A right-handed 14-year-old boy was referred to a neurologist for an outpatient evaluation of tremor. The boy was previously healthy and not taking any medications. Developmental milestones were achieved within the appropriate norms. There was a family history of tremor in the boy's mother and maternal uncle. The mother reported that her tremor lessened following the consumption of alcohol. The parents first noticed the tremor in their son when he was about six years old. The tremor occurred mainly during voluntary activity, such as writing, eating soup with a spoon, drinking from a cup and using his hands for small skilled movements. The tremor affected both arms and was worse on the right side. His head, voice and legs were unaffected. The tremor was worse when he was physically tired (e.g., after heavy lifting) or nervous (e.g., public speaking). Over the years, the tremor has worsened slightly and has become a source of embarrassment to him.On examination, the patient showed no distress and had normal vital signs; he was alert, behaved appropriately and had age-appropriate speech and language. Results of a cranial nerve examination were normal. A motor system examination showed normal bulk and tone. Strength in the upper and lower limbs was graded as 5 out of 5 in a manual muscle test. Results of sensory and gait examinations were normal. He was able to walk without difficulty using a tandem gait.