Serendipitous Manifestation of Intra-abdominal Mass Leading to Primary Gout Diagnosis: A Case Report.

Gout is characterized by the deposition of monosodium urate (MSU) crystals with negative birefringence under polarized light in synovial fluid and joint regions. This results in the development of chronic inflammatory arthritis, typically in the first metatarsophalangeal, talar, subtalar, ankle, and knee joints. Although less common, an underrecognized feature of gout is extraarticular deposition, such as in the abdomen. This case report describes the presence of a gouty abdominal mass in a 66-year-old male with no prior history of gout. We exhibit our imaging findings and discuss the importance of keeping gout in the differential when an unknown abdominal mass is found.