Inclusion Criteria:  Age between 1 day and 15 years 365 days Have a diagnosis of an intra-abdominal, retroperitoneal or intra-thoracic tumour or pulmonary metastases Require surgery as part of their treatment Tumour or metastasis suitable for MIS resection based on assessment of the pre-operative imaging  Exclusion Criteria:  Allergic to ICG Allergic to iodine or iodides Due to receive radioactive iodine as part of a treatment Hyperthyroidism Unwilling to participate Chronic Kidney Disease stage V