Subretinal abscess due to presumed tuberculosis in an immunocompetent young diabetic

A man aged 28 years with type 2 diabetes mellitus presented for a baseline ophthalmological evaluation during initiation of antitubercular treatment (ATT). He had undergone a drainage of an abscess in his left elbow and psoas muscle. The PCR analysis of the exudate had revealed Mycobacterium tuberculosis and he had been initiated on ATT (rifampicin 450 mg, pyrazinamide 750 mg, isoniazid 600 mg and ethambutol 1600 mg per day). He had mild pain and diminution of vision in his right eye. On examination, visual acuity of the right …