abnormal malleus morphology abnormal malleus manubrium morphology MP:0008374 MPheno.ontology abnormal handle of malleus morphology abnormal malleal manubrium morphology abnormal malleus handle morphology abnormal manubrium mallei morphology abnormal manubrium morphology abnormal manubrium of malleus morphology any structural anomaly in the handle of the malleus, which extends downward, inward, and backward from the neck of the malleus and is embedded throughout its length in the tympanic membrane