15 results
Hypocalcemia - Differential Diagnosis Algorithm - Low and High Phosphate
LOW PHOSPHATE
 - Low/NormaI PTH
Hypocalcemia - Differential ... Diagnosis Algorithm ... ) • Calcium ... High PTH • Secondary ... #Phosphate #endocrinology
Hypocalcemia Laboratory Evaluation

Serum levels of PTH, phosphorus, 25-hydroxyvitamin D, and 1,25-dihydroxyvitamin D can help differentiate between
dihydroxyvitamin D can help differentiate ... : - Hypoparathyroidism ... - Calcium-sensing ... #Diagnosis #Endocrinology ... #Differential
Hypercalcemia - Differential Diagnosis Algorithm
Primary Hyperparathyroidism
 • Adenoma
 • Hyperplasia
 • MEN 1 and 2A
Tertiary Hyperparathyroidism
Differential Diagnosis ... long-standing secondary ... #Differential # ... Diagnosis #Algorithm ... #Endocrinology
Causes of Hypercalcemia
Hypercalcemia due to increased bone Ca2+ resorption:
 • Primary hyperparathyroidism, Malignancy, Pseudohyperparathyroidism, Renal failure,
resorption: • Primary hyperparathyroidism ... histoplasmosis) • Milk (calcium ... #Causes #differential ... #diagnosis #calcium ... #high #endocrinology
Hyperparathyroidism - Primary vs Secondary vs Tertiary 
Lab Comparison:
 • Primary Hyperparathyroidism: ↑→PTH, ↑Calcium, ↑Vitamin D,
- Primary vs Secondary ... Tertiary Lab Comparison ... : ↑→PTH, ↑Calcium ... : ↑PTH, ↓→Calcium ... #diagnosis #endocrinology
Hypercalcemia - Differential Diagnosis Algorithm
Elevated PTH (High or normal):
 • Primary Hyperparathyroidism
 • Familial Hypocalciuric Hypercalcemia
Low
Differential Diagnosis ... normal): • Primary Hyperparathyroidism ... Bony Mets - Calcium ... #Differential # ... #causes #endocrinology
Causes of Hypocalcemia - Differential Diagnosis Algorithm
 • Extravascular: Pancreatitis, surgery, acute phosphate intake and renal
Causes of Hypocalcemia ... - Differential ... Drug induced: Calcium ... Hyperphosphatemia, Low PTH: Hypoparathyroidism ... contrast agents • Hypomagnesemia
Causes of Hypercalcemia
Parathyroid gland structure-related
 • Primary hyperparathyroidism
 • Parathyroid adenoma
 • Parathyroid hyperplasia
 • Parathyroid
structure-related • Primary hyperparathyroidism ... Lithium use • Calcium-sensing ... disease • Tertiary hyperparathyroidism ... #Causes #endocrinology ... #diagnosis #differential
Causes of Hypocalcemia by Clinical Cause

Acute illness: pancreatitis, tumor lysis, severe illness - Secondary hyperparathyroidism from
severe illness - Secondary ... hyperparathyroidism ... low circulating calcium ... #Causes #Differential ... #Diagnosis #Endocrinology
Hyperuricemia - Differential Diagnosis Algorithm
Primary - Over-production
     • Increased turnover of nucleotides
Primary
Hyperuricemia - Differential ... Diagnosis Algorithm ... Endocrine • Hyperparathyroidism ... Sarcoidosis • Hypercalcemia ... #endocrinology