Rare presentation of intractable tuberculous panophthalmitis with intraocular and intraorbital abscesses: a case report
Journal of Medical Case Reports volume 11, Article number: 180 (2017)
We report a rare presentation of extrapulmonary tuberculosis.
A 29-year-old Burmese woman with human immunodeficiency virus infection and known pulmonary tuberculosis who had been treated for 5 months presented to our hospital with unilateral progressive painful visual loss of 1 month’s duration. She was diagnosed with tuberculous panophthalmitis with subretinal and intraorbital abscesses, conjunctival abscess, and extraocular muscle tuberculoma. The diagnosis was confirmed by a conjunctival pus swab with a positive result for acid-fast bacilli and a positive result for a mycobacterial culture. There was high suspicion of multidrug-resistant tuberculosis. Despite receiving ongoing aggressive treatment with conventional antituberculous medications, this patient required subtotal orbital exenteration to control her infection and prevent further progression. Second-line antituberculous medications were added to the first-line therapy, with satisfactory results achieved.
Tuberculous panophthalmitis with intraocular and intraorbital abscesses is a rare presentation of extrapulmonary tuberculosis. Patients who do not respond to first-line antituberculous therapy might be infected with either single-drug or multidrug-resistant Mycobacterium tuberculosis. Patient compliance is one of the key factors that can alter the course of treatment. Careful patient monitoring can improve disease progression, outcome, and prognosis.
Mycobacterium tuberculosis (Mtb) is an obligate pathogenic bacterial species in the family Mycobacteriaceae. Inhalation of this organism causes pulmonary infection. Hematogenous spread as a result of a ruptured pulmonary granuloma leads to multiple organ involvement, including the eye . Failure to identify tuberculous mycobacterial ocular infection can lead to permanent visual damage, with uncontrolled infection potentially resulting in death . We report a rare and serious case of a patient with extrapulmonary tuberculosis (EPTB) who presented with tuberculous panophthalmitis with intraocular and intraorbital abscesses, despite ongoing aggressive treatment with conventional antituberculous therapy (ATT).
A 29-year-old Burmese woman with human immunodeficiency virus (HIV) infection who had been diagnosed with pulmonary tuberculosis was initially treated with isoniazid 300 mg/day, rifampicin 450 mg/day, pyrazinamide (unknown dosage), and ethambutol 800 mg/day for 2 months. After a 2-month course of this four-drug regimen, pyrazinamide was discontinued. Five months after the initiation of ATT, the patient developed pain, redness, and blurred vision in her right eye. Two weeks later, her right eye became no light perception and exhibited proptosis with the presence of purulent discharge. Orbital computed tomography (CT) showed large intraconal, periorbital, and preseptal abscesses. She was then admitted to the primary care hospital and was treated for orbital cellulitis with a 1-g ceftriaxone infusion twice daily. Oral ciprofloxacin 500 mg twice daily was added 4 days later. Tobramycin eye drops 0.3% four times daily and tobramycin eye ointment twice daily were given.
The result of a conjunctival pus swab was positive for 1+ acid-fast bacilli (AFB), and a culture revealed clusters of Staphylococcus spp. Despite an escalation of ATT and antibiotics for 1 week, the patient’s clinical condition continued to worsen. She was then referred to our institution, Siriraj Hospital, Thailand’s largest university-based tertiary referral center. Upon arrival, her right eye showed marked chemosis with a large subconjunctival inferotemporal abscess (Fig. 1a). She had 3+ anterior chamber cells, mutton-fat keratic precipitates, ectropion uvea, and iris neovascularization. Exophthalmometry at 104-mm base showed a protrusion of the right eye of 20 mm, compared with 13 mm in the left eye. The right lateral gaze and down gaze of her right eye were limited at 5 and 10 degrees, respectively. A dilated fundus examination showed a dense vitreous hemorrhage. An unclear subretinal lesion was identified. Her left eye was unremarkable. B-scan ultrasonography of her right eye showed an irregular globe contour and inhomogeneous vitreous echogenicity. A 13.3 mm×15 mm mass with a high initial A-scan spike and low to moderate internal reflectivity was identified underneath a high A-scan spike membrane-like lesion that extended beyond the globe into the orbital cavity (Fig. 1b).
Orbital CT was repeated, which showed an intraocular multiloculated ring contrast-enhanced mass that extended to the right orbit (Fig. 1c and d). The optic nerve, lateral rectus muscle, and inferior rectus muscle of the right eye were enlarged. The conjunctival pus swab was repeated, which stained positive for AFB. The patient’s CD4 cell count was 123 cells/mm3. An infectious disease (ID) specialist immediately ordered second-line ATT (750-mg amikacin infusion, 500-mg levofloxacin infusion, oral clarithromycin 1 g/day, and para-aminosalicylic acid 8 g/day). With the fact that the infection was intense and was not responding to conventional ATT, despite the previous 5 months of ATT treatment. The risk of progression to the central nervous system was weighed against preservation of the eyeball. With a discussion between the patient and the medical team, a decision was made to perform subtotal orbital exenteration. A large number of scleral and intramuscular tuberculomas were identified. One large subretinal abscess (14 mm×10 mm×10 mm) was present that extended to the orbital cavity through a scleral perforation. Pathological study of exenterated tissue revealed chronic granulomatous inflammation and caseous necrosis, which was positive for AFB stain and compatible with mycobacterial infection (Fig. 2). Cultured tissue was negative for mycobacterium. Three months later, the result of a conjunctival pus swab culture was positive for drug-susceptible Mtb. The ID specialist recommended continuation of the second-line oral ATT for 18 more months. There was no sign of recurrent tuberculous mycobacterium infection around the exenterated wound at the patient’s last visit, the 6-month follow-up, at Siriraj Hospital. After that visit, she was transferred back to her primary care hospital to complete her course of treatment. Highly active antiretroviral therapy, or HAART, was initiated afterward at the primary care hospital according to the health care policy in Thailand.
Reports of tuberculous panophthalmitis and/or orbital tuberculosis with or without orbital abscess are infrequent. As described in Table 1, many patients have either panophthalmitis or orbital infection, unlike our patient, who had extensive panophthalmitis and orbital abscesses despite 5 months of conventional ATT. Our patient’s presentation led to a high suspicion of drug-resistant tuberculosis. In a study done in China, researchers reported that the prevalence of any resistance to first-line drugs was 33.2% and that the prevalence of multidrug-resistant tuberculosis (MDR-TB) was 5.7% . Wilson and Tsukayama reported risk factors for the development and perpetuation of drug-resistant Mtb, as shown in Table 2 . Our patient had drug-susceptible Mtb; thus, drug resistance was not responsible for the poor treatment outcome in her case. Poor ATT compliance was likely the main causative factor. Directly observed treatment, short course (DOTS), especially with an individualized treatment regimen, is considered a successful method to improve cure rate and treatment completion in many centers ; moreover, DOTS can also prevent the development of drug resistance . Statistical analysis to evaluate associated risk factors for developing tuberculous mycobacterial orbital abscess and/or panophthalmitis and visual prognosis has not been achievable, owing to the small number of cases in this patient population. For patients with HIV infection, debate continues regarding the ideal timing of HAART initiation and concomitant administration with ATT. The advantages of early HAART administration include higher cure rates, reduced risk of relapse, reduced risk of other HIV-associated opportunistic infections, and lower mortality rates. On the other hand, the disadvantages of early HAART initiation include potential drug interaction with rifampicin, thus limiting coadministration of selected protease inhibitors. This could result in cumulative toxicity, therapeutic failure, and risk of immune reconstitution inflammatory syndrome [2, 7]. Our patient had not received HAART until almost 1 year after she was first diagnosed with EPTB infection.
Close and careful observation of patients undergoing ATT is absolutely essential. Poor compliance is one of the main risk factors for developing MDR-TB. Even in cases where there is no drug resistance, poor compliance can alter treatment outcome and prognosis, as evidenced by the course and outcome of our patient.
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The authors acknowledge Wilawan Sanpan for preparation of the manuscript for submission.
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All authors made substantial contributions to the case report’s conception and design, acquisition of data, and analysis and interpretation of data. PC and SB were involved in drafting the manuscript and revising it critically for important intellectual content. PC gave final approval of the version to be published. All authors read and approved the final manuscript.
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Boonsopon, S., Tesavibul, N., Uiprasertkul, M. et al. Rare presentation of intractable tuberculous panophthalmitis with intraocular and intraorbital abscesses: a case report. J Med Case Reports 11, 180 (2017). https://doi.org/10.1186/s13256-017-1353-9