Glucose-6-phosphate dehydrogenase (G6PD) deficiency?,”G6PD deficiency is an X-linked recessive disorder commonly seen in African-American men. It is characterized by episodic hemolysis in response to oxidants drugs, infections, or fava beans. Heinz bodies (red blood cell inclusions) are characteristically seen on the peripheral blood smear

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Lumbar spinal stenosis?,”SS is due to narrowing of the spinal canal, with resulting compression of lumbar nerve roots. The symptoms of SS are posture-dependent. Flexion of the spine causes widening of the spinal canal; extension causes narrowing of the canal. Therefore, the leg pain of lumbar SS is exacerbated by extension of the spine (standing, walking upright) and improved by flexion (sitting, leaning forward). This phenomenon is referred to as “”neurogenic claudication”” as the patient will experience lower-extremity pain with walking that may resemble vascular claudication. Diagnosis of SS is confirmed radiologically with MRI of the spine, and treatment may be conservative (eg, PT, home exercise program) or surgical (eg

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Acute post-streptococcal glomerulonephritis?,”Acute post-streptococcal glomerulonephritis occurs 10-20 days after streptococcal throat or skin infections. It presents with hematuria, hypertension, red cell casts, mild hematuria, and periorbital swelling on physical exam. Another unique feature is very dark urine

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