What,s your diagnosis? : a subtle change

We present here a CAT scan from a 45-year-old immunocompromised patient with non-productive cough.

This sign is present in 95% of cases associated to a particulat diagnosis.

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Among HIV-positive patients ground glass opacification (here at the basal right area) is present in 90% of patients with pneumocystic jirovecii pneumonia and absent in 95% of patients who do not have pneumocystic pneumonia.