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Patient 3: Esophago-tumor fistula. Top: Esophagram, obtained six months after starting lenvatinib for medullary thyroid cancer, demonstrates a large fistulous tract arising from the left side of the lower cervical esophageal wall and extending in the direction of the known left thyroid mass (black arrow). Bottom: CT chest scan revealed a fistula between the left side of the lower cervical esophageal wall and the left thyroid mass (white arrow).
