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Hypocalcemia - Workup Algorithm

Dr Nikhil Lohiya - NEPHKIDS 2020 @NEPHKIDS1

#Hypocalcemia #Workup #Algorithm #differential #diagnosis #endocrinology #causes
Hypocalcemia - Workup ... @NEPHKIDS1 #Hypocalcemia ... differential #diagnosis #endocrinology ... #causes #calcium
Hypocalcemia Laboratory Evaluation

Serum levels of PTH, phosphorus, 25-hydroxyvitamin D, and 1,25-dihydroxyvitamin D can help differentiate between
Hypocalcemia Laboratory ... disorders causing hypocalcemia ... Hypoparathyroidism - Calcium-sensing ... Parathyroid hormone resistance ... Hyperparathyroidism #Diagnosis #Endocrinology
Hypercalcemia Workup and Differential Diagnosis Framework
1) Determine whether PTH-dependent
2) Assess for other hormonal causes
3) Assess for
Hypercalcemia Workup ... other hormonal causes ... for non-hormonal causes ... Diagnosis #algorithm #endocrinology ... #calcium
Causes of Hypercalcemia
Hypercalcemia due to increased bone Ca2+ resorption:
 • Primary hyperparathyroidism, Malignancy, Pseudohyperparathyroidism, Renal failure,
Causes of Hypercalcemia ... histoplasmosis) • Milk (calcium ... #Causes #differential ... #diagnosis #calcium ... #high #endocrinology
Hypomagnesemia (Serum level < 1.7 mg/dL)
Neuromuscular manifestations 
 • Tremor, tetany, seizures 
 • Weakness
dysrhythmias Hypokalemia ... Abnormalities of calcium ... metabolism • Hypocalcemia ... Parathyroid hormone resistance
Hypocalcemia - Differential Diagnosis Algorithm - Low and High Phosphate
LOW PHOSPHATE
 - Low/NormaI PTH
Hypocalcemia - Differential ... Hereditary Vitamin D Resistance ... PTH • PTH Resistance ... Poisoning #Hypocalcemia ... Algorithm #Phosphate #endocrinology
Causes of Hypercalcemia

#Differential #Hypercalcemia #Diagnosis #Causes #Endocrinology
Causes of Hypercalcemia ... #Differential #Hypercalcemia ... #Diagnosis #Causes ... #Endocrinology
Hypocalcemia - Diagnosis and Management
PTH Independent (↑ PTH)
 • LOW VIT D
    -
Hypocalcemia - Diagnosis ... Syndrome - Calcium ... Syndrome • PTH RESISTANCE ... PTH Signaling #Hypocalcemia ... Diagnosis #Management #endocrinology
Hypercalcemia - Differential Diagnosis Algorithm
Elevated PTH (High or normal):
 • Primary Hyperparathyroidism
 • Familial Hypocalciuric Hypercalcemia
Low
Hypercalcemia - ... Hypocalciuric Hypercalcemia ... Bony Mets - Calcium ... Diagnosis #Algorithm #causes ... #endocrinology
Parathyroid Hormone (PTH) Effect in Calcium and Phosphorus
Calcium - Net Effect Hypercalcemia:
   ↑ intestinal
PTH) Effect in Calcium ... and Phosphorus Calcium ... - Net Effect Hypercalcemia ... #parathormone #Calcium ... pathophysiology #endocrinology