New-onset Seropositive Rheumatoid Arthritis Post-mRNA COVID-19 Vaccine: A Case Report.

Growing evidence in the medical literature has linked the COVID-19 vaccine as a potential trigger for the development or exacerbation of various autoimmune rheumatic diseases. To the best of our knowledge, we report one of the first cases of seropositive rheumatoid arthritis diagnosed after the messenger RNA COVID-19 vaccine.

A multicenter longitudinal study of the prevalence and mortality rate of systemic lupus erythematosus patients in Oman: Oman Lupus Study.

AIM: This study is a longitudinal multicenter study which aims to find the prevalence, the demographic data, survival and mortality rates of patients with systemic lupus erythematosus (SLE) in Oman. METHOD: All Omani patients, pediatrics and adults diagnosed with SLE, who fulfill either the 1997 American College of Rheumatology or Systemic Lupus International Collaborating Clinics classifications criteria for SLE were included from January 2006 till February 2020. RESULTS: In total 1160 patients were included in this cohort. Data analysis showed that patient's ages ranged from 2-82 years with female predominance and female-to-male ratio of 7:1 (87.7% female,12.3% male). The mean prevalence of SLE among different age groups was 38.8 (range 5-63 per 100 000 inhabitants). The mortality rate was found to be 5%. Male patients had significantly higher mortality rate than females (7.6% vs 5.4%, P value = .04). Sepsis was the commonest cause of mortality (34%). The coexistence of systemic sclerosis correlates significantly with death (P = .002). Survival analysis in our data showed 5, 10, 20, 40-year survival rates of 100%, 100%, 99% and 90% respectively for antinuclear antibody (ANA) positive patients and lower survival rate for ANA negative patients with 5,10, 20, 40-year survival rates of 100, 99%, 99% and 75%, respectively. CONCLUSION: This study showed that the mean prevalence of SLE in Oman to be 38.8 (range 5-63) per 100 000 inhabitants. The 40-year survival rate among patients with positive ANA was found to be 90%, while patients with negative ANA had worse survival outcomes.

A possible case of systemic lupus erythematosus presenting with generalised oedema.

Systemic lupus erythematosus (SLE) is an autoimmune disease of unknown aetiology affecting various systems within the body. We report the case of a patient with generalised subcutaneous oedema as the only presenting feature, which led to the possible diagnosis of SLE without a specific cause. The patient presented to the Sultan Qaboos University Hospital in Muscat, Oman, in April 2013. The oedema had been present for two years before admission. Other potential causes of oedema in patients with SLE were excluded, including SLE of renal origin and SLE due to protein-losing enteropathy or drugs. This was confirmed by the patient's normal serum albumin level and negative proteinuria. Laboratory investigations showed high levels of positive antinuclear antibodies (>1:640), positive anti-double-stranded deoxyribonucleic acid results, high levels of anti-ß2-glycoprotein 1 and immunoglobulin M and low levels of both complement components 3 and 4. The oedema improved immediately in response to steroids and immunosuppressive medications. Physicians should be aware that generalised subcutaneous oedema can be the only manifestation of SLE.

HLA Antigens in Omani Psoriasis Vulgaris Patients.

OBJECTIVES: To determine the frequency of different HLA-antigens in patients with plaque psoriasis in the Omani Arab population. METHODS: Fifty four Omani patients clinically diagnosed with plaque psoriasis attending the dermatology outpatient clinic in Al-Nahdah Hospital (the tertiary dermatology centre in Oman) were selected for HLA studies. RESULTS: HLA-B52 was present in 20.4% of patients 11/54 and in 5% of controls without psoriasis 5/100. For the association p was <0.004 and the relative risk (RR) was 4.86. CONCLUSION: Psoriasis does not appear to be associated universally with the same HLA antigens. The association of HLA-B52 with plaque psoriasis in Omani patients compares with the HLA-Cw6, -Bw57 and -DR7 preponderance in most other ethnic groups.