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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.
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Linear filling defect on ERCP is characteristic of which of the following :
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The correct answer is  Linear filling defect in main CBD is a characteristic feature of BILIARY ASCARIASIS. ERCP is the gold standard but an invasive method. It is used also in the extraction of CBD worms. The worms appear as a hypointense structure within the hyperintense CBD giving linear filling defect on MRCP/ERCP