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We report , in two A - T families , an ATM mutation ( 7271T - - > G ) that may be associated with an increased risk of breast cancer in both homozygotes and heterozygotes ( relative risk 12 . 7 ; P = . 0025 ) , although there is a less severe A - T phenotype in terms of the degree of cerebellar degeneration .
 Disease: A - T; Disease: breast cancer; Disease: A - T; Disease: cerebellar degeneration
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: A - T; Disease: breast cancer; Disease: A - T; Disease: cerebellar degeneration