A 29-year-old recreational soccer player presents with acute…

A 29-year-old recreational soccer player presents with acute right knee pain after an opponent struck the outside of his knee during a tackle. He reports immediate medial knee pain and swelling, with difficulty bearing weight. On exam, there is localized tenderness along the medial joint line and laxity with valgus stress testing at 30° flexion. Lachman and anterior drawer tests are negative. What is the most likely diagnosis?

As an IT administrator, you are tasked with configuring an A…

As an IT administrator, you are tasked with configuring an Apache web server by modifying the /etc/apache2/apache2.conf file.  You open the file in vi.  As you’re looking at the file, you knock your spill-proof drink container onto the keyboard. It rolls over several keys as you try to pick it up. Now there are extra characters everywhere in the text buffer. Which of the following commands can you use to exit vi without saving any changes that were made to the text buffer?

A 63-year-old man with type 2 diabetes presents with sudden…

A 63-year-old man with type 2 diabetes presents with sudden onset of severe left knee pain, swelling, and redness. He reports fever and difficulty bearing weight. On exam, the joint is hot, swollen, and exquisitely tender with pain at rest and with movement. Which is the likely cause of this joint pain?