Artificial intelligence is shaking up industries from software and law to entertainment and education. And as physicians like Dr. Cem Aksoy are learning, it¡¯s posing special challenges in medicine as patients tap the technology for advice.

Aksoy, a medical resident at a hospital in Ankara, Turkey, says an 18-year-old patient and his family recently panicked after the young man was diagnosed with a cancerous tumor on his left leg. They turned to OpenAI¡¯s ChatGPT. The bot said he might survive only five years.

It was wrong: A plastic surgeon successfully removed the tumor in July. ¡°He was essentially cured after the operation,¡± Aksoy said.