Fig. 1From: Case report series: revisiting third and fourth pharyngeal arch anomalies, − are they thymopharyngeal duct remnants?Barium swallow with rapid sequencing images showing a 4 cm. blind-ended sinus from the apex of the left piriform fossa extending inferiorly in relation to the deep aspect of the lobe of the thyroid. Additional imaging was undertaken with ultrasoundBack to article page