4 sentences

1. 我没有老年痴呆症。

   wǒ méi​yǒu lǎo​nián chī​dāi​zhèng.

   I don't have Alzheimer's.

   Source: OpenSubtitles

2. 我又没得老年痴呆。

   wǒ yòu méi dé lǎo​nián chī​dāi.

   I don't have dementia.

   Source: OpenSubtitles

3. 这种新药旨在治疗早期老年痴呆。

   zhè zhǒng xīn yào zhǐ​zài zhì​liáo zǎo​qī lǎo​nián chī​dāi.

   This new drug is intended to treat early-stage Alzheimer's disease.

   Source: Dong Chinese Dictionary

4. 他虽然患有老年痴呆症，但依然认得自己的妻子。

   tā suī​rán huàn​yǒu lǎo​nián​chī​dāi​zhèng, dàn yī​rán rèn​de zì​jǐ de qī​zi.

   Although he suffers from Alzheimer's disease, he still recognizes his wife.

   Source: Dong Chinese Dictionary