out.
Her case is presented with a clear progression, from the initial discovery of a "brain abnormality" to the specific diagnosis of Rasmussen's encephalitis.
The diagnosis is rare and severe, with the potential to be fatal if untreated.
The treatment involves a radical surgical procedure, a hemispherectomy (removal of half of her brain), which is discussed in detail and generates significant reaction among the interns.
The outcome of her surgery is a point of discussion and anticipation .
Diagnoses and medical concerns discussed in the episode
Here is a list of the diagnoses discussed in this episode:
Brain abnormality was initially found on a CT scan for Jamie Hayes . She exhibited continuous seizure activity in her left foot and had off-balance . She was experiencing focal, left-side seizures due to the Rasmussen's encephalitis . This was later revealed to be Rasmussen's encephalitis .
Claire Rice presented with fever and abdominal pain and also had peritoneal signs . It was discovered she had undergone a gastric bypass procedure in Mexico . Complications from this included an abscess under her diaphragm and edema (swelling) of the bowel wall . She ultimately developed short gut syndrome due to the removal of a significant portion of her bowel during the reversal surgery .
Digby Owens, who intentionally got shot, developed a hemopneumothorax, which is blood in his collapsed lung caused by a fractured rib . He also developed a severe infection likely stemming from a new tattoo, which was exacerbated by the stress of the gunshot wound . He ultimately died from multisymptom organ failure, secondary to overwhelming sepsis .
Several characters mentioned having the flu, which was going around the hospital.
Episode 8
Based on the amount of discussion and development within the excerpts, we can identify several key diagnoses that appear to be central to different storylines:
The case of Devo (Esther) involves Von Willebrand's disease which explains her excessive bleeding after a root canal . This leads to the necessity of a heart valve replacement , with considerations for different types of valves (porcine vs. bovine) due to her condition and religious beliefs . This diagnostic and treatment dilemma forms a significant part of the narrative.
The story of Mrs. Glass focuses on her diagnosis of advanced stage invasive carcinoma (breast cancer) while being pregnant . The central conflict revolves around the difficult decision she has to make regarding her treatment and the fate of her baby .
The rapidly progressing paralysis of Mr. Walker presents a diagnostic mystery . While initially the MRI is clear , there is a strong suspicion of a spinal hematoma that requires an emergency surgical intervention based on clinical intuition .
The "psychic" patient, Mr. Duff, is revealed to be experiencing epilepsy and having seizures due to an AVM (arteriovenous malformation) on his left temporal lobe. The process of diagnosing his condition and planning for its treatment (surgical removal of the AVM) is another significant storyline .
Therefore, rather than a single main diagnosis, the episode appears to feature multiple significant medical cases with their own primary diagnoses that drive the narrative forward. These include Von Willebrand's disease requiring a heart valve replacement, advanced stage invasive carcinoma in a pregnant patient, a case of rapidly progressing paralysis potentially due to a spinal hematoma, and epilepsy/seizures caused by an AVM.
Episode 9
Several significant medical issues are explored as central plot points.
Syphilis: The diagnosis of syphilis in George O'Malley is a major storyline. It leads to awkward conversations, the revelation of his sexual activity, and the spread of gossip throughout the hospital. The consequences of this diagnosis, including the need to inform his sexual partner and the reactions of his colleagues, are a significant focus.
Hemachromatosis: The case of Mr. Franklin, who initially presents with symptoms of liver disease and ascites, ultimately reveals the underlying diagnosis of hemachromatosis after an unauthorized autopsy. This case involves the interns performing a risky procedure and uncovering a genetic condition that has implications for Mr. Franklin's family.
Tumor: Chief Webber's concern about his visual acuity leads to the discovery of a tumor pressing on his optic nerve. This creates a personal crisis for the Chief and involves a secret surgery planned for him.
While George's syphilis diagnosis is a comedic and socially focused storyline, and Chief Webber's tumor is a personal and professional secret, the case of Mr. Franklin and the eventual diagnosis of hemachromatosis drives a significant portion of the dramatic events in this episode, including the ethical dilemma of the unauthorized autopsy and the revelation of a potentially life-threatening genetic condition for his family. Therefore, while syphilis is a prominent storyline, the unfolding events surrounding Mr. Franklin's case and the discovery of hemachromatosis could be argued as a central diagnostic focus that ties together several key plot threads.
Diagnoses and medical concerns discussed in the episode
Here is a list of the diagnoses discussed in this episode:
George O'Malley was diagnosed with syphilis.
A patient presented with abdominal pain and blood in his urine, leading the urologist to suggest a cystoscopy to look inside the bladder. The text later reveals a mass in his bladder that is initially undetermined but later identified as an ovary due to gonadal hermaphroditism, a rare condition resulting from the merging of two embryos in the womb. The underlying cause for the need to investigate was not explicitly stated as a diagnosis initially, but the presence of blood in urine and abdominal pain were presenting symptoms.
Mr. Franklin was found to have ascites, which means there is fluid in the peritoneal cavity (abdomen). This was identified as a symptom of liver disease. He also presented with dullness to percussion and spider angiomas, which are signs pointing towards liver issues. Ultimately, it was discovered after an unauthorized autopsy that Mr. Franklin had hemachromatosis, a genetic blood condition causing an excess buildup of iron, leading to heart failure. The initial cause of death was recorded as cardiopulmonary arrest complicated by liver disease.
Chief Webber mentioned that his ophthalmologist told him he's just getting older when his vision in his right eye became blurry. However, he also expressed concern about what a decline in his visual acuity could mean. Later, a tumor pressing against his optic nerve was discovered.

Conclusions
This article takes a deep dive into the fascinating medical cases presented in the very first season of Grey's Anatomy. From the intense mystery of Katie Bryce's seizures ultimately diagnosed as a subarachnoid hemorrhage in Episode 1, through challenging diagnoses like brain death, pancreatic cancer, Rasmussen's encephalitis, Von Willebrand's disease, and even syphilis impacting the interns later in the season, we've cataloged the key conditions featured episode by episode.
By exploring how these real medical diagnoses are woven into the compelling drama of Seattle Grace, this content offers a unique way to both entertain fans revisiting the show's early days and simultaneously increase awareness and conversation about these various health conditions.
Our goal is to continue this journey through the halls of Grey Sloan Memorial (and its previous iterations!). We plan to develop similar detailed reviews for upcoming seasons. To help us decide where to focus next, please comment below and share which seasons are your favorites! Your input will help prioritize which seasons we cover sooner. We hope you enjoyed these Medical Conditions in Grey's Anatomy Season 1.
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