3 sentences

1. 医生诊断他患有急性肾炎。

   yī​shēng zhěn​duàn tā huàn​yǒu jí​xìng shèn​yán.

   The doctor diagnosed him with acute nephritis.

   Source: Dong Chinese Dictionary

2. 他因为急性肺炎住进了医院。

   tā yīn​wèi jí​xìng fèi​yán zhù jìn le yī​yuàn.

   He was hospitalized with acute pneumonia.

   Source: Dong Chinese Dictionary

3. 他因为患上急性肺炎，昨晚已经在医生的建议下住院了。

   tā yīn​wèi huàn​shang jí​xìng fèi​yán, zuó​wǎn yǐ​jīng zài yī​shēng de jiàn​yì xià zhù​yuàn le.

   He was hospitalized last night on the doctor's advice because he contracted acute pneumonia.

   Source: Dong Chinese Dictionary