An 18 year old male on multibacillary multidrug therapy (MBMDT) for7 months with the diagnosis of borderline tuberculoid (BT) leprosy, presented withgradually progressive and massive right ulnar nerve abscess and radial cutaneousnerve abscess. He also had mobile complete claw hand of the right side. Highresolution ultrasonography (HR USG) of the right ulnar nerve showed markedlythickened ulnar nerve with loss of normal fascicular pattern. It also showedheteroechoic collection, with central anechoic lesion suggestive of ulnar abscess,measuring about 145cc in volume. In addition to MBMDT, the patient was started ontapering oral prednisolone starting 40 mg daily. The ulnar nerve abscess wasdecompressed by percutaneous aspiration on three occasions every 3–4 weeks. SerialHR USG of nerves was carried out throughout the treatment period. No surgicalintervention was required. After 24 months of MBMDT, complete resolution of nerveabscess with improvement in right ulnar nerve motor function was noted. The patientunderwent corrective surgery for right claw hand.
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