Table 1.

Patient characteristics.

Group		Number of Cases (%)
IP		n = 20
Sex	Male/female	16 (80)/4 (20)
Age, median (range)		57 (33–80) years
Krouse T classification	T1/T2/T3/T4	0/4/15/1
Primary tumor site	Maxillary sinus	14 (70.0)
	Ethmoid sinus	5 (25.0)
	Sphenoid sinus	1 (5.0)
Recurrence after surgery		1 (5%)
IP-SCC		n = 7
Sex	Male/female	4/3
Age, median (range)		57 (46–91) years
Primary tumor site	Maxillary sinus	4 (57.1)
	Ethmoid sinus	2 (28.6)
	Sphenoid sinus	1 (14.3)
Treatment	Surgery + CRT	2
	CRT/RT	3
	Other	2
Prognosis	Alive without disease	4
	Alive with disease	1
	Dead of disease	2
SNSCC		n = 20
Sex	Male/female	17 (93.3)/3(6.7)
Age, median (range)		59 (35–81) years
Primary tumor site	Maxillary sinus	17(85.0)
	Nasal cavity	2 (10.0)
	Ethmoid sinus	1 (5.0)
SCC subtype	Poor/moderate/well	2/11/7
Clinical T classification	T1/T2/T3/T4	0/0/7/13
Clinical N classification	N0/N1/N2/N3	12/5/3/0
UICC Stage	I/II/III/IV	0/0/6/14
Treatment	Total maxillectomy	1 (5.0)
	CRT/RT	17 (85.0)
	Other	2 (10.0)
Prognosis	Alive without disease	13 (65.0)
	Dead of disease	6 (30.0)
	Intercurrent disease death	1 (5.0)

CRT, concurrent chemoradiotherapy; IP, inverted papilloma; RT, radiation therapy; SCC, squamous cell carcinoma; SN, sinonasal; UICC, Union for International Cancer Control (7th edition).