Q. Local sheriff’s officers bring a 27-year-old man to the emergency department after he was reported unsteadily walking around a busy intersection. Witnesses state he had been doing so for at least three hours. As he seemed disoriented and showed no signs of alcohol, law enforcement brought him to the ED. The patient is unable to provide his medical history. His vital signs are within normal limits. On physical examination his liver edge is palpable 6cm below the costal margin, and truncal spider naevi are noted. Ophthalmologic examination reveals dark golden-brown rings around his iris. His abdomen is soft and non-tender. Which of the following is the most likely diagnosis?