Idiopathic remitting seronegative symmetrical synovitis with pitting edema syndrome associated with bilateral pleural and pericardial effusions: a case report
© The Author(s). 2016
Received: 7 December 2015
Accepted: 13 June 2016
Published: 20 July 2016
Remitting seronegative symmetrical synovitis with pitting edema syndrome is characterized by symmetrical synovitis with pitting edema in the dorsum of the hands or feet. Most cases of remitting seronegative symmetrical synovitis with pitting edema syndrome are idiopathic, but some are secondary to malignancy, autoimmune disease, or neurodegenerative disorders. Pleural and pericardial effusions are unusual complications in idiopathic remitting seronegative symmetrical synovitis with pitting edema syndrome.
A 74-year-old Japanese woman presented to our hospital with arthralgia and pitting edema in her feet. She had pain in multiple joints, peripheral edema, and a markedly elevated erythrocyte sedimentation rate. Enhanced computed tomography and laboratory data showed no evidence of malignancy. These findings suggested that she had idiopathic remitting seronegative symmetrical synovitis with pitting edema syndrome. She also developed respiratory distress because of bilateral pleural and pericardial effusions. Laboratory data showed that serum vascular endothelial growth factor and interleukin-6 were significantly elevated. After administration of steroids, her pleural and pericardial effusions decreased and finally disappeared. Furthermore, vascular endothelial growth factor and interleukin-6 decreased when the pleural and pericardial effusions disappeared.
Here we report the case of a patient with idiopathic remitting seronegative symmetrical synovitis with pitting edema syndrome associated with life-threatening complications, including bilateral pleural and pericardial effusions during the course of the illness, which led to respiratory failure and atrial fibrillation. Elevated vascular endothelial growth factor and interleukin-6 may be associated with the cause of pleural and pericardial effusions in idiopathic remitting seronegative symmetrical synovitis with pitting edema syndrome.
KeywordsRS3PE syndrome Pleural effusions Pericardial effusions VEGF IL-6
Remitting seronegative symmetrical synovitis with pitting edema (RS3PE) syndrome is characterized by symmetrical synovitis with pitting edema in the dorsum of the hands or feet, predominantly involving the hands [1–3]. These symptoms show a good response to low-dose corticosteroids, and remission can be maintained [1–3]. RS3PE syndrome shows a benign clinical course because of the good response to steroid treatment. However, patients with RS3PE syndrome rarely develop pleuritis, which induces pleural effusion [4–8]. Here we report the case of a patient with RS3PE syndrome associated with life-threatening complications including bilateral pleural and pericardial effusions during the course of the illness, which led to respiratory failure and atrial fibrillation.
A 74-year-old Japanese woman gradually developed general malaise and loss of appetite. In addition, arthralgia and pitting edema in her feet appeared. Her laboratory findings revealed an elevated white blood cell (WBC) count and C-reactive protein (CRP). She was admitted to our hospital for further examination. She had an operation for endometrial cancer at the age of 72 and had no family history.
On admission, her blood pressure was 129/76 mmHg, heart rate was 101/minute, respiratory rate was 18/minute, and body temperature was 39.1 °C. A physical examination revealed pitting edema on the dorsum of her hands and feet. Her neurological examination was unremarkable. However, she had difficulty with squatting and walking because of arthralgia in her proximal lower limbs. Laboratory testing showed a WBC of 11700/μL, CRP of 6.7 mg/dL, erythrocyte sedimentation rate of 44 mm/hour, total protein of 5.8 g/dL, and albumin of 2.3 g/dL. Rheumatoid factor, anti Ro/SSA antibody, anti La/SSB antibody, anti Scleroderma 70 antibody, and anti cyclic citrullinated peptide antibody were negative. Serum interleukin-6 (IL-6) and vascular endothelial growth factor (VEGF) were markedly increased to 285 pg/mL (normal; <2 pg/mL) and 1820 pg/mL (normal; 262±228 pg/mL) , respectively. Her human leukocyte antigen (HLA) typing included B7. A chest X-ray revealed mild pleural effusion on the right side. Electrocardiography showed a complete right bundle branch block without ST-T change. Echocardiography revealed a slight pericardial effusion surrounding her entire heart.
RS3PE syndrome was first reported in 1985 by McCarty et al. and is characterized by: 1) good prognosis (Remitting); 2) negativity for antibodies, including rheumatoid factors (Seronegative); 3) symmetry (Symmetrical); and 4) synovitis with pitting edema of the dorsum of the hands and feet (Synovitis with Pitting Edema) . Other common characteristics of RS3PE syndrome include acute onset in older persons, absence of bone erosion, inflammatory findings on blood examination, and painless limitation of movement of the wrist and fingers [2, 3]. Most cases of RS3PE syndrome are idiopathic, although the syndrome has been associated with malignancy, polymyalgia rheumatica, Parkinson’s disease, Sjögren’s syndrome, and ankylosing spondylitis [2, 3]. Our patient had acute onset of bilateral shoulder pain and edema on the dorsum of both feet at the age of 74. These symptoms were resolved by treatment with steroids, indicating the diagnosis of RS3PE syndrome. Because her enhanced CT and laboratory data showed no disease that may have induced RS3PE syndrome, she was diagnosed with idiopathic RS3PE syndrome.
Pleural and pericardial effusion associated with remitting seronegative symmetrical synovitis with pitting edema syndrome
Half steroid pulsea + PSL
Exudative effusion (increased neutrophils)
PSL (10 mg/day)
Exudative effusion (increased neutrophils)
PSL (20 mg/day)
Exudative effusion (increased eosinophils)
PSL (20 mg/day)
Effusion (angioimmunoblastic T-cell lymphoma)
PSL (20 mg/day) + THP-CHOP
Exudative effusion (increased neutrophils)
Steroid pulseb + PSL (15 mg/day)
Several reports suggested that serum IL-6 and VEGF are increased in RS3PE syndrome [2, 10–12], suggesting that these cytokines may be associated with symptoms of RS3PE syndrome. In our patient, serum IL-6 and VEGF were also markedly elevated when pleural and pericardial effusions were increased. After steroid therapy, levels of serum IL-6 and VEGF decreased when pleural and pericardial effusions disappeared. IL-6 is an important cytokine that induces VEGF production . VEGF induces vascular endothelial cell proliferation, enhances angiogenesis, and accelerates vascular permeability . Elevated VEGF and IL-6 may be associated with the cause of pleural and pericardial effusions in idiopathic RS3PE syndrome.
In general, idiopathic RS3PE syndrome is considered to be a benign disorder; however, patients with RS3PE syndrome may develop life-threatening respiratory and circulatory problems due to pleuritis and endocarditis. Therefore, physicians should be aware of these complications when diagnosing RS3PE syndrome and determining treatment.
Our findings suggest that pleuritis and endocarditis are rare complications in idiopathic RS3PE syndrome. These complications may be associated with increased serum VEGF and IL-6.
The authors thank Associate Professor Ko-ichi Takano for his editorial advice.
SY, YF, and SO analyzed and interpreted the patient data regarding the autoimmune disease. SF continued to treat the patient after discharge. JF and YT were major contributors to writing the manuscript. All authors read and approved the final manuscript.
The authors declare that they have no competing interests.
Ethics approval and consent to participate
Written informed consent was obtained from the patient for publication of this case report and accompanying images. A copy of the written consent is available for review by the Editor-in-Chief of this journal.
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