2360 results
Mechanism of malignancy-associated hypercalcemia. Abbreviations: 1,25(OH)2D, 1,25-dihydroxyvitamin D; NHL, non-Hodgkin lymphoma; PTH, parathyroid hormone; PTHrP, PTH-related
Abbreviations: 1,25(OH ... non-Hodgkin lymphoma; PTH ... hormone; PTHrP, PTH-related
Hypocalcemia - Differential Diagnosis Algorithm - Low and High PTH
LOW PTH - Hypoparathyroid
 - Congenital (Pediatric)
- Low and High PTH ... LOW PTH - Hypoparathyroid ... Hypomagnesemia HIGH PTH ... - 25-OH D very ... anti-convulsants) - 25-OH
Calcium homeostasis is a process controlled by chiefly by hormones vitamin D and PTH. 
Vitamin D
vitamin D and PTH ... Both 25(OH)D and ... 1,25(OH)2D are ... PTH acts to increase ... #Homeostasis #PTH
Hypercalcemia - Differential Diagnosis Algorithm
Elevated PTH (High or normal):
 • Primary Hyperparathyroidism
 • Familial Hypocalciuric Hypercalcemia
Low
Algorithm Elevated PTH ... Hypercalcemia Low PTH ... Calcitriol (1,25 OH
Hypercalcemia Evaluation
1) Clinical clues
 - Is the patient symptomatic?
 - Family history?
 - Have you done
Evaluation 1) Clinical ... 2) PTH - Frankly ... PTHrp • 25 OH ... VitD & 1,25 OH
Hypocalcemia - Differential Diagnosis Algorithm
 • Low Serum Mg: GI losses, Renal losses, Alcoholism, Malnutrition, Drug-Induced
Drug-Induced • Intact PTH ... Pseudohypoparathyroidism (PTH ... resistance) • Intact PTH ... • Low Serum 25-OH
Tinea Versicolor (Pityriasis versicolor) 
NOT a dermatophyte infection 
Caused by saprophytic, lipid-dependent yeasts 
Clinical 
 •
lipid-dependent yeasts Clinical ... Potassium hydroxide (KOH
Hypercalcemia - Differential Diagnosis Algorithm
Primary Hyperparathyroidism
 • Adenoma
 • Hyperplasia
 • MEN 1 and 2A
Tertiary Hyperparathyroidism
Malignancy • PTH-Related ... Conversion of 25-OH ... D3 to 1,25-(OH)
Lancisi's Sign (Tricuspid Regurgitation) in a patient with Atrial Fibrillation

If you went to med school before
:) One clue: Pt ... finger on the pts ... Pt has permanent ... Fibrillation #Neck #JVP #Clinical ... #Video #AFib #PhysicalExam
Kussmaul's Sign and Friedreich's Sign on Neck Examination

A middle-aged M with unknown PMH presents with dyspnea.
M with unknown PMH ... demonstrated in the video ... Pt was amazed - ... #PhysicalExam #Clinical ... #Video #Cardiology