The term licked candy stick appearance refers to tapering of the tips of the metacarpal / tarsal bones, phalanges or clavicles. This finding can be seen in advanced cases of:
Psoriatic arthritis: enthesitis and marginal erosions destroy the peripery of the bone, leaving a thinned central region. This also leads to the "pencil in cup deformity".
Rheumatoid arthritis: marginal erosions and destruction of the joint, due to destructive pannus, also may leave a tapered portion of bone.
Leprosy: atrophy and resorption of bone due to deinvervation, begins distally in the colder regions of the body and progresses proximally.
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