A 40-year-old man has come into the clinic reporting extreme pain in his toes. The nurse notices that his toes are slightly swollen, reddened, and warm to the touch. What does the nurse suspect?

A) Acute gout
B) Osteoporosis
C) Ankylosing spondylitis
D) Degenerative joint disease

Clinical findings for acute gout consist of redness, swelling, heat, and extreme pain like a continuous throbbing. Gout is a metabolic disorder of disturbed purine metabolism, associated with elevated serum uric acid. Osteoporosis is a decrease in skeletal bone mass leading to low bone mineral density and impaired bone density which increases the risk for fractures. It occurs primarily in postmenopausal white women. Ankylosing spondylitis is chronic inflamed vertebrae and is characterized by inflammatory back pain that is dull and deep in lower back or buttocks. Degenerative joint disease (osteoarthritis) is a localized, progressive disorder involving deterioration of articular cartilages and subchondral bone remodeling, synovial inflammation, and formation of new bone at joint surfaces. Asymmetric joint involvement commonly affects hands, knees, hips, and lumbar and cervical segments of the spine. This patient's symptoms are consistent with acute gout.