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15 kwi 2024 · Os scaphoideum accessorium An accessory navicular is a large accessory ossicle that can be present adjacent to the medial side of the navicular bone. The tibialis posterior tendon often inserts with a broad attachment into the ossicle.
Os tibiale externum (accessory navicular) is a large ossicle adjacent to the medial side of the navicular bone. The tibialis posterior tendon often inserts with a broad attachment onto the ossicle, which may cause a painful tendinosis due traction between the ossicle and the navicular. Such changes are best seen on MRI.
21 paź 2023 · The accessory navicular syndrome, also known as os naviculare syndrome occurs when a type II accessory navicular becomes painful due to movement across the pseudo-joint between the ossicle and the navicular bone.
13 sie 2024 · The accessory navicular bone, also known as the os tibiale externum or os naviculare secundarium, is an anatomic variant that can be encountered on the medial side of the foot and ankle.
A type I is a 2-3 mm sized sesamoid bone in the posterior tibial tendon refered as “os tibiale externum” and account for 30% of all accessory navicular bones (figures 1, 2 and 3). Type II is a 9-12 mm triangular or heart-shapped bone connected to... Read more. Imaging findings OR Procedure details.
4 paź 2007 · Accessory navicular (os tibiale externum, os naviculare secundarium) There are 3 types of accessory navicular. 12,13 Type I, or os tibiale externum, occurs when an ossification center forms a sesamoid bone within the tibialis posterior tendon, near the navicular insertion.
Axial contrast-enhanced fat-suppressed MR image (TR/TE, 600/8) reveals excessive contrast enhancement around posterior tibialis tendon (arrow) in region of medial malleolus, consistent with synovitis. Enhancement is also seen in posterior tibialis tendon and is consistent with component of interstitial tear.
