system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 48-year-old man is being evaluated for an acquired defect of the myeloid stem cell line with a mutation in the PIG-A gene. His diagnosis was first suspected due to anemia and recurrent pink-tinged urine. Which of the markers will be negative in the flow cytometry test for his condition?
assistant
CD55