Summary of clinical and lesion characteristics

Age/Sex	Clinical History	Treatment	Fistular Formation	Flap Surgery	Infection	Initial Site	Rebleeding	Recurrence Site	Interval between Two Events	Clinical Course
62/M	Esophageal ca, Lt supraclavicular lymphadenopathy	RTx, I & D(2)	Yes	No	Yes	Lt mid CCA	Yes	Proximal end of the stent margin	10 days	No recurrent hemorrhage on 2 months F/U
50/M	Nasopharyngeal ca	RTx(2), skull base op. w ND (Rt), PMMC flap, free flap, I & D	Yes	Unfavorable result	Yes	Rt carotid bulb	Yes	Proximal end of the stent margin	44 days	Permanent carotid arterial occlusion for recurrent bloody sputum after the second stent placement, death after 8 months
67/M	Laryngeal ca	RTx, TL w both ND several flap surgery	Yes	Favorable result	Yes, streptococcus	Lt mid CCA	No	N/A	N/A	Death 1 month later, no recurrent hemorrhage
64/M	Laryngeal ca	RTx,(2) TL w both ND	No	No	No	Rt distal CCA	Yes	Rt ECA branch	3 days	Discharge in stable condition 2 weeks later and lost F/U
69/M	Laryngeal ca	RTx, TL w both ND, PMMC	Yes	Unfavorable result	Yes	Rt distal CCA	Yes	Distal end of the stent margin	23 days	Discharge for palliative care and lost F/U
55/F	Hypopharyngeal ca	RTx, TLPE w ND(Rt)	Yes	Unfavorable result	Yes, Klebsiella	Lt distal CCA	Yes	Distal end of the stent margin	11 days	Discharge for palliative care and lost F/U
80/M	Hypopharyngeal ca	RTx(2)	No	No	No	Rt mid CCA	Yes	Lt mid CCA	40 days	Death from sepsis 10 days after the second stent placement

Note:—Ca indicates cancer; CCA, common carotid artery; ECA, external carotid artery; F/U, follow-up; I&D, incision and drainage; TLPE, total laryngopharyngoesophagectomy; Lt, left; mid, middle; N/A, not applicable; ND, neck dissection; op, operation; PMMC, pectoralis major myocutaneous; Rt, right; RTx, radiotherapy; TL, total laryngectomy.