Rheumatic diseases associated with immune checkpoint inhibitors in cancer immunotherapy

Elevated CK from immune checkpoint inhibitor- related hypophysitis: a case report

Immune checkpoint inhibitors (ICIs), have emerged to the forefront of management for various advanced cancers, such as melanoma, lung cancer and renal cell carcinoma. Immune checkpoints such as CTLA-4 and PD-1 serve to inhibit T cell activation and signaling; therefore through blockade of these pathways, ICIs promote anti-tumour immune activation. However, as a result of T cell disinhibition, ICIs have been reported to cause immune related adverse events (irAEs) affecting numerous organ systems. One of the most serious and potentially life-threatening irAE is inflammatory myositis. Myositis, which generally presents with progressive proximal muscle weakness and elevated serum creatine kinase (CK), has been reported in <1% of patients who have received ICI therapy. A rare cause of elevated CK is adrenal insufficiency, which has been reported in up to 6% of ICI users. Here we report a case of ICI-related hypophysitis related myopathy that was initially misdiagnosed as ICI-associated inflammatory myositis. This case illustrates the importance of considering a wide differential when assessing hyperCKemia in the setting of ICI use.

Immune checkpoint inhibitor-associated arthritis in advanced pulmonary adenocarcinoma: A case report

BACKGROUND

With the wide application of immune checkpoint inhibitors (ICIs) in cancer treatment, immune-related adverse events occur frequently, involving almost all organs and systems. The incidence of ICI-associated arthritis (IA) is unknown. In most cases, IA is not serious and non-lethal. Higher checkpoint inhibitor arthritis disease activity may be associated with cancer progression. Here, we report a severe case of IA with high arthritis disease activity in advanced pulmonary adenocarcinoma, causing permanent withdrawal of pembrolizumab, but the patient remained in complete remission (CR) 20 mo after the development of IA.

CASE SUMMARY

An 81-year-old smoking man was admitted to our hospital because of left chest pain for 9 mo. He was finally diagnosed with advanced pulmonary adenocarcinoma, with programmed cell death 1 ligand 1 expression of 70%. The patient responded to pembrolizumab treatment and achieved CR, but IA occurred after the 5th cycle of pembrolizumab administration. Although non-steroidal anti-inflammatory drugs and disease-modifying anti-rheumatic drugs were prescribed, arthralgia and joint swelling occurred. The symptoms of arthritis were further aggravated when immunotherapy was given again after short-term withdrawal. Clinical Disease Activity Index (CDAI) score, a traditional measure of arthritis activity, was 43. Intravenous methylprednisolone was prescribed at 20 mg/d and then tapered over the subsequent 4 wk. The symptoms of arthritis steadily improved and completely resolved 4 mo after withdrawal of pembrolizumab. A recent follow-up in June 2022 revealed satisfactory clinical recovery of arthritis and the patient remained in CR.

CONCLUSION

This case report highlights that early recognition of IA and appropriate treatment are critical to improving the outcome of both ICI-arthritis and lung cancer.

Should we be Afraid of Immune Check Point Inhibitors in Cancer Patients with Pre-Existing Rheumatic Diseases? Immunotherapy in Pre-Existing Rheumatic Diseases

Background:

Cancer immunotherapy is rapidly expanding but its clinical efficacy is hampered by immune related adverse events (ir-AE). There is a concern regarding patients with pre-existing auto-immune diseases (PAD) undergoing immunotherapy.

Methods:

An electronic search was performed (Medline) to identify cases of patients with PAD treated with immune checkpoint inhibitors (ICI).

Results:

Published data are rather limited but continue to emerge. Patients with PAD exhibit a high risk of PAD flare and/or de novo ir-AE. In most cases PAD flares and de novo irAEs were not severe and could be managed effectively with standard treatment.

Conclusions:

This risk in patients with PAD appears acceptable, and therefore, these patients could receive immunotherapy under close monitoring. Collaboration of oncologists and rheumatologists for the management of these patients is crucial.

Rheumatic Manifestations and Diseases From Immune Checkpoint Inhibitors in Cancer Immunotherapy

Immune checkpoint inhibitors (ICIs), which can enhance antitumor immunity and inhibit cancer growth, have revolutionized the treatment of multiple cancers and dramatically decreased mortality. However, treatment with ICIs is directly associated with immune-related adverse events (irAEs) because of inflammation in off-target organs and autoimmunity resulting from non-specific immune activation. These irAEs can cause rheumatic diseases and manifestations such as inflammatory arthritis, polymyalgia rheumatica, myositis, vasculitis, Sicca and Sjogen's syndrome, and systemic lupus erythematosus. Early diagnosis and treatment of these adverse events will improve outcomes and quality of life for cancer patients. The treatment of rheumatic diseases induced by ICIs requires multidisciplinary cooperation among physicians. Furthermore, the underlying mechanisms are not fully understood and it is difficult to predict and evaluate these side effects precisely. In this review, we summarize available studies and findings about rheumatic irAEs, focusing mainly on the clinical manifestations, epidemiology, possible mechanisms, and guiding principles for treating these irAEs.

Mycosis fungoides development after combined immune checkpoint blockade therapy in a patient with malignant melanoma: a case report

Immune checkpoint blockade therapy can induce immune-related toxicity, but cutaneous lymphoma development has not been reported. A 56-year-old woman presented with two well-demarcated erythematous macules on the right sole and vitiligo on her extremities. Her facial melanoma had been treated with combination therapy (ipilimumab and pembrolizumab), followed by pembrolizumab monotherapy, a year prior. Microscopy revealed small-to-medium-sized lymphocytes permeating along with the basal epidermal layer. These were immuno-positive for CD2, CD3, and CD5, and showed complete CD7 loss; CD30, TCR-beta F1, and PD-1 were also detected. They exclusively expressed CD8, not CD4, and had a Ki-67 labeling index of 30-40%. Epstein-Barr virus in-situ hybridization was negative. Clonal T-cell receptor beta and gamma chain gene rearrangements were detected. Hence, the lesions were diagnosed as mycosis fungoides. This is the first report of mycosis fungoides development after anti-melanoma immunotherapy. The patient is currently on steroid ointments and phototherapy.

Immune checkpoint inhibitor-induced inflammatory arthritis: identification and management

INTRODUCTION

Immune checkpoint inhibitors (ICIs) have proved to be groundbreaking in the field of oncology. However, immune system overactivation from ICIs has introduced a novel medical entity known as immune-related adverse events (irAEs), that can affect any organ or tissue. ICI-induced inflammatory arthritis (ICI-IIA) is the most common musculoskeletal irAE and can lead to significant morbidity and limitation in anti-cancer therapy.

AREAS COVERED

In this review, the authors focus on ICI-IIA. Relevant articles were identified through PubMed searches, spanning 2010 to the present. The authors detail the current understanding of its pathogenesis, diagnostic evaluation, and management strategies.

EXPERT OPINION

ICI-IIA is a complex irAE that we are just beginning to understand mechanistically and pathologically. It often presents later in the disease course than other irAEs and, due to various reasons, is under-recognized. In some patients, ICI-IIA may become a chronic disease, which distinguishes it from most irAEs that resolve after ICI discontinuation. Multiple important questions still demand further research including which patients may develop ICI-IIA? What are possible diagnostic and prognostic markers? Do anti-arthritis therapies interfere with the anti-tumor response? and when should steroid-sparing agents be initiated? Close collaboration and shared decision-making between oncologists, rheumatologists, and the patient are essential when managing this particular irAE.

Diagnosis and Treatment of Rheumatic Adverse Events Related to Immune Checkpoint Inhibitors

Immune checkpoint inhibitors (ICIs) have completely changed the treatment of cancer, and they also can cause multiple organ immune-related adverse reactions (irAEs). Among them, rheumatic irAE is less common, mainly including inflammatory arthritis, rheumatic myalgia/giant cell arteritis, inflammatory myopathy, and Sjogren's syndrome. For oncologists, rheumatism is a relatively new field, and early diagnosis and treatment is very important, and we need to work closely with experienced rheumatologists. In this review, we focused on the incidence, clinical characteristics, and treatment strategies of rheumatic irAE.

A case report of immune-mediated arthritis in a patient with cutaneous melanoma receiving checkpoint inhibition therapy

INTRODUCTION

Immune checkpoint inhibitors (ICIs) represent an important advance in the treatment of melanoma. ICIs may induce autoimmune phenomena caused by concurrent activation of the immune system against normal cells. During the last years, cases of musculoskeletal side effects, especially immune-mediated arthritis (IA), have been increasingly reported.

PATIENT CONCERNS

We present a 59-year-old woman, who was treated with pembrolizumab for a relapsed BRAF V600E mutated cutaneous malignant melanoma. The patient presented with right knee arthritis on week 30.

DIAGNOSIS

The erythrocyte sedimentation rate and serum C-reactive protein levels were elevated, while rheumatoid factor and anti-cyclic citrullinated peptide antibodies were negative. Imaging confirmed the presence of fluid mainly in the suprapatellar bursa. Synovial fluid analysis revealed an inflammatory effusion, while other etiologies of inflammatory arthritis were excluded.

INTERVENTIONS

Arthritis improved with an intra-articular injection of 8 mg dexamethasone. Twelve days later the arthritis relapsed in both knees, and although it was resistant to nonsteroidal anti-inflammatory treatment, it improved with systemic steroids. Tapering of methylprednisolone dose was feasible with the coadministration of leflunomide and subsequently hydroxychloroquine.

OUTCOMES

Arthritis resolved and the patient is free of complications and disease activity 20 months after the initiation of the second line systemic treatment.

CONCLUSIONS

We present an unusual case of IA associated with pembrolizumab treatment. The originality of the current report is based on the late occurrence, the monoarticular initial distribution, and uncommon location of IA at the knee.

A Case of Severe Seronegative Inflammatory Arthritis due to Nivolumab and Review of the Literature

Immune-checkpoint inhibitors (ICIs) have revolutionized the treatment of cancer, yet therapy is often hampered by immune-related adverse events (irAEs) which range from mild to severe life-threatening events. Musculoskeletal (MSK) irAEs leading to discontinuation of ICIs are uncommon but increasingly recognized. We report a challenging case of severe immune-related seronegative inflammatory arthritis due to nivolumab in a patient with stage IV metastatic adenocarcinoma.

Rheumatic complications in cancer patients treated with immune checkpoint inhibitors

Immune checkpoint inhibitors (ICIs) have revolutionized anticancer therapy due to their long-term clinical benefits and immune boosting mechanisms. However, despite their consistent therapeutic effects, the use of ICIs is associated with a spectrum of adverse events due to their autoimmune and auto-inflammatory actions. These adverse events can affect any organ system, including the endocrine, neurologic, gastrointestinal, cardiac, skin, pulmonary, and musculoskeletal systems. Of the immune-related adverse events (irAEs), rheumatic complications are common and appear to be distinct from irAEs in other organs in terms of variability of onset time, capacity for persistence, and relationship with pre-existing autoimmune rheumatologic diseases. In this article, we review the mechanisms of the anti-cancer effects of ICIs, the irAEs of immuno-oncology drugs, and the general recommendations for managing irAEs. In particular, we focus on rheumatologic irAEs and discuss their prevalence, clinical characteristics, and management.