TTR and laryngotracheoesophageal cleft: The results obtained through the interpretation of 99mTc-DPD scintigraphy showed that the diagnosis of CA (TTR-CA or LC-CA) is not always clear from the beginning (inconclusive or equivocal studies), despite the advances obtained in the interpretation methods, and continue to suffer the subjectivity of the semiquantitative approach and the lack of a standardized cut-off point for the images acquired 3 h after the administration of 99mTc-DPD in the quantitative method.