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Tongue necrosis secondary to giant cell arteritis, successfully treated with tocilizumab: a case report
BMC Musculoskeletal Disorders volume 24, Article number: 382 (2023)
Abstracts
Background
Giant Cell Arteritis (GCA) is a large vessel vasculitis that most commonly presents with headache, scalp tenderness, jaw claudication, and vision changes. Various other, less common, manifestations have been reported in the literature such as scalp and tongue necrosis. Though most patients respond to corticosteroids, some cases of GCA are refractory to the high doses of corticosteroids.
Case presentation
We present a 73-year-old female with GCA refractory to corticosteroids presenting with tongue necrosis. This patient significantly improved with a dose of tocilizumab, an IL-6 inhibitor.
Conclusion
To the best of our knowledge, this is the first case report of a patient with refractory GCA presenting with tongue necrosis that had rapid improvement with tocilizumab. Prompt diagnosis and treatment can prevent severe outcomes such as tongue amputation in GCA patients with tongue necrosis, and tocilizumab may be effective for corticosteroid-refractory cases.
Background
Giant cell arteritis (GCA) is a large vessel vasculitis. The clinical manifestations can involve systemic, neurologic, and ophthalmologic complications.
In GCA, the immature vascular dendritic cells (DCs) at the adventitial-medial interface of large vessels activate naïve CD4 T cells, which differentiate to Th1 and promotes the activation of macrophages, intramural infiltration of giant cell granuloma formation leading to hyperplasia of the intimal layer of the artery, and end-organ ischemia. The activated macrophages produce IL-6 and IL-1B, differentiating the naïve CD4 + T cells into Th17 effector cells. The clinical manifestations can be heterogenous and include but are not limited to temporal headaches, scalp tenderness, jaw claudication, sudden permanent visual loss, transient monocular or binocular vision impairment such as visual blurring, vision loss, or diplopia. Less common manifestations include, lingual, scalp, or lip necrosis, peripheral neuropathy, facial, submandibular swelling, and audiovestibular disturbance [1]. The lingual artery is the first branch of the external carotid artery and can manifest with edema, pallor, pain, and intermittent claudication [2]. The description is rare, but it can affect the older population and can be associated with more visual symptoms. The complications include lingual ischemia and necrosis. We present a case of a patient with GCA, who presented with tongue necrosis despite being on high doses of corticosteroids.
Case presentation
A 73-year-old female, with a past medical history of a cerebral aneurysm, hypertension, and dyslipidemia presented on 11/25/2022 with sudden onset of headache, right jaw pain, and visual impairment for three days. The patient noticed intermittent spotty vision affecting the right eye and impacting her daily activities. She described having bilateral throbbing headaches at the temporal areas without relief after taking acetaminophen 650Â mg daily.
In the emergency room, her laboratory were white blood cell (WBC) 12.93 K/uL (NR 3.8–10.5 K/uL), hemoglobin 12.2 g/L (NR 11.5–15.5 g/dL), platelet 582 K/uL (150–400 K/uL), AND alkaline phosphatase 98 U/L (40–120 U/L). The inflammatory markers were elevated, erythrocyte sedimentation rate (ESR) 98 mm/hr (NR 0–29 mm/hr), and C-reactive protein (CRP) 150 mg/L (NR < 8 mg/L). A Computerized tomography angiogram (CTA) of the head and neck was negative. CTA of the chest and a transthoracic echocardiogram (TTE) were negative for large vessel involvement. Rheumatology was consulted to evaluate for possible GCA. Upon further history taking, the patient endorsed bilateral shoulder and hip pain with morning stiffness over the past three weeks, consistent with polymyalgia rheumatica (PMR). On physical exam, the patient had a diminished right temporal artery pulse compared to the left. A funduscopic exam by an ophthalmologist was remarkable for sharp and mild pallor optic nerve without edema or hemorrhage. The patient was started on intravenous (IV) methylprednisolone 1 g daily for three days. On the second day of admission, the patient endorsed significant improvement in her vision, jaw claudication, and headache. Subsequently, on 11/30/2022 the patient underwent bilateral temporal artery biopsies. On day four, the patient was transitioned to prednisone 60 mg daily, which was continued upon discharge. The pathology report of the temporal artery biopsies showed temporal arteritis on Hematoxylin and Eosin, trichrome and elastic stains (Fig. 1).
Within a week of discharge, on 12/8/2022 the patient reported new onset tongue swelling and pain as well as worsening jaw claudication. Upon examination, the patient was noted to have edema of the left side of the tongue and an ulcerative lesion on the ventral portion of the tongue (Fig. 2). The patient reported compliance with taking prednisone 60 mg daily. Her inflammatory markers on admission were remarkable for an ESR of 53 mm/hr (NR 0–29 mm/hr), and CRP of 4.9 mg/L (NR < 8 mg/L). The patient was restarted on 1 g of IV methylprednisolone in the emergency room and was admitted for further evaluation. The ulcerative lesion was swabbed to evaluate for a viral infection such as herpes simplex, herpes zoster, and COVID-19, which came back negative [3]. On 12/11/2022, the patient received 350 mg (6 mg/Kg) intravenous tocilizumab with the plan to repeat in 4 weeks. Four days after the infusion of tocilizumab, the patient noticed a significant improvement in jaw pain and tongue swelling (Fig. 2). On 12/14/2022, the patient was able to tolerate oral intake and was discharged on prednisone 40 mg daily. Since her discharge, the tongue necrosis has resolved, and she has been continued on monthly tocilizumab infusions and she is on tapering doses of prednisone (Figs. 3 and 4).
Discussion and conclusions
Tongue necrosis is an uncommon clinical manifestation of GCA, manifesting with tongue ulcers, edema, pallor, and pain. The tongue’s main blood supply comes from the lingual artery, a branch of the external carotid artery [4]. Tongue necrosis as a manifestation of GCA was first reported in 1959, and 21 cases have been reported since then [5]. The findings of our literature review are detailed in Table 1. Based on our findings, the average age of the patients was 77 ± 7.45 years, and the female-male ratio of 17:4. 14 out of 21 cases reported headache with jaw pain, and 77 cases with visual involvement. Tongue manifestations included pain, pallor, cyanosis, and necrosis. Among 21 cases, only 1 case had extra-cranial large vessel vasculitis which showed in the fluorodeoxyglucose (FDG)-PET without clinical manifestations. The diagnosis of GCA was based on clinical manifestations, elevated inflammatory markers, temporal artery biopsies in 16 cases and 1 case proven by temporal artery ultrasound alone. Most patients responded well to corticosteroids (doses ranging from prednisone 1 mg/kg to methylprednisolone 1000 mg) and three required tongue amputations. One case reported a good response to concomitant use of corticosteroids and tocilizumab as first line therapy due to extensive involvement of the arterial bed based on abnormal ultrasound findings of the deep lingual artery that included halo sign, increased intima media thickness and markedly reduced blood flow [6].
When evaluating tongue necrosis, several important differential diagnoses need to be considered, including malignancy (carcinoma, lymphoma, and sarcoma); adverse effects from medications (vasopressin, chemotherapy, and ergotamine); radiation therapy; cardiovascular etiologies (hemorrhage, embolism, and cardiac arrest); infection (syphilis, tuberculosis. Herpes); and systemic vasculitis (giant cell arteritis, and ANCA positive vasculitis) [7]. In our case, the patient tested negative for tuberculosis, and she was not taking any culprit medications. Therefore, due to ongoing high dose steroid therapy, herpetic infection was high in our differential, but was ruled out with a negative PCR from the lesion.
Glucocorticoid resistance is considered in patients with GCA whose reduction of glucocorticoids under 5 mg/day prednisolone equivalent is not possible [25]. Multiple studies have described methotrexate (MTX) as a possible steroid sparing agent and an option to treat GCA refractory to glucocorticoids. However, clinical trials have failed to show compelling outcomes, albeit most studies were done with lower doses of MTX [26]. There has not been enough data for azathioprine, and the only trial that demonstrated remission of disease under 5 mg of prednisone was not statistically significant [27]. The use of cyclophosphamide was reported in a case series, but no randomized controlled trials were conducted in GCA [28]. Eight of 10 cases achieved remission, but only in combination with an additional steroid-sparing agent such as MTX, AZA, or mycophenolate (MMF). TNF-inhibitors such as infliximab or etanercept showed no superiority in reducing corticosteroid dose [29, 30].
After the publication of the GiACTA trial by Stone et al., tocilizumab was approved as a steroid agent for GCA by the Food and Drug Administration (FDA) in 2017. In the trial, the GCA patients on tocilizumab plus a 26-week prednisone taper showed superiority to maintain corticosteroid-free remission compared to those on 52Â week and 26-week prednisone tapers plus placebo [31].
In our case, the patient showed rapid improvement after receiving a single dose of IV tocilizumab. With the exception of a study by Burg et al., which employed tocilizumab as first line treatment, there have been no reports or case studies on the management of corticosteroid-refractory lingual necrosis associated with giant cell arteritis (GCA) using tocilizumab. The IL-6 secreted by Th17 cells has an essential role in GCA patients refractory to glucocorticoids [32], likely explaining our patient's positive outcome to tocilizumab.
In conclusion, GCA has a heterogeneous presentation, and one of the atypical manifestations reported is tongue necrosis. Rapid diagnosis and treatment can prevent dire outcomes such as tongue amputation. IL-6 plays an essential role in GCA pathogenesis, and its inhibition can be used as a treatment for GCA refractory to glucocorticoid therapy. To the best of our knowledge, this is the first case report of tongue necrosis refractory to corticosteroids successfully treated with tocilizumab. The novelty of this case report highlights the importance of keeping a high index of suspicion for potential complications that can develop during the course of the disease despite the corticosteroid treatment. The case raises the highly debated question of starting tocilizumab as the first line agent up front, proposing that it could potentially decrease the risk of severe complications.
Availability of data and materials
The datasets used during the current study are available from the corresponding author on reasonable request.
Abbreviations
- GCA:
-
Giant cell arteritis
- DCs:
-
Dendritic cells
- FDG-PET:
-
Fluorodeoxyglucose-positron emission tomography
- MTX:
-
Methotrexate
- AZA:
-
Azathioprine
- MMF:
-
Mycophenolate
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Acknowledgements
We would like to acknowledge Dr. Marder Galina for providing her expert opinion in this topic.
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YMC, JYL retrieved and corroborated the data. YMC, JP, NK collaborated in the discussion. YMC, DMH, NK, LE collaborated in the internal review and proofreading. All authors contributed to manuscript revision, read, and approved the submitted version.
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Cho, Y.M., El Khoury, L., Paramo, J. et al. Tongue necrosis secondary to giant cell arteritis, successfully treated with tocilizumab: a case report. BMC Musculoskelet Disord 24, 382 (2023). https://doi.org/10.1186/s12891-023-06465-z
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DOI: https://doi.org/10.1186/s12891-023-06465-z