Final answer:
The client needs additional information when they state that the survivor rate is indirectly proportional to the incidence of second malignancy.
Step-by-step explanation:
The client needs additional information when they state that 'The survivor rate is indirectly proportional to the incidence of second malignancy.' This statement is incorrect because the survivor rate of non-Hodgkin's lymphoma is actually directly proportional to the incidence of second malignancy.