Table 3.

Tumor characteristics of head and neck SCC recurrences before diagnosis and treatment of PDT tumor in 26 patients.

Recurrences before PDT tumor
	First recurrence (n = 9)	Second recurrence (n = 1)
Origin of recurrence	n (%)	n (%)
First primary	8 (30.8)	1 (3.8)
Second primary	1 (3.8)
No recurrence	17 (65.4)	25 (96.2)
Location	n (%)	n (%)
Oral cavity (OC)	6 (23.1)	1 (3.8)
Oropharynx	1 (3.8)	1 (3.8)
OC + oropharynx	1 (3.8)
Larynx	1 (3.8)
No recurrence	17 (65.4)	24 (92.3)
TNM classification	n (%)	n (%)
Clinical T class
cT4a	1 (3.8)
Clinical N class
cN0	4	1 (3.8)
Pathological T class
pT1	2 (7.7)	1 (3.8)
pT2	1 (3.8)
pT3	1 (3.8)
pT4a	1 (3.8)
Pathological N class
pN0	2 (7.7)
not available	3 (11.5)	0
Treatment	n (%)	n (%)
Ablative surgery alone	3 (11.5)	1 (3.8)
AS + ND	4 (15.4)
AS + adj. RT	1 (3.8)
Primary RT	1 (3.8)

OC, Oral Cavity; AS, Ablative surgery; ND, selective neck dissection; adj. RT, adjuvant radiotherapy; RT, radiotherapy.