Figure 16.

Unusual and miscellaneous sites of involvement. (A) T1 axial image and (B) T2 axial image of the orbit showing a T1 hyperintense and T2 hypointense mass initially diagnosed on imaging as a choroidal melanoma. The patient had disseminated TB, and the ocular lesion was proven to be a caseating granuloma. (C) High-resolution CT of the temporal bone in a patient with tubercular otomastoiditis showing relative preservation of the ossicular chain and mastoid air cells. (D) Axial CT image, mediastinal window, showing thickening of the pericardium and pericardial effusion.