Table 1. Main clinical features.

Age (median)	78.7 yrs (range 48–105)
Sex (N:196)	81 Male (41,3%) /115 Female (58,7%)
Site (N:168)	Head and neck: 76 (45,2%)
	Trunk: 7 (4,2%)
	Upper extremities: 23 (13,7%)
	Lower extremities: 59 (35,2%)
	Lymph node: 3 (1,7%)
AJCC 8th edition Clinical stage(N:75)	I: 14 (18,7%)
	II: 21 (28%)
	III: 21 (28%)
	IV: 19 (25,3%)
Immunosuppression: HIV, autoimmune disease, transplant, cancer (N:97)	18 (18,5%)
Death by the tumour*: (N:64)	29 (45,3%)

* Full clinical diagnostic and follow-up information was only available in 64 cases