A man who has had gout for several years comes to the clinic with a problem with his toe. On examination, the nurse notices the presence of hard, painless nodules over the great toe; one has burst open with a chalky discharge. What is this called?

A) Tophi
B) Callus
C) Bunion
D) Plantar wart

Tophi are collections of monosodium urate crystals resulting from chronic gout in and around the joint that cause extreme swelling and joint deformity. They appear as hard, painless nodules (tophi) over the metatarsophalangeal joint of the first toe and they sometimes burst with a chalky discharge. A callus is a hard, thickened area of skin that forms as a result of friction or pressure. A bunion is a bony bump that forms on the joint at the base of your big toe (metatarsophalangeal joint). A plantar wart is vascular papillomatous growth that occurs on the sole of the foot, commonly at the ball and has small dark spots and is painful. A callus is a hard, thickened area of skin that forms as a result of friction or pressure. A bunion is a bony bump that forms on the joint at the base of your big toe (metatarsophalangeal joint). A plantar wart is vascular papillomatous growth that occurs on the sole of the foot, commonly at the ball and has small dark spots and is painful.