[Medical Human Story – Episode 70] The Shadow of Death That Even AI Missed: The Final Truth of a Primary Pulmonary Artery Sarcoma Misdiagnosed as Pulmonary Embolism-4

 


 

Part IV: The Will to Survive, Born from a Machine’s Wrong Answer

 

Snow was falling outside the hospital room window. Like pure white snow that silently buries all the world’s noise and impurities, Kim Jung-ho was quietly putting his remaining time in order. The oxygen tube resting on his nose was still aiding his labored breathing, and the pressure of the tumor crushing his lungs brought sharp stabs of pain from time to time. But the true weight pressing on his heart now was not the physical disease. It was an old, heavy confession that had pierced through his entire life—a secret locked in the abyss for 38 long years.

A profound silence descended between his wife, Lee Su-jin, his son, Min-su, and his daughter, Ji-yeon, who were keeping watch by his bedside. Watching the snow outside, Jung-ho drifted back 38 years to when he was twenty-nine. Back then, he had been a pure and passionate young man, waiting for his first teaching appointment.

[Medical Insight: Psychological Stages of Cancer Patients and 'Acceptance of Death']

The Shadow of 38 Years, the Weight of Love

"It was when I was twenty-nine," Jung-ho’s voice came out raspy. He confessed that before he met his wife, Su-jin, there was a woman he had loved deeply—a woman who had ended her short life at twenty-six due to leukemia.

"I was so terrified of losing someone. Even as I loved you, I think I always kept a corner of my heart empty because I was constantly afraid I might lose you, too. I’m so sorry... for not being able to love you completely."

Su-jin sobbed. The confession was not one of betrayal. It was a poignant, painful process of finally acknowledging the weight of the sorrow her husband had carried in his heart his entire life. "No, you loved me enough," Su-jin said, clasping his rough hand. Only when standing at the absolute terminus of death do humans finally realize how much they have been loved and how much they have truly loved in return. The tears flowing from Jung-ho’s eyes were an act of penance, washing away 38 years of silence, and a sacred ritual to prepare for the coming farewell.

[Medical Insight: Surgical Treatment of Pulmonary Artery Sarcoma and Risks]

Medicine: The Discipline of Choosing Possibility

That night, the thoracic surgery conference room was another battlefield. The medical team, including Professor Seo Yoon-ah, clashed intensely over the risks of surgery versus the possibilities of survival. Even in the face of realistic warnings that the mortality rate during surgery was high, Professor Seo chose the possibility of "surgery." She stayed in the reading room, staring at the monitor displaying the 97.8% data that had led her to initially diagnose a pulmonary embolism.

A doctor is not a machine that only calculates the right answer. A doctor is someone who constantly doubts that their judgment might be wrong and seeks the cracks of truth within that doubt. That single question—"What if it isn't?"—had created the chance to put Kim Jung-ho on the operating table today. For that alone, the existence of the medical profession was justified.

Miracle or Farewell, the Threshold of the Operating Room

At 6:00 AM on the day of the surgery, the hospital hallway was wrapped in a cold silence. Before heading to the OR, Jung-ho called his wife, Su-jin, over. "If I don't make it out... please live a happy life." Su-jin burst into tears, but Jung-ho wiped them away with trembling hands. "You still have to live. We both do." It was the most desperate and noble consolation of love for those who would be left behind.

Watching the OR doors close, Professor Seo Yoon-ah finally realized: medicine is not the technology to completely erase death, but the technology to protect humanity until the very moment death arrives. Kim Jung-ho’s bed vanished into the OR. No one knew if a dazzling miracle or a heartbreaking farewell awaited on the other side. But one thing was certain: even as he crossed that threshold, Kim Jung-ho remained not just a patient, but a "human" who loved his life and comforted his family.

The red light of the operating room flickered on. All the time in the world seemed to pause before that light.

 

Epilogue: A Life Narrative Rewritten Over a Machine’s Error

 

The surgery began at 7:12 AM. It wasn't until 9:31 PM that the red light finally turned off. A grueling 14 hours and 19 minutes. It was a time of desperate struggle for dozens of medical staff—from thoracic surgery to anesthesiology and radiology—to pull a collapsing life back from the edge of the cliff. Outside the OR, the family sat as if trapped in taxidermied time. In that space, where even the cold, quiet emotions between hope and despair had been exhausted, they relied on each other’s warmth to endure for 14 hours.

[Medical Insight: Post-Cancer Surgery Management and the Meaning of Survival]

 

The Beginning of a Miracle: Being Alive Today

At 9:31 PM, the OR doors finally opened. Professor Kang Tae-hyun, looking visibly exhausted, took off his mask and walked out. "The tumor... has been completely removed." At those words, Su-jin’s legs gave out, and she sank to the floor. However, Professor Kang’s follow-up—"However, additional treatment is absolutely critical"—foreshadowed that they were still walking a tightrope between hope and despair. The tumor had already crossed the right pulmonary artery and penetrated deep into the vessel wall, threatening the adjacent lung parenchyma.

A few days later, the final pathology confirmed it as "high-grade primary pulmonary artery sarcoma." Death had not vanished entirely; it had merely retreated for a moment, dodging the blade of the scalpel. Yet, when Kim Jung-ho opened his eyes in the ICU, he smiled faintly with a raspy voice.

"I... I’m not dead yet." That simple, rough sentence filled the room with a miracle mixed with laughter and tears. The grand miracle we crave is exactly this: to be granted the time called "today." That simple, yet magnificent fact.

A month later, even amidst the agony of chemotherapy—hair falling out, wasting away from nausea—Jung-ho endured. The moment he first locked eyes with the small, warm life resembling him, newly born and looking through the glass of the newborn nursery, he broke down. "I’m so glad I stayed alive." In that instant, the terror on the operating table and the harsh pain of the anticancer drugs were all transformed into the light of a "reason to live."

[Medical Insight: Medical Decisions and the Limitations of AI]

 

The Realm Only Humans Can Understand

At an academic conference, Professor Seo Yoon-ah spoke calmly before world-renowned experts. "AI is a wonderful tool. But medicine is not complete with pattern recognition alone. Sometimes, you must be able to see the 2.2% possibility rather than the 97.8% statistic. That is the courage to doubt, and the calling of a doctor."

This presentation resonated deeply with medical AI researchers worldwide, and the algorithms were refined even further. But Seo knew. She knew there were realms that AI, no matter how much it evolved, could never learn.

One winter afternoon, watching the back of Kim Jung-ho as he walked through the hospital garden holding his grandchild, Seo realized: AI can calculate cancer survival rates and predict recurrence risks. But the fleeting joy of a man diagnosed with death holding his grandchild, the thousands of emotions contained in the eyes of a couple who have spent 38 years together, and the weight of a final comfort offered to a worried family—these cannot be converted into numbers.

Doctors exist not to read images, but to read people. They are there not just to diagnose disease, but to endure suffering together, and to protect the meaning of life beyond the technology of extending it. Snowflakes began to flutter again. Jung-ho looked up at the sky, holding his grandchild, and smiled. Even if life ends one day, the traces of love we leave for one another will never vanish. Perhaps this grand battle called medicine is, in the end, a struggle to protect the reasons we love each other, even within our finite lives.

[Philosophical Reflection: The Completion of Humanistic Medicine] AI will perfectly learn how to discover a tumor within a pulmonary artery. However, the machine cannot learn the process of a human losing the person they love. The greatest role of medicine is not merely the physical maintenance of life, but the protection of the value of loving one another even within a finite life overshadowed by death. Medicine begins in the realm of cold data, but its completion is always achieved where human warmth resides.

This is a web novel adapted from the blog “https://leesangbock.blogspot.com/2026/06/primary-pulmonary-artery-sarcoma-vs-pulmonary-embolism-imaging-ai.html”.

The end: "Episode 70-The Shadow of Death That Even AI Missed"

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