Cryptococcal Meningitis in A Patient With Giant Cell Arteritis.
A 65-year-old female patient was admitted to the hospital because of persistent headache and fever (37.5-39[degrees]C) of five days duration. She had a history of GCA six years ago and relapsed four months prior to admission. According to our diagnostic work-up, the patient did not have any diseases other than GCA. A written informed consent was obtained from the patient.
Six years ago, the patient was admitted with fever, headache, and transient vision loss. Laboratory findings indicated erythrocyte sedimentation rate of 110 mm/hour (normal 0-20 mm/hour) and C-reactive protein of 100 mg/L (normal <5 mg/L), while the cerebrospinal fluid (CSF) analysis and cranial magnetic resonance imaging were normal. To further clarify the diagnosis, a temporal artery biopsy was performed, and the results confirmed the GCA diagnosis (Figure 1). She was treated with prednisone and azathioprine for about six months. Over the past four years, she did not have any uncomfortable symptoms or receive any drugs.
Four months ago, she relapsed with fatigue, fever, and headache. She was treated with 60 mg prednisone per day and showed improvement in her symptoms of headache and fatigue. Her prednisone dosage was reduced to 25 mg per day and azathioprine 50 mg per day when in hospital at this time.
On admission, the patient was febrile (38.5[degrees]C) and had a moderate headache. Examination was remarkable for neck stiffness and bilateral papilledema. General physical, neurological, and systemic examinations were normal. Laboratory findings were as follows: erythrocyte sedimentation rate of 120 mm/hour (normal 0-20 mm/hour), C-reactive protein level of 125 mg/L (normal <5 mg/L), white blood cell count of 8.8 x [10.sup.9]/L (normal 4 x [10.sup.9]-10 x [10.sup.9]/L) with normal differential count, hemoglobin level of 10.4 g/dL (normal 12-16 g/dL), platelet count of 560 x [10.sup.9]/L (normal 100 x [10.sup.9]-300 x [10.sup.9]/L), and fibrinogen level of 8.2 g/L (normal <4.3 g/L). Other biochemical findings including a test for human immunodeficiency virus were negative or within the reference limits. Computed tomography of the thorax and abdominal ultrasound showed normal findings. Microbiological analysis of urine and multiple blood samples yielded sterile findings. Sternal puncture findings were normal. Laboratory tests for systemic or malignant diseases were negative or within the normal range. CSF analysis showed that India ink staining was positive for cryptococcus (Figure 2). CSF pressure was 22 cm [H.sub.2]O, and contained 10 cells/pL, all lymphocytes, elevated protein (2.38 g/L), low glucose (31 mg/dL), CSF/serum glucose ratio = 0.14, and adenosine deaminase of 7 IU/L. The cranial magnetic resonance imaging was unremarkable (Figure 3). Azathioprine was suspended, prednisone was tapered off to 10 mg per day, and amphotericin B and 5-flucytosine were introduced for six weeks. Clinical response was good. There were no neurological sequelae or relapse after 20 months of follow-up.
Giant cell arteritis is the most common primary vasculitis,  predominantly affecting older individuals. Common manifestations include headache, fever, morning stiffness and pain in the shoulder and/or hip girdle, ischemic stroke, visual disturbance, and/or permanent vision loss. GCA often requires high and sometimes sustained corticosteroid therapy to prevent the development of sight-threatening complications.  Nearly half of the patients experience relapses during the tapering of glucocorticoids and recurrence on glucocorticoid withdrawal. [8,9] In these patients, glucocorticoid therapy can rapidly lead to infectious complications, mainly with opportunistic pathogens.
Our patient's presenting symptoms were persistent headache and fever, later followed by vomiting. The diagnosis of this patient was cryptococcal meningitis with features of elevated intracranial pressure and the differential diagnosis included GCA relapse and other septic meningitis. Any intracranial space-occupying lesion was excluded by the normal brain imaging.
Various opportunistic infections have been reported in patients with GCA, including invasive aspergillosis, nocardiosis, tuberculosis, varicellazoster infection, and pneumocystis pneumonia. [10-12] However, C. neoformans infection has seldom been reported. Hedderwick et al.  reported that a 77-year-old GCA patient was admitted to hospital with dyspnea and culture of bronchoalveolar fluid yielded C. neoformans. Revest et al.  reported four cases of cryptococcal infection (three meningitis) in patients whose immunosuppression was related to chronic lymphocytic leukemia, giant cell temporal arteritis, gastric neoplasm and lupus, respectively.
Giant cell arteritis patients appear to be at risk for opportunistic infections for at least three possible reasons. First, the most important of these risk factors is the use of high-dose long-term corticosteroids. Owing to immunosuppression, treatment-related infections are common and represent an important cause of early mortality. [14,15] Second, most reports have included patients over 65 years of age, and aging has been shown to decrease both cellular immunity and humoral immunity in humans. [16,17] Third, the presence of GCA itself may increase susceptibility to infection through macrophage and T cell activation leading to dysregulation of the immune system. [18,19]
The older adult may also present with atypical manifestations of meningitis, although cryptococcal meningitis in GCA patients has rarely been reported. When patients have a headache with corticosteroids usage, cryptococcal meningitis should be considered and excluded.
Declaration of conflicting interests
The authors declared no conflicts of interest with respect to the authorship and/or publication of this article.
The authors received no financial support for the research and/or authorship of this article.
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Jin Lv, (1) Qiankun Zhang (2)
(1) Department of Neurology, Lishui People's Hospital, Lishui, China (2) Department of Rheumatology, Lishui Central Hospital, Lishui, China
Received: February 25, 2017 Accepted: March 06, 2017 Published online: April 04, 2017
Correspondence: Qiankun Zhang, MD. Department of Rheumatology, Lishui Central Hospital, 323000 Lishui, China. Tel: +86-578-268 1234 e-mail: email@example.com
Caption: Figure 1. Temporal artery biopsy showing mononuclear cell infiltration (H-Ex200).
Caption: Figure 2. Cerebrospinal fluid analysis showing positive India ink staining for cryptococcus (x400 magnification).
Caption: Figure 3. Cranial magnetic resonance imaging was normal.
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|Title Annotation:||CASE REPORT|
|Author:||Lv, Jin; Zhang, Qiankun|
|Publication:||Turkish Journal of Rheumatology|
|Date:||Dec 1, 2017|
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