4 sentences

1. 该病变位于股骨远端。

   gāi bìng​biàn wèi​yú gǔ​gǔ yuǎn​duān.

   The lesion is located at the distal end of the femur.

   Source: Dong Chinese Dictionary

2. 医生用X射线照射病变部位。

   yī​shēng yòng X​shè​xiàn zhào​shè bìng​biàn bù​wèi.

   The doctor irradiated the affected area with X-rays.

   Source: Dong Chinese Dictionary

3. 医生通过影像检查发现了肝脏上的几处病变。

   yī​shēng tōng​guò yǐng​xiàng jiǎn​chá fā​xiàn le gān​zàng shàng de jǐ chù bìng​biàn.

   The doctor found several lesions on the liver through imaging tests.

   Source: Dong Chinese Dictionary

4. 长期吸烟会导致肺部组织发生病变。

   cháng​qī xī​yān huì dǎo​zhì fèi​bù zǔ​zhī fā​shēng bìng​biàn.

   Long-term smoking can lead to pathological changes in lung tissue.

   Source: Dong Chinese Dictionary