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
Patient presenting with marked loin pain, tenderness and pyrexia shows nonspecific findings on IVP but on US reveals a heterogeneous mass with posterior acoustic enhancement and central necrosis and internal debris. CT shows marginal enhancement with air densities within. The likely diagnosis is:
assistant
The correct answer is  Renal abscess Presence of air, rim enhancement on CT and posterio acoustic enhancement in a focal mass with acute clinical history is suggestive of an abscess.