An Endoscopic Endonasal Approach for Early-Stage Olfactory Neuroblastoma: An Evaluation of 2 Cases with Minireview of Literature

Table 1

A sequential resection with negative margins via endoscopic endonasal approach versus open en bloc resection.

	Number of cases (stages)	Resection	Period of observation (m)	Recurrence	Prognosis (%)
Unger et al. (2005) [11]	14 (B5, C9)	Piecemeal 2/en bloc 12	13–128 (58.0)	3/14	100
Castelnuovo et al. (2007) [12]	10 (A3, B4, C3)	Piecemeal	15–79 (37.0)	0/10	100
Suriano et al. (2007) [13]	9 (A3, B6)	Piecemeal/en bloc	26–60 (42.8)	0/9	100
Dave et al. (2007) [14]	9 (A5, B2, C2)	Piecemeal 3/en bloc 6	4–105 (36.7)	0/9	100
Zafereo et al. (2008) [15]	3 (A2, B1)	Piecemeal/en bloc	21–147 (67.3)	1/3	100
Folbe et al. (2009) [16]	17 (A2, B11, C4)	Piecemeal/en bloc	11–152 (45.2)	0/17	100