1. (Plants) any N temperate fagaceous tree of the genus Castanea, such as C. sativa (sweet or Spanish chestnut), which produce flowers in long catkins and nuts in a prickly bur. Compare horse chestnut, water chestnut, dwarf chestnut. 2. (Cookery) the edible nut of any of these trees.
Another condition that is sometimes revealed by investigation of erythema nodosum is sarcoidosis. Drugs, including oral contraceptives, appear to be the cause of particular cases of erythema nodosum. In many cases, however, no clear cause can be found.
Other symptoms may include: 1  Fever, general aching and feeling unwell (malaise) especially when the nodules first occur. 2  Joint aches or arthralgias occur in over half of those presenting with erythema nodosum, regardless of cause. 3  Conjunctivitis is less frequent.