Outcome of Nonsurgical Management of Extra-Abdominal, Trunk, and Abdominal Wall Desmoid-Type Fibromatosis: A Population-Based Study in the Netherlands

Table 1

Baseline characteristics.

	All patients		Active Surveillance		Radiotherapy		Systemic treatment
	N	%	N	%	N	%	N	%
Gender
Male	30	33	9	24.3	12	34.3	9	47.4
Female	61	67	28	75.7	23	65.7	10	52.6
Age (years)
Median (IQR)	39 (33.1–52.2)		36 (31.2–51.6)		43.6 (39.4–52.4)		34.8 (23.3–46.3)
Localization
Head/neck	9	9.9	3	8.1	6	17.1	—	—
Thorax/back	35	38.5	13	35.1	13	37.1	9	47.4
Abdominal wall	25	27.5	17	45.9	1	2.9	7	36.8
Extremity	21	23.1	4	10.8	15	42.9	2	10.5
Others	1	1.1	—	—	—	—	1	5.3
Size
<5 cm	25	27.5	16	43.2	7	20.0	2	10.5
5–10 cm	48	52.7	18	48.6	19	54.3	11	57.9
>10 cm	15	16.5	2	5.4	8	22.9	5	26.3
Missing data	3	3.3	1	2.7	1	2.9	1	5.3
Beta-catenin (nuclear)
Positive	56	61.5	28	75.7	16	45.7	12	63.2
Negative	10	11	3	8.1	6	17.1	1	5.3
Unknown	25	27.5	6	16.2	13	37.1	6	31.6

N = number of patients; cm = centimeter; IQR = interquartile range; groin.