Primary Care
Physician perspectives on preventive care, chronic disease management, and evidence-based primary care practice.
Recent Discussions
What is your approach to treating refractory thrombocytopenia in lupus?
Refractory thrombocytopenia is challenging to treat. It is important to evaluate for non-SLE causes including infection, medications, and malignancy. It is also important to differentiate ITP from TTP/atypical HUS. Once the ITP diagnosis is confirmed, I usually don't treat asymptomatic thrombocytop...
Are there particular concerns related to the use of B-cell depletion therapies such as rituximab for rheumatic disease during the COVID-19 pandemic?
The attendant depletion of CD20+ B cells associated with treatment with rituximab likely results in impaired development of host immunity to previously unrecognized microbial pathogens. This has, therefore, been of concern in the context of the Covid-19 pandemic due to potential greater adverse outc...
How does the presence of myositis alter your interpretation of cardiac enzymes when evaluating acute chest pain?
Troponin T and CK-MB are not reliable for cardiac issues in myositis as regenerating muscles produce these enzymes. This is especially true if the patient has an active disease with weakness and CK elevation. Troponin I is not much affected by muscle enzymes and should be used as a parameter to eval...
How do you approach diagnosing a patient with Iron Refractory Iron Deficiency Anemia (IRIDA)?
Iron-Refractory Iron Deficiency Anemia should be suspected when there is a lack of response to oral iron and only a partial response to intravenous iron. One should make sure there is not a chronic underlying inflammatory process to explain the lack of iron absorption or lack of the expected respons...
Do hemoglobin S levels always correlate with SCD phenotype?
The severity of sickle cell disease (SCD) is usually associated with the level of hemoglobin S (HbS). For example, HbSS and HbSB0 thalassemia, which generally have higher HbS levels, are usually more severe than HbSC and HbSB+ thalassemia. While patients with HbSC and HbSB+ thalassemia typically hav...
Is there a role for anti-neutrophil antibody testing in the workup of neutropenia?
In my view, anti-neutrophil antibodies add little to the work-up of neutropenia. Drs. @Dr. First Last and @Dr. First Last presented an abstract at ASH in 2015 that summarized restyles for 60 pediatric persons with a diagnosis of autoimmune or idiopathic neutropenia. The sensitivity and specificity o...
What are the benefits of sending HLA B27 genotype over HLA B27 antigen when evaluating for spondyloarthritis?
HLA-B27 is strongly associated with ankylosing spondylitis (AS) which is an inflammatory rheumatic disease that affects the spine, the sacroilliac joints, and peripheral joints. It is also associated with other diseases like acute anterior uveitis, inflammatory bowel disease, or psoriasis. HLA-B27 t...
How would you manage a patient with type 1 cryoglobulinemia secondary to MGUS?
Rituxan can be tried if IgM type MGUS. Please find the attached ASH article on How I treat cryoglobulinemia by Muchtar, Magen, and Gertz; PMID 27799164.
Is there a role for measuring hydroxychloroquine blood levels in clinical practice?
This is being actively investigated by a number of groups around the world, with no final consensus, but the groups in France have studied this the longest, and published the most, to date. The major outcome has been that some (quite a few) patients had very low levels, who admitted on careful quest...
How does a history of splenectomy alter how you counsel patients on the infection risk of TNF inhibitors or other biologics?
In general, a history of splenectomy would lead to an increased concern regarding infections with parasitemia and encapsulated organisms (particularly Strep. pneumoniae, Haemophilus influenzae type b, and Neisseria meningitides). However, I would not consider prior splenectomy an absolute contraindi...