Table 1.

Characteristics of the study group

Characteristics	Values
Patients	n = 27 with 28 lesions
Age
Mean age ± std.	4.5 ± 3.2 years
Range	0.3–11.5 years
Diagnosis
Neuroblastoma	n = 18 (one bilateral resulting in 19 NB lesions)
Ganglioneuroblastoma	n = 7
Ganglioneuroma	n = 2
Tumor localizationa
Cervical	n = 1
Thoracic	n = 4a
Abdominal (extraadrenal)	n = 16a
Adrenal	n = 7b
Pelvic	n = 1
Genetic alterations
MYCN amplification	n = 6
Positive 1p-deletion	n = 4
Imbalanced 1p-status	n = 2
123I-MIBG scintigraphy findings
123I-MIBG: positive	n = 11
123I-MIBG: negative	n = 1
123I-MIBG: unclear	n = 1
Risk group stratification
High risk	n = 14
Intermediate risk	n = 7
Low risk	n = 6

^aOne case of thoracic-abdominal manifestation

^bOne bilateral manifestation

Abbreviations: ¹²³I-MIBG ¹²³Iodine-meta-iodobenzylguanidine