1. A 52-year-old woman with overall good health presented with right lower quadrant abdominal pain, vomiting and icterus for 3 weeks. Her physical examination was remarkable for only scleral icterus and mild tenderness on palpation in the right lower quadrant. She had no palpable hepatomegaly. How would you proceed. List out the DDs in this case with the relevant investigations needed to reach at the diagnosis.
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