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The evidence of a significant proportion of loss - of - function mutations and a complete absence of the normal copy of ATM in the majority of mutated tumours establishes somatic inactivation of this gene in the pathogenesis of sporadic T - PLL and suggests that ATM acts as a tumour suppressor .
 Disease: tumours; Disease: sporadic T - PLL; Disease: tumour
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease 
Text: {0} 
Answer:
 Disease: tumours; Disease: sporadic T - PLL; Disease: tumour