Table 1. Patient characteristics.

Characteristic	Value
Sex
Male/Female, No.	11/11
Median age, years (range)	25 (9–60)
Follow-up period (alive patients), months (range)	36 (16–112)
Primary tumor site, No.
Paranasal sinus	8
Nasal cavity	7
Orbita	2
Temporal fossa	2
Nasopharynx	1
Oral cavity	1
Parapharyngeal space	1
Histopathological type, No.
Rhabdomyosarcoma (Embryonal/Alveolar/Solid/Pleomorphic)	15 (2/8/2/3)
Ewing's sarcoma	3
Chondrosarcoma Grade2	1
Undifferentiated/unclassified sarcoma	3
Pattern of skill base invasion, No.
Dura invasion	5
Cranial fossa invasion	3
Canopy of ethmoid sinus invasion	8
Orbital superior wall invasion	2
Infratemporal fossa invasion	4
Pathological neck metastasis, No.
Positive/Negative	2/20
Distant metastasis, No.
Positive/Negative	0/22
Induction chemotherapy, No.
Positive/Negative	18/4
Free flap reconstruction, No.
Positive/Negative	5/17
Postoperative radiotherapy, No.
Positive/Negative	16/6

Abbreviation: No., Number of patients.