Allergy/Immunology
- Erythematous patches with keratotic annular borders on the glans penis
Reactive arthritis was diagnosed on the basis of urethritis, ocular symptoms, circinate balanitis, and sacroiliitis.
- Weight loss, fatigue, and renal failure
A 37-year-old man has gradually lost 100 lb over the past 2 years, with progressive fatigue and malaise.
- To have not and then to have: A challenging immune paradox
The immune reactivation syndrome can occur when the immune system in an immunosuppressed patient with a partially controlled indolent infection is suddenly normalized.
- Drug reaction or metastatic lung cancer?
Imaging shows nodules randomly distributed throughout both lungs, a paradoxical reaction to drug therapy.
- Trust the thyroid thermostat
Why do some physicians persist in regularly following the T3 and T4 levels in addition to the TSH?
- Multiple linear subcutaneous nodules
A 34-year-old woman has an asymptomatic swelling on her foot that has been slowly growing for 15 years.
- Allergen-specific IgE serologic assays define sensitization, not disease (January 2016)
A reader comments on serum IgE testing for allergy (January 2016).
- Celiac disease: Managing a multisystem disorder
This autoimmune disorder can cause symptoms that involve not only the gastrointestinal tract but also the skin and bones.
- The microbiome in celiac disease: Beyond diet-genetic interactions
Evidence points to the mix of bacteria that make the gut their home, collectively called the microbiome.

