[jt2190]

> ... defied all odds and exhibited the symptom of the disease in her 70s.

I assume you mean: "exhibited no symptoms of the disease until her 70s".

Other than luck, did they have any idea why she was able to resist the disease for so long?

[sillyfluke]

yes, thats what I meant. Supposedly the woman had another mutation in the Christchurch gene that counteracted the effects of the early onset mutation.