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Table 2 Characteristics of the second tumor(n = 19)

From: Radiation-induced cancer after radiotherapy for non-Hodgkin's lymphoma of the head and neck: a retrospective study

Type of second tumor n O/Eratio 95%CI AER*
Synchronous 3    
   Esophagus 1    
   Stomach 1    
   Cervix 1    
Metachronous 16 0.8 0.47–1.33 -14.6
   Head and neck     
In irradiated field 4 12.7 4.07–35.0 13.3
Out of irradiated field 1    
   Esophagus 2 3.24 0.56–13.1 4.95
   Stomach 2 0.39 0.07–1.55 -11.4
   Colon 3 1.55 0.40–4.93 3.80
   Breast 1    
   Gallbladder 1    
   Soft-tissue sarcoma(buttocks) 1    
   Myeloma(thoracic vertebra) 1    
  1. * Absolute excess risk per 10,000 person-years