PTEN and neoplasm: In our results, CNNLOH was observed across tumour types with particular recurrence in regions of known key tumour suppressor genes such as PTEN and TP53. The multiform nature of data derived from the OncoScan® assay adds considerable value to these samples with regions of CNNLOH frequently observed as co-occurring with SMs in both oncogenes and tumour suppressor genes across tumour types.