Hot Tub Lung

File this under terrible afflictions with really funny names: hypersensitivity pneumonitis is also known as hot tub lung, known as it is for being contracted in unclean jacuzzis. Let's hope mycobacterium avium intracellulare, the bacterium that cause the condition and thrive in super-hot water, aren't growing inside your favorite hot tub. Via Radiology Picture of the Day.