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callus is a topic covered in the Taber's Medical Dictionary.

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(kal′ŭs )

[L., hardened skin]

1. A circumscribed thickening and hypertrophy of the horny layer of the skin. It may be oval or elongated, gray or brown, slightly elevated, with a smooth burnished surface. It appears on the flexor surfaces of hands and feet and is caused by friction, pressure, or other irritation.

CALLUS (on the weight-bearing portion of the foot)
SYN: SEE: callosity

Salicylic acid or careful shaving will remove the callosity temporarily. Removal is made permanent only by elimination of the cause.

2. The osseous material woven between the ends of a fractured bone that is ultimately replaced by true bone during healing.
SEE: porosis

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Venes, Donald, editor. "Callus." Taber's Medical Dictionary, 23rd ed., F.A. Davis Company, 2017. Taber's Online, www.tabers.com/tabersonline/view/Tabers-Dictionary/769102/all/callus.
Callus. In: Venes D, ed. Taber's Medical Dictionary. 23rd ed. F.A. Davis Company; 2017. https://www.tabers.com/tabersonline/view/Tabers-Dictionary/769102/all/callus. Accessed May 24, 2019.
Callus. (2017). In Venes, D. (Ed.), Taber's Medical Dictionary. Available from https://www.tabers.com/tabersonline/view/Tabers-Dictionary/769102/all/callus
Callus [Internet]. In: Venes D, editors. Taber's Medical Dictionary. F.A. Davis Company; 2017. [cited 2019 May 24]. Available from: https://www.tabers.com/tabersonline/view/Tabers-Dictionary/769102/all/callus.
* Article titles in AMA citation format should be in sentence-case
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