Table 11 Summary of (chemo)radiotherapy-associated toxicities ≥ grade 3 according to CTCAE version 5.0

Acute toxicities–no. (%)

29 (33.7)

Hematological side effects – no. (%)

13 (15.1)

Dysphagia / odynophagia – no. (%)

9 (10.5)

Esophageal stenosis – no. (%)

3 (3.5)

Mucositis – no. (%)

1 (1.2)

Acute renal failure – no. (%)

1 (1.2)

Tumor bleeding – no. (%)

2 (2.3)

Fistula with consecutive pneumonia – no. (%)

1 (1.2)

Nausea / emesis – no. (%)

1 (1.2)

Lethal event

1 (1.2)

Late toxicities – no. (%)

14 (16.3)

Dysphagia – no. (%)

13 (15.1)

Esophageal stenosis – no. (%)

13 (15.1)

Fistula – no. (%)

2 (2.3)