-osis. 1  1 suffix meaning a (specified) action, process, or result: homeosis, narcosis, zygosis. 2  2 suffix meaning increase in a pathological condition: calcicosis, psittacosis, varicosis. -osis. , pl. Combining form meaning a process, condition, or state, usually abnormal or diseased; production of an abnormal substance, increase of a normal substance, or parasitic infestation.
If non-surgical treatment fails to relieve the symptoms of accessory navicular syndrome, surgery may be appropriate. Surgery may involve removing the accessory bone, reshaping the area, and repairing the posterior tibial tendon to improve its function. This extra bone is not needed for normal foot function.
A New Splint Design for the Thumb CMC Joint 1 THUMB CMC JOINT & OSTEOARTHRITIS The thumb trapeziometacarpal joint, also called the thumb carpometacarpal (CMC) or basal joint, is the most common site of upper extremity surgery due to disabling osteoarthritis.1-4 The articulation of the first metacarpal bone with one surface of the trapezium is