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Table 2 Characteristics of 57 matched controls

From: Radiotherapy and subsequent thyroid cancer in German childhood cancer survivors: a nested case–control study

ICCC group First cancer type Controls n RT+ n Median age at diagnosis of FN (range)
I Leukaemias 22 18 5 (1–14)
II Lymphomas 12 7 9 (1–14)
III CNS tumours 6 3 5.5 (4–13)
IV Neuroblastoma 1 0 1 (−)
VI Renal tumours 9 3 1 (1–12)
VII Hepatic tumours 1 0 0 (−)
VIII Bone tumours 1 1 3 (−)
IX Soft tissue sarcomas 2 1 4.5 (4–5)
X Germ cell tumours 2 0 1 (0–2)
  Other non-malignant neoplasm 1 1 14 (−)
Total All FNs 57 34 5 (0–14)
  1. CNS: central nervous system
  2. FN: first neoplasm
  3. ICCC: International Classification of Childhood Cancer
  4. RT+: radiotherapy received
  5. Characteristics of 57 matched controls by FN (ICCC-3 classification [1]) diagnosed in 1980–2000 in Germany, aged under 15 years