has part has part has_part characteristic of abnormal tubotympanic recess morphology absent tubotympanic recess 2017-10-03T10:34:40Z absence of the elongate recess derived from the first pharyngeal pouch; its distal part contributes to the formation of the tympanic membrane, its proximal part elongates to form the auditory tube, and its cavity gives rise to the tympanic cavity and mastoid antrum MPheno.ontology MP:0030228 middle ear