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CLINICAL CHALLENGE Hyperpigmented Macule on the Palm and Diminished Sensation No further treatment is indicated Perform a diagnostic biopsy of the hyperpigmented area and right ulnar nerve Prescribe a 6-month course of isoniazid, rifampin, ethambutol, and pyrazinamide Prescribe a 12-month course of dapsone combined with rifampin What would you do next?