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A calcaneal spur (also known as a heel spur) is a bony outgrowth from the calcaneal tuberosity (heel bone). [1] Calcaneal spurs are typically detected by x-ray examination. [2] It is a form of exostosis. When a foot is exposed to constant stress, calcium deposits build up on the bottom of the heel bone. Generally, this has no effect on a person ...
An enthesophyte, consisting of calcification deposits within the Achilles tendon at its calcaneal insertion. The Achilles tendon is wider than normal, further suggesting inflammation . Enthesophytes are abnormal bony projections at the attachment of a tendon or ligament . [ 1 ]
An incidental finding associated with this condition is a heel spur, a small bony calcification on the calcaneus (heel bone), which can be found in up to 50% of those with plantar fasciitis. [6] In such cases, it is the underlying plantar fasciitis that produces the heel pain, and not the spur itself. [13]
A picture illustrating the location of the calcar on a bat. The calcar, also known as the calcaneum, [1] is the name given to a spur of cartilage arising from inner side of ankle and running along part of outer interfemoral membrane in bats, [1] [2] as well as to a similar spur on the legs of some arthropods.
Exostoses are sometimes shaped like spurs, such as calcaneal spurs. Osteomyelitis, a bone infection, may leave the adjacent bone with exostosis formation. Charcot foot, the neuropathic breakdown of the feet seen primarily in diabetics, can also leave bone spurs that may then become symptomatic.
Enthesopathy of the pelvis likely due to ankylosing spondylitis. Enthesopathy can occur at the shoulder, elbow, wrist, carpus, hip, knee, ankle, tarsus, or heel bone, among other regions.
The calcaneus spur found on the male platypus' hind limb is used to deliver venom. Spurs are uncommon in mammals. The male platypus has well developed spurs on the heels of its hind feet. The spurs are hollow and connected to a venom gland, allowing the platypus to deliver a very painful kick both in mating competitions and as a defense. [22]
Enthesitis is inflammation of the entheses (singular: enthesis), the sites where tendons, ligaments and joint capsules attach to bones. [1] [2]It is a type of enthesopathy, meaning any pathologic condition of the entheses, with or without inflammation.