Nodular masses have developed in the periaicular tissue of the proximal and distal interphalangeal joints of the right hand of a 58-year-old man with a 10-year-history of gout. Which of the following choices best describes the characteristics of these masses?
Pathognomonic lesion of chronic gout Histologically similar to a rheumatoid nodule Contains weekly positives birefringent monosodium urate crystals Associated with fibrinoid necrosis