"Approximately 50% of patients survive for at least 5 years post-diagnosis."
Line 21:63·Only use medical adjectival hyphens where the letters at the end and start of the compound word are the same, e.g. post-transplant. In this case, don't use the hyphen: 'post-diagnosis.'.
Numbers Over10000
warning
"They are very rare with an incidence of ~0.000005% or less than 1 case per 20 million. Equal incidence in middle-aged men and women."
Line 3:47·Use a thousands separators for large numbers.