(1) the exposed surface will quickly form healing callus(2) When a patch of bark is removed from a tree the wound is healed by the formation of a callus which differentiates into periderm.(3) In these areas, the skin often thickens into a callus , which when excessive can lead to an ulcer.(4) Furthermore, it was also observed that the callus formed from the radicle grew faster than the callus of plumule origin, thus reducing the formation of embryogenic callus .(5) Two cases were consistent with fracture callus based on the history of fall and injury to the spine and based on review of the concurrent cell block, which helped in making a definitive diagnosis.(6) he had a callus on his hand(7) The present paper describes the formation of surface callus on stem wounds of lime trees as observed by light and electron microscopy.(8) In the course of time, the callus is smoothed off and eventually the bone returns to its normal thickness.(9) It normally takes one to two weeks for a callus to form, then about six weeks for the bone fragments to unite.(10) she had a callus on her foot(11) The footwell was perpetually swamped now, my forearms were pumped from choking the oars in a death grip, and dime-size blisters had begun to well up under the calluses on my palms.(12) His hands are soft and have only mild calluses from playing guitar.(13) His hair was greasy and stringy, and his skin had developed brown callouses .(14) It is all there, like the scars and calluses on a farmer's hands.(15) His hands were thin, with long fingers unmarked by callouses , and his skin was too white to have been too often outside.(16) Observing the affected knee may reveal dystrophic changes, alteration of skin color, calluses related to kneeling or occupational abuse of the knee, scars, scratches, or rashes.