Table 1. Clinical characteristics of enrolled patients (n=24)

No	Sex	Age	Diagnosis	Defect	Flap	Outcome	Re-operation
1	M	59	SMG ca.	Extraoral	LD	No loss	No
2	M	59	Nasal cavity ca.	Extraoral	ALT	Partial loss	No
3	F	56	Supraglottic ca.	Extraoral	DP	Total loss	PMMC
4	M	56	Glottic ca.	Extraoral	PMMC	No loss	No
5	M	58	Maxillary sinus ca.	Extraoral	Forehead	No loss	No
6	M	41	Hard palate ca.	Extraoral	LD	No loss	No
7	M	82	Eye lid ca.	Extraoral	Forehead	No loss	No
8	M	78	Hypopharynx ca.	Extraoral	PMMC	No loss	No
9	M	40	Tongue ca.	Intraoral	FAMM	Partial loss	No
10	M	57	Tongue ca.	Intraoral	FAMM	No loss	No
11	M	62	FOM ca.	Intraoral	FAMM	No loss	No
12	M	56	Buccal ca.	Intraoral	ALT	No loss	No
13	M	31	RMT ca.	Intraoral	ALT	Partial loss	Re-anastomosis
14	M	69	Buccal ca.	Intraoral	ALT	Partial loss	Re-anastomosis
15	M	65	Tongue ca.	Intraoral	ALT	Partial loss	No
16	F	68	Tongue base ca.	Intraoral	FAMM	No loss	No
17	F	67	FOM ca.	Intraoral	FFF	Partial loss	No
18	M	70	RMT ca.	Intraoral	RFF	No loss	No
19	F	62	Tongue ca.	Intraoral	FAMM	No loss	No
20	F	41	Maxillary sinus ca.	Intraoral	ALT	Total loss	ALT
21	F	74	Tongue ca.	Intraoral	FAMM	No loss	No
22	M	46	Tongue ca.	Intraoral	ALT	Partial loss	No
23	F	56	Tongue ca.	Intraoral	LD	No loss	No
24	M	36	Tongue ca.	Intraoral	ALT	Partial loss	No

ca.: cancer, SMG: submandibular gland, FOM: floor of mouth, RMT: retromolar trigone, CCRT: chemoradiation, LD: latissimus dorsi myocutaneous, ALT: anterolateral thigh, DP: deltopectoral, PMMC: pectoralis major myocutaneous, FAMM: facial artery musculomucosal, FFF: fibula free flap, Re-anastomosis: flap vein thrombosis removal and reanatomosis