“…2 Although geniospasm is hereditary with an autosomal dominant inheritance pattern, no causative gene has yet to be identified. 1 Within these cases of geniospasm, 9-12% also have associated RNTB 1,2 which range from mild, with small lacerations of the tongue, to severe, as in this case, with amputation of a portion of the tongue with loss of speech, weight loss, sleep fragmentation, and persistent irritability. 1,[3][4][5][6] Onset of RNTB in geniospasm often occurs between 9 and 18 months of age and decreases during early childhood.…”