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Figure 2b. Normal anatomy of the malleus. (a) Posterior oblique 3D VR CT image shows the head of the malleus (HM) and, appearing as a narrow constriction inferiorly, the neck of the malleus (NM). The manubrium (M) lies inferior to the neck. The head of the malleus demonstrates a facet (F) on its posterior aspect that articulates with the body of the incus. (b) Anterior oblique 3D VR CT image shows two bony spicules arising from the upper portion of the manubrium, the anterior process (AP) and the lateral process (LP). The tip of the manubrium (TM) attaches to the tympanic membrane at the umbo.
