Table 2.

Preoperative course, treatment, and outcome in reported literature, by first author and year of publication

Ref.	Preop course1	Treatment	Margin2	Outcome	FU
Fan et al[9]	2 yr	Resection	Positive	Patients FU for 4 mo	4 mo
Fitzhugh et al[10]	5 yr	Resection	Unknown	No recurrence 5 yr after resection	5 yr
Folpe et al[4]	NS	Excision	Positive	Recurrence 3 × in 5 yr	60 mo
	Unknown	Excision	Negative	No recurrence	48 mo
Gould et al[11]	1 yr	Resection	Unknown	No recurrence	24 mo
	2 yr	Incomplete resection	Positive	Recurrence 4 yr later and resected	48 mo
Hayes et al[12]	4 mo	Complete resection, each	Positive	Six relapses in 14 yr	180 mo
Jalali et al[2]	7 mo	Second resection	NS	Small recurrence within 26 mo	26 mo
Kim et al[5]	Trauma; no family history	Resection	Unknown	Unknown	Unknown
Kumar et al[6]	4 yr	Palliative resection	Positive	After 16 mo, the tumor became larger and new nodules appeared	7 mo3
Laughlin et al[7]	3 mo	Resection	Unknown	Unknown	Unknown
Lumley et al[13]	4 yr	Incomplete resection, amputation	Positive	One 1 yr later the pain continued; 42 mo later, the knee was excised	56 mo
Negri et al[14]	> 2 yr	Resection/extensive resection of cutting edge	Negative	Unknown	Unknown
Rao et al[15]	Unknown	Resection	Unknown	Recurrence 6 yr later	72 mo
Sano et al[8]	30 yr	Resection	Unknown	No recurrence	2 yr
Skelton et al[16]	1 mo	Complete resection	Negative	No recurrence	12 mo
Zhou et al[3]	20 yr	Incomplete resection	Positive	Survival with disease	15 mo

¹At initial operation (OP).

²Follow-up after initial OP.

³7 mo after second OP, symptoms improved significantly and residual tumor found.

FU: Follow-up; OP: Operation.