• Kyle Pfeifer, Vivek Kalra, Adeniran Adebowale, Manisha Juthani-Mehta, and Myung Soo-Shin.
• Department of Radiology, Yale New Haven hospital, New Haven, CT, USA.
• J Radiol Case Rep. 2014 Nov 1;8(11):15-24.

AbstractPneumocystis jiroveci pneumonia is a common acquired immune deficiency syndrome defining illness. Pneumocystis jiroveci pneumonia is classically described as having symmetrical bilateral perihilar ground-glass opacities on chest radiographs. We present an "atypical" case of Pneumocystis jiroveci pneumonia presenting as symmetric biapical cystic spaces with relative sparing of the remainder of the lungs in a 22 year-old male, previously undiagnosed with acquired immune deficiency syndrome. Our case illustrates that formerly unusual presentations of Pneumocystis jiroveci pneumonia are becoming more common as acquired immune deficiency syndrome defining illnesses as more patients are being imaged with further imaging such as high resolution computed tomography.

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