callus /cal·lus/ (kal´us) [L.]
Callus
callus
callus [kal´us]
1. localized hyperplasia of the stratum corneum of the epidermis due to pressure or friction.
2. an unorganized network of woven bone formed about the ends of a broken bone, which is absorbed as repair is completed (provisional c.), and ultimately replaced by true bone (definitive c.) .
cal·lus (k l  s)n. pl. cal·lus·es 1. See callosity. 2. The hard bony tissue that develops around the ends of a fractured bone during healing. |
Callus
Thickened skin due to chronic rubbing or irritation.
Mentioned in: Lichen Simplex Chronicus
callus
[kal′əs]
Etymology: L, hard skin
1 also called callosity. a common, usually painless thickening of the stratum corneum at locations of external pressure or friction. Compare corn.
2 also called keratoma. Bony deposit formed between and around the broken ends of a fractured bone during healing. callous, adj.
callus [kal´us]
1. localized hyperplasia of the horny layer of the epidermis due to pressure or friction.
2. an unorganized network of woven bone formed about the ends of a broken bone; it is absorbed as repair is completed (provisional callus), and ultimately replaced by true bone (definitive callus).
A fracture with callus formation (arrow) is demonstrated corresponding to the base of the second metatarsal. From Thrall and Ziessman, 2001.
callus (kal´
s),n the tissue near and about the broken fragments of a bone that becomes involved in the repair of the fracture through various stages of exudate, fibrosis, and new bone formation.
callus
1. localized hyperplasia of the horny layer of the epidermis due to pressure or friction. In dogs, these often form over pressure points such as the elbow, hock and (in some breeds) sternum, particularly if the animal is sleeping on a hard surface.
2. an unorganized network of woven bone formed about the ends of a broken bone; it is absorbed as repair is completed (provisional callus), and ultimately replaced by true bone (definitive callus).
bridging callus
bridging the callus gap.
external callus
around the outside of a fracture.
hard callus
fully mineralized.
hypertrophic callus
a form of delayed healing in which fibrocartilage forms between fracture fragments, resulting in a false callus. Called also elephant's foot callus.
internal callus
between the ends of fractured bones.
periosteal callus
new bone formed by the proliferation of periosteal osteogenic cells.
provisional callus
a subsequently remodeled callus.
callus pyoderma
secondary bacterial infection, particularly of pressure point calluses in dogs; can be extensive with deep pyogenic inflammation.
soft callus
the originating fibobrocellular tissue before calcification.
sternal callus
may develop over a prominent sternum in some breeds of dogs, particularly Dachshunds, in response to pressure.
temporary callus
see provisional callus (above).
callus
Callosity, tyloma Dermatology Localized hyperkeratosis of skin 2º to repeated friction or pressure Orthopedics A mass of indurated bony trabeculae and cartilage formed by osteoblasts early in healing fractures
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