Coexisting rheumatoid arthritis and sickle cell disease: case series and literature review.

Rheumatoid arthritis (RA) is rarely reported among patients with sickle cell disease (SCD). RA treatment in these patients is believed to be more challenging due to fear of increasing the risk of infection and complications of SCD. We are reporting 7 patients with concurrent SCD and RA.

Association of blood group with COVID-19 disease susceptibility and severity in Saudi Arabia.

Background: Novel SARS-CoV-2 (COVID-19) virus has rapidly spread worldwide and was declared a pandemic, making identifying and prioritizing individuals most at risk a critical challenge. The literature describes an association between blood groups and the susceptibility to various viral infections and their severity. Knowing if a specific blood group has more susceptibility to COVID-19 may help improve understanding the pathogenesis and severity of the disease.

The Saudi clinical practice guideline for the diagnosis of the first deep venous thrombosis of the lower extremity.

The diagnosis of deep venous thrombosis (DVT) may be challenging due to the inaccuracy of clinical assessment and diversity of diagnostic tests. On one hand, missed diagnosis may result in life-threatening conditions. On the other hand, unnecessary treatment may lead to serious complications.