Parathyroid adenoma differential diagnosis: Difference between revisions
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==Overview== | ==Overview== | ||
Majority of parathyroid adenoma are asymptomatic. However, most common presentation of a parathyroid adenoma is [[hypercalcemia]]. So, parathyroid adenoma shall be differentiated from other conditions presenting pimarily as [[hypercalcemia]]. | |||
==Differential Diagnosis== | ==Differential Diagnosis== | ||
* Majority of parathyroid adenoma are asymptomatic. | |||
* However, most common presentation of a parathyroid adenoma is [[hypercalcemia]]. | |||
* So, parathyroid adenoma shall be differentiated from other conditions presenting primarily as [[hypercalcemia]].<ref name="MarcocciCetani2011">{{cite journal|last1=Marcocci|first1=Claudio|last2=Cetani|first2=Filomena|title=Primary Hyperparathyroidism|journal=New England Journal of Medicine|volume=365|issue=25|year=2011|pages=2389–2397|issn=0028-4793|doi=10.1056/NEJMcp1106636}}</ref> | |||
* Common conditions presenting as hypercalcemia include: | |||
** Parathyroid adenoma ([[primary hyperparathyroidism]]) | |||
** [[Secondary hyperthyroidism]] (long term) | |||
** Tertiary hyperparathyroidism | |||
** [[Familial hypocalceuric hypercalcemia]] | |||
** Hypercalcemia due to malignancy | |||
*** Humoral hypercalcemia of malignancy | |||
*** Osteolytic tumors | |||
*** Production of calcitriol | |||
*** Ectopic parathyroid gland | |||
** Medication induced | |||
*** [[Lithium]] | |||
*** [[Thiazide diuretics]] | |||
** Nutritional | |||
*** Milk alkali syndrome | |||
*** Vitamin D toxicity | |||
** Granulomatous disease | |||
*** [[Sarcoidosis]] | |||
{| | {| | ||
! colspan="9" style="background: #4479BA; text-align: center;" |{{fontcolor|#FFF|Differential diagnosis of parathyroid adenoma on the basis of hypercalcemia}} | ! colspan="9" style="background: #4479BA; text-align: center;" |{{fontcolor|#FFF|Differential diagnosis of parathyroid adenoma on the basis of hypercalcemia}} | ||
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! style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Other findings}} | ! style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Other findings}} | ||
|- | |- | ||
! colspan="2" style="background: #DCDCDC; text-align: center;" |Primary hyperparathyroidism | ! colspan="2" style="background: #DCDCDC; text-align: center;" |Parathyroid adenoma ([[Primary hyperparathyroidism]]) | ||
| style="background: #F5F5F5;" |Increase in [[secretion]] of [[parathyroid hormone]] ([[PTH]]) from a primary process in [[parathyroid gland]]. [[Parathyroid hormone]] causes increase in [[serum]] [[calcium]]. | | style="background: #F5F5F5;" |Increase in [[secretion]] of [[parathyroid hormone]] ([[PTH]]) from a primary process in [[parathyroid gland]]. [[Parathyroid hormone]] causes increase in [[serum]] [[calcium]]. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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* [[Intraoperative parathyroid hormone]] monitoring | * [[Intraoperative parathyroid hormone]] monitoring | ||
|- | |- | ||
! colspan="2" style="background: #DCDCDC; text-align: center;" |Secondary hyperparathyroidism | ! colspan="2" style="background: #DCDCDC; text-align: center;" |[[Secondary hyperparathyroidism]] (long term) | ||
| style="background: #F5F5F5;" |Increase in [[secretion]] of [[parathyroid hormone]] ([[PTH]]) from a secondary process. [[Parathyroid hormone]] causes increase in [[serum]] [[calcium]] after long periods. | | style="background: #F5F5F5;" |Increase in [[secretion]] of [[parathyroid hormone]] ([[PTH]]) from a secondary process. [[Parathyroid hormone]] causes increase in [[serum]] [[calcium]] after long periods. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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| style="background: #F5F5F5; text-align: center;" | -- | | style="background: #F5F5F5; text-align: center;" | -- | ||
|- | |- | ||
! colspan="2" style="background: #DCDCDC; text-align: center;" |Tertiary hyperparathyroidism | ! colspan="2" style="background: #DCDCDC; text-align: center;" |[[Tertiary hyperparathyroidism]] | ||
| style="background: #F5F5F5;" |Continuous elevation of [[parathyroid hormone]] (PTH) even after successful treatment of the secondary cause of elevated [[parathyroid hormone]]. [[Parathyroid hormone]] causes increase in serum calcium. | | style="background: #F5F5F5;" |Continuous elevation of [[parathyroid hormone]] (PTH) even after successful treatment of the secondary cause of elevated [[parathyroid hormone]]. [[Parathyroid hormone]] causes increase in serum calcium. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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* Urinary calcium/creatinine clearance ratio | * Urinary calcium/creatinine clearance ratio | ||
|- | |- | ||
! rowspan="4" style="background: #DCDCDC; text-align: center;" |'''Malignancy''' | ! rowspan="4" style="background: #DCDCDC; text-align: center;" |'''Malignancy''' | ||
! style="background: #DCDCDC; text-align: center;" |Humoral hypercalcemia of malignancy | ! style="background: #DCDCDC; text-align: center;" |Humoral hypercalcemia of malignancy | ||
| style="background: #F5F5F5;" |[[Tumor]] cells secretes [[parathyroid hormone-related protein]] ([[PTHrP]]) which has similar action as [[parathyroid hormone]]. | | style="background: #F5F5F5;" |[[Tumor]] cells secretes [[parathyroid hormone-related protein]] ([[PTHrP]]) which has similar action as [[parathyroid hormone]]. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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* [[MRI]] | * [[MRI]] | ||
|- | |- | ||
! style="background: #DCDCDC; text-align: center;" |Osteolytic tumors | ! style="background: #DCDCDC; text-align: center;" |Osteolytic tumors | ||
| style="background: #F5F5F5;" |[[Multiple myeloma]] produces [[osteolysis]] of [[bones]] causing [[hypercalcemia]]. [[Osteolytic metasteses]] can cause [[bone resorption]] causing [[hypercalcemia]]. | | style="background: #F5F5F5;" |[[Multiple myeloma]] produces [[osteolysis]] of [[bones]] causing [[hypercalcemia]]. [[Osteolytic metasteses]] can cause [[bone resorption]] causing [[hypercalcemia]]. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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* [[Serum protein electrophoresis]] | * [[Serum protein electrophoresis]] | ||
|- | |- | ||
! style="background: #DCDCDC; text-align: center;" |Production of calcitirol | ! style="background: #DCDCDC; text-align: center;" |Production of calcitirol | ||
| style="background: #F5F5F5;" |Some tumors has ectopic activity of 1-alpha-hydroxylase leading to increased production of [[calcitriol]]. [[Calcitriol]] is active form of [[vitamin D]] and causes [[hypercalcemia]]. | | style="background: #F5F5F5;" |Some tumors has ectopic activity of 1-alpha-hydroxylase leading to increased production of [[calcitriol]]. [[Calcitriol]] is active form of [[vitamin D]] and causes [[hypercalcemia]]. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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* [[MRI]] | * [[MRI]] | ||
|- | |- | ||
! style="background: #DCDCDC; text-align: center;" |Ectopic parathyroid hormone | ! style="background: #DCDCDC; text-align: center;" |Ectopic parathyroid hormone | ||
| style="background: #F5F5F5;" |Some tumors leads to [[Ectopia|ectopic]] production of [[parathyroid hormone]]. | | style="background: #F5F5F5;" |Some tumors leads to [[Ectopia|ectopic]] production of [[parathyroid hormone]]. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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|- | |- | ||
! rowspan="2" style="background: #DCDCDC; text-align: center;" |'''Medication induced''' | ! rowspan="2" style="background: #DCDCDC; text-align: center;" |'''Medication induced''' | ||
! style="background: #DCDCDC; text-align: center;" |Lithium | ! style="background: #DCDCDC; text-align: center;" |Lithium | ||
| style="background: #F5F5F5;" |[[Lithium]] lowers [[Urinary System|urinary]] [[calcium]] and causes [[hypercalcemia]]. [[Lithium]] has been reported to cause an increase in [[parathyroid hormone]] and enlargement if [[parathyroid gland]] after weeks to months of therapy. | | style="background: #F5F5F5;" |[[Lithium]] lowers [[Urinary System|urinary]] [[calcium]] and causes [[hypercalcemia]]. [[Lithium]] has been reported to cause an increase in [[parathyroid hormone]] and enlargement if [[parathyroid gland]] after weeks to months of therapy. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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* [[Lithium]] levels | * [[Lithium]] levels | ||
|- | |- | ||
! style="background: #DCDCDC; text-align: center;" |Thiazide diuretics | ! style="background: #DCDCDC; text-align: center;" |Thiazide diuretics | ||
| style="background: #F5F5F5;" |[[Thiazide diuretics]] lowers [[urinary]] [[calcium]] [[excretion]] and causes [[hypercalcemia]]. | | style="background: #F5F5F5;" |[[Thiazide diuretics]] lowers [[urinary]] [[calcium]] [[excretion]] and causes [[hypercalcemia]]. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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* [[Renal function tests]] | * [[Renal function tests]] | ||
|- | |- | ||
! style="background: #DCDCDC; text-align: center;" |Vitamin D toxicity | ! style="background: #DCDCDC; text-align: center;" |Vitamin D toxicity | ||
| style="background: #F5F5F5;" |Excess [[vitamin D]] causes increased [[absorption]] of [[calcium]] from [[intestine]] causing [[hypercalcemia]]. | | style="background: #F5F5F5;" |Excess [[vitamin D]] causes increased [[absorption]] of [[calcium]] from [[intestine]] causing [[hypercalcemia]]. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
* History of: | * History of: | ||
** Excess intake [[vitamin D]] | ** Excess intake [[vitamin D]] | ||
** Excess milk fortified with [[vitamin D]] | ** Excess milk fortified with [[vitamin D]] | ||
** Topical application of vitamin D analogue [[calcipotriol]] | ** Topical application of vitamin D analogue [[calcipotriol]] | ||
| style="background: #F5F5F5; text-align: center;" | -- | | style="background: #F5F5F5; text-align: center;" | -- | ||
| style="background: #F5F5F5; text-align: center;" |↑ | | style="background: #F5F5F5; text-align: center;" |↑ | ||
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|- | |- | ||
! style="background: #DCDCDC; text-align: center;" |'''Granulomatous disease''' | ! style="background: #DCDCDC; text-align: center;" |'''Granulomatous disease''' | ||
! style="background: #DCDCDC; text-align: center;" |Sarcoidosis | ! style="background: #DCDCDC; text-align: center;" |Sarcoidosis | ||
| style="background: #F5F5F5;" |[[Hypercalcemia]] is causes by endogeous production of [[calcitriol]] by disease-activated [[Macrophage|macrophages]]. | | style="background: #F5F5F5;" |[[Hypercalcemia]] is causes by endogeous production of [[calcitriol]] by disease-activated [[Macrophage|macrophages]]. | ||
| style="background: #F5F5F5;" | | | style="background: #F5F5F5;" | | ||
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==References== | ==References== | ||
<references /> |
Revision as of 14:03, 29 May 2019
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Anmol Pitliya, M.B.B.S. M.D.[2]
Overview
Majority of parathyroid adenoma are asymptomatic. However, most common presentation of a parathyroid adenoma is hypercalcemia. So, parathyroid adenoma shall be differentiated from other conditions presenting pimarily as hypercalcemia.
Differential Diagnosis
- Majority of parathyroid adenoma are asymptomatic.
- However, most common presentation of a parathyroid adenoma is hypercalcemia.
- So, parathyroid adenoma shall be differentiated from other conditions presenting primarily as hypercalcemia.[1]
- Common conditions presenting as hypercalcemia include:
- Parathyroid adenoma (primary hyperparathyroidism)
- Secondary hyperthyroidism (long term)
- Tertiary hyperparathyroidism
- Familial hypocalceuric hypercalcemia
- Hypercalcemia due to malignancy
- Humoral hypercalcemia of malignancy
- Osteolytic tumors
- Production of calcitriol
- Ectopic parathyroid gland
- Medication induced
- Nutritional
- Milk alkali syndrome
- Vitamin D toxicity
- Granulomatous disease
Differential diagnosis of parathyroid adenoma on the basis of hypercalcemia | ||||||||
---|---|---|---|---|---|---|---|---|
Disorder | Mechanism of hypercalcemia | Clinical features | Laboratory findings | Imaging & diagnostic modalities | ||||
PTH | Calcium | Phosphate | Other findings | |||||
Parathyroid adenoma (Primary hyperparathyroidism) | Increase in secretion of parathyroid hormone (PTH) from a primary process in parathyroid gland. Parathyroid hormone causes increase in serum calcium. |
|
↑ | ↑ | ↓/Normal | Normal/↑ calcitriol | Findings of bone resorption:
Preoperative localization of hyperfunctioning parathyroid gland:
Predicting post-operative success:
| |
Secondary hyperparathyroidism (long term) | Increase in secretion of parathyroid hormone (PTH) from a secondary process. Parathyroid hormone causes increase in serum calcium after long periods. |
|
↑ | ↓/Normal | ↑ | -- | ||
Tertiary hyperparathyroidism | Continuous elevation of parathyroid hormone (PTH) even after successful treatment of the secondary cause of elevated parathyroid hormone. Parathyroid hormone causes increase in serum calcium. |
|
↑ | ↑ | ↑ | -- | ||
Familial hypocalciuric hypercalcemia | This is a genetic disorder caused my mutation in calcium-sensing receptor gene. |
|
Normal/↑ | Normal/↑ | -- | -- |
| |
Malignancy | Humoral hypercalcemia of malignancy | Tumor cells secretes parathyroid hormone-related protein (PTHrP) which has similar action as parathyroid hormone. |
|
-- | ↑ | ↓/Normal | ↑ PTHrP
Normal/↑ calcitriol |
|
Osteolytic tumors | Multiple myeloma produces osteolysis of bones causing hypercalcemia. Osteolytic metasteses can cause bone resorption causing hypercalcemia. |
|
↓ | ↑ | -- | -- | ||
Production of calcitirol | Some tumors has ectopic activity of 1-alpha-hydroxylase leading to increased production of calcitriol. Calcitriol is active form of vitamin D and causes hypercalcemia. |
|
-- | ↑ | -- | ↑ Calcitriol | ||
Ectopic parathyroid hormone | Some tumors leads to ectopic production of parathyroid hormone. |
|
↑ | ↑ | ↓/Normal | Normal/↑ calcitriol | ||
Medication induced | Lithium | Lithium lowers urinary calcium and causes hypercalcemia. Lithium has been reported to cause an increase in parathyroid hormone and enlargement if parathyroid gland after weeks to months of therapy. |
|
↑ | ↑ | -- | -- |
|
Thiazide diuretics | Thiazide diuretics lowers urinary calcium excretion and causes hypercalcemia. |
|
-- | ↑ | -- | -- | -- | |
Nutritional | Milk-alkali syndrome | Hypercalcemia is be caused by high intake of calcium carbonate. |
|
-- | ↑ | -- | ↓ calcitriol | |
Vitamin D toxicity | Excess vitamin D causes increased absorption of calcium from intestine causing hypercalcemia. |
|
-- | ↑ | -- | ↑ Vitamin D (calcidiol and/or calcitriol) | -- | |
Granulomatous disease | Sarcoidosis | Hypercalcemia is causes by endogeous production of calcitriol by disease-activated macrophages. |
|
-- | ↑ | -- | ↑ Calcitriol
↑ ACE levels |
References
- ↑ Marcocci, Claudio; Cetani, Filomena (2011). "Primary Hyperparathyroidism". New England Journal of Medicine. 365 (25): 2389–2397. doi:10.1056/NEJMcp1106636. ISSN 0028-4793.