Milk-alkali syndrome differential diagnosis: Difference between revisions
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__NOTOC__ | __NOTOC__ | ||
{{Milk-alkali syndrome}} | {{Milk-alkali syndrome}} | ||
Milk-alkali syndrome must be differentiated from other causes of hypercalcaemia | |||
{| | |||
! colspan="9" style="background: #4479BA; text-align: center;" |{{fontcolor|#FFF|Differential diagnosis of hyperparathyroidism on the basis of hypercalcemia}} | |||
|- | |||
! colspan="2" rowspan="2" style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Disorder}} | |||
! rowspan="2" style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Mechanism of hypercalcemia}} | |||
! rowspan="2" style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Clinical features}} | |||
! colspan="4" style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Laboratory findings}} | |||
! rowspan="2" style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Imaging & diagnostic modalities}} | |||
|- | |||
! style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|PTH}} | |||
! style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Calcium}} | |||
! style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Phosphate}} | |||
! style="background: #7d7d7d; text-align: center;" |{{fontcolor|#FFF|Other findings}} | |||
|- | |||
! rowspan="3" style="background: #DCDCDC; text-align: center;" |'''Hyperparathyroidism''' | |||
! style="background: #DCDCDC; text-align: center;" |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;" | | |||
* Usually asymptomatic | |||
* [[Hypercalcemia]] detected on routine biochemical panel | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↓/Normal | |||
| style="background: #F5F5F5; text-align: center;" |Normal/↑ calcitriol | |||
| rowspan="3" style="background: #F5F5F5;" |Findings of bone resorption: | |||
* [[X-ray]] | |||
* [[Dual energy X-ray absorptiometry]] ([[DXA]]) | |||
Preoperative localization of hyperfunctioning [[parathyroid gland]]: | |||
* Non-Invasive | |||
** [[Tc-99m sestamibi scintigraphy]] | |||
** Neck [[ultrasound]] | |||
** 4D-CT | |||
** [[SPECT]](P-SPECT) | |||
** [[Positron emission tomography|PET]] | |||
** [[MRI]] | |||
* Invasive: | |||
** Super sensitive [[venous]] sampling | |||
** Selective [[arteriography]] | |||
** [[Angiogram|Angiography]] | |||
Predicting post-operative success: | |||
* [[Intraoperative parathyroid hormone]] monitoring | |||
|- | |||
! style="background: #DCDCDC; text-align: center;" |Secondary hyperparathyroidism | |||
| 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;" | | |||
* May present with history of: | |||
** [[Chronic renal failure]] | |||
** [[Vitamin D deficiency]] | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↓/Normal | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
|- | |||
! 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;" | | |||
* Usually present with history of [[kidney transplant]] | |||
* Usually [[hyperplasia]] of all four [[parathyroid glands]] | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
|- | |||
! colspan="2" style="background: #DCDCDC; text-align: center;" |[[Familial hypocalciuric hypercalcemia]] | |||
| style="background: #F5F5F5;" |This is a [[genetic disorder]] caused my [[mutation]] in [[calcium-sensing receptor]] gene. | |||
| style="background: #F5F5F5;" | | |||
* A benign condition | |||
* Does not require treatment | |||
| style="background: #F5F5F5; text-align: center;" |Normal/↑ | |||
| style="background: #F5F5F5; text-align: center;" |Normal/↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5;" | | |||
* Urinary calcium/creatinine clearance ratio | |||
|- | |||
! rowspan="4" style="background: #DCDCDC; text-align: center;" |'''Malignancy'''<ref name="pmid26713296">{{cite journal |vauthors=Mirrakhimov AE |title=Hypercalcemia of Malignancy: An Update on Pathogenesis and Management |journal=N Am J Med Sci |volume=7 |issue=11 |pages=483–93 |year=2015 |pmid=26713296 |pmc=4683803 |doi=10.4103/1947-2714.170600 |url=}}</ref> | |||
! style="background: #DCDCDC; text-align: center;" |Humoral hypercalcemia of malignancy<ref name="pmid1346019">{{cite journal |vauthors=Ratcliffe WA, Hutchesson AC, Bundred NJ, Ratcliffe JG |title=Role of assays for parathyroid-hormone-related protein in investigation of hypercalcaemia |journal=Lancet |volume=339 |issue=8786 |pages=164–7 |year=1992 |pmid=1346019 |doi=10.1016/0140-6736(92)90220-W |url=}}</ref><ref name="pmid7962324">{{cite journal |vauthors=Ikeda K, Ohno H, Hane M, Yokoi H, Okada M, Honma T, Yamada A, Tatsumi Y, Tanaka T, Saitoh T |title=Development of a sensitive two-site immunoradiometric assay for parathyroid hormone-related peptide: evidence for elevated levels in plasma from patients with adult T-cell leukemia/lymphoma and B-cell lymphoma |journal=J. Clin. Endocrinol. Metab. |volume=79 |issue=5 |pages=1322–7 |year=1994 |pmid=7962324 |doi=10.1210/jcem.79.5.7962324 |url=}}</ref><ref name="pmid12679445">{{cite journal |vauthors=Horwitz MJ, Tedesco MB, Sereika SM, Hollis BW, Garcia-Ocaña A, Stewart AF |title=Direct comparison of sustained infusion of human parathyroid hormone-related protein-(1-36) [hPTHrP-(1-36)] versus hPTH-(1-34) on serum calcium, plasma 1,25-dihydroxyvitamin D concentrations, and fractional calcium excretion in healthy human volunteers |journal=J. Clin. Endocrinol. Metab. |volume=88 |issue=4 |pages=1603–9 |year=2003 |pmid=12679445 |doi=10.1210/jc.2002-020773 |url=}}</ref> | |||
| style="background: #F5F5F5;" |[[Tumor]] cells secretes [[parathyroid hormone-related protein]] ([[PTHrP]]) which has similar action as [[parathyroid hormone]]. | |||
| style="background: #F5F5F5;" | | |||
* Most common cause of [[malignancy]] related [[hypercalcemia]] | |||
* Usually present with [[solid tumors]] | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↓/Normal | |||
| style="background: #F5F5F5; text-align: center;" |↑ [[PTHrP]] | |||
Normal/↑ calcitriol | |||
| style="background: #F5F5F5;" | | |||
* [[Chest X-rays|Chest X-ray]] | |||
* [[CT scan]] | |||
* [[MRI]] | |||
|- | |||
! 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;" | | |||
* Commonly present in [[multiple myeloma]] and [[breast cancer]] | |||
| style="background: #F5F5F5; text-align: center;" |↓ | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5;" | | |||
* [[DXA]] | |||
* [[X-ray]] | |||
* [[Mammography]] | |||
* [[Ultrasound]] | |||
* [[ESR]] | |||
* [[Serum protein electrophoresis]] | |||
|- | |||
! 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;" | | |||
* Commonly present in [[lymphomas]] and in some [[Ovarian cancer|ovarian germ cell tumors]] | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ [[Calcitriol]] | |||
| style="background: #F5F5F5;" | | |||
* [[CT scan]] | |||
* [[MRI]] | |||
|- | |||
! style="background: #DCDCDC; text-align: center;" |Ectopic parathyroid hormone<ref name="pmid16263810">{{cite journal |vauthors=VanHouten JN, Yu N, Rimm D, Dotto J, Arnold A, Wysolmerski JJ, Udelsman R |title=Hypercalcemia of malignancy due to ectopic transactivation of the parathyroid hormone gene |journal=J. Clin. Endocrinol. Metab. |volume=91 |issue=2 |pages=580–3 |year=2006 |pmid=16263810 |doi=10.1210/jc.2005-2095 |url=}}</ref> | |||
| style="background: #F5F5F5;" |Some tumors leads to [[Ectopia|ectopic]] production of [[parathyroid hormone]]. | |||
| style="background: #F5F5F5;" | | |||
* In rare instances, [[small cell carcinoma of lung]] may produce [[hypercalcemia]] by this process | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↓/Normal | |||
| style="background: #F5F5F5; text-align: center;" |Normal/↑ [[calcitriol]] | |||
| style="background: #F5F5F5;" | | |||
* [[Chest X-rays|Chest X-ray]] | |||
* [[CT scan]] | |||
* [[MRI]] | |||
|- | |||
! rowspan="2" style="background: #DCDCDC; text-align: center;" |'''Medication induced''' | |||
! style="background: #DCDCDC; text-align: center;" |Lithium<ref name="pmid2918061">{{cite journal |vauthors=Mallette LE, Khouri K, Zengotita H, Hollis BW, Malini S |title=Lithium treatment increases intact and midregion parathyroid hormone and parathyroid volume |journal=J. Clin. Endocrinol. Metab. |volume=68 |issue=3 |pages=654–60 |year=1989 |pmid=2918061 |doi=10.1210/jcem-68-3-654 |url=}}</ref> | |||
| 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;" | | |||
* History of [[mood disorder]] | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5;" | | |||
* [[Lithium]] levels | |||
|- | |||
! style="background: #DCDCDC; text-align: center;" |Thiazide diuretics | |||
| style="background: #F5F5F5;" |[[Thiazide diuretics]] lowers [[urinary]] [[calcium]] [[excretion]] and causes [[hypercalcemia]]. | |||
| style="background: #F5F5F5;" | | |||
* History of [[cardiac]] disorder | |||
* Rarely causes [[hypercalcemia]] | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5;" | -- | |||
|- | |||
! rowspan="2" style="background: #DCDCDC; text-align: center;" |'''Nutritional''' | |||
! style="background: #DCDCDC; text-align: center;" |Milk-alkali syndrome | |||
| style="background: #F5F5F5;" |[[Hypercalcemia]] is be caused by high intake of [[calcium carbonate]]. | |||
| style="background: #F5F5F5;" | | |||
* History of | |||
** High milk intake | |||
** Excess calcium intake for treating: | |||
*** [[Osteoporosis]] | |||
*** [[Dyspepsia]] | |||
* May lead to [[metabolic alkalosis]] and [[renal insufficiency]]. | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5;" | | |||
* [[Renal function tests]] | |||
|- | |||
! 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;" | | |||
* History of: | |||
** Excess intake [[vitamin D]] | |||
** Excess milk fortified with [[vitamin D]]<ref name="pmid1313547">{{cite journal |vauthors=Jacobus CH, Holick MF, Shao Q, Chen TC, Holm IA, Kolodny JM, Fuleihan GE, Seely EW |title=Hypervitaminosis D associated with drinking milk |journal=N. Engl. J. Med. |volume=326 |issue=18 |pages=1173–7 |year=1992 |pmid=1313547 |doi=10.1056/NEJM199204303261801 |url=}}</ref> | |||
** Topical application of vitamin D analogue [[calcipotriol]]<ref name="pmid8120527">{{cite journal |vauthors=Hoeck HC, Laurberg G, Laurberg P |title=Hypercalcaemic crisis after excessive topical use of a vitamin D derivative |journal=J. Intern. Med. |volume=235 |issue=3 |pages=281–2 |year=1994 |pmid=8120527 |doi= |url=}}</ref> | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ [[Vitamin D]] ([[calcidiol]] and/or [[calcitriol]]) | |||
| style="background: #F5F5F5;" | -- | |||
|- | |||
! style="background: #DCDCDC; text-align: center;" |'''Granulomatous disease''' | |||
! style="background: #DCDCDC; text-align: center;" |Sarcoidosis<ref name="pmid9215298">{{cite journal |vauthors=Dusso AS, Kamimura S, Gallieni M, Zhong M, Negrea L, Shapiro S, Slatopolsky E |title=gamma-Interferon-induced resistance to 1,25-(OH)2 D3 in human monocytes and macrophages: a mechanism for the hypercalcemia of various granulomatoses |journal=J. Clin. Endocrinol. Metab. |volume=82 |issue=7 |pages=2222–32 |year=1997 |pmid=9215298 |doi=10.1210/jcem.82.7.4074 |url=}}</ref> | |||
| style="background: #F5F5F5;" |[[Hypercalcemia]] is causes by endogeous production of [[calcitriol]] by disease-activated [[Macrophage|macrophages]]. | |||
| style="background: #F5F5F5;" | | |||
* History of: | |||
** [[Cough]] | |||
** [[Dyspnea]] | |||
** [[Chest pain]] | |||
** [[Tiredness]] or [[weakness]] | |||
** [[Fever]] | |||
** [[Weight loss]] | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ | |||
| style="background: #F5F5F5; text-align: center;" | -- | |||
| style="background: #F5F5F5; text-align: center;" |↑ [[Calcitriol]] | |||
↑ [[ACE]] levels | |||
| style="background: #F5F5F5;" | | |||
* [[Chest X-ray]] | |||
* [[Biopsy]] | |||
|} | |||
==References== | ==References== | ||
{{reflist|2}} | {{reflist|2}} |
Revision as of 02:08, 6 October 2017
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Milk-alkali syndrome must be differentiated from other causes of hypercalcaemia
Differential diagnosis of hyperparathyroidism on the basis of hypercalcemia | ||||||||
---|---|---|---|---|---|---|---|---|
Disorder | Mechanism of hypercalcemia | Clinical features | Laboratory findings | Imaging & diagnostic modalities | ||||
PTH | Calcium | Phosphate | Other findings | |||||
Hyperparathyroidism | 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 | 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[1] | Humoral hypercalcemia of malignancy[2][3][4] | 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[5] | Some tumors leads to ectopic production of parathyroid hormone. |
|
↑ | ↑ | ↓/Normal | Normal/↑ calcitriol | ||
Medication induced | Lithium[6] | 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. |
|
-- | ↑ | -- | -- | |
Vitamin D toxicity | Excess vitamin D causes increased absorption of calcium from intestine causing hypercalcemia. |
|
-- | ↑ | -- | ↑ Vitamin D (calcidiol and/or calcitriol) | -- | |
Granulomatous disease | Sarcoidosis[9] | Hypercalcemia is causes by endogeous production of calcitriol by disease-activated macrophages. |
|
-- | ↑ | -- | ↑ Calcitriol
↑ ACE levels |
References
- ↑ Mirrakhimov AE (2015). "Hypercalcemia of Malignancy: An Update on Pathogenesis and Management". N Am J Med Sci. 7 (11): 483–93. doi:10.4103/1947-2714.170600. PMC 4683803. PMID 26713296.
- ↑ Ratcliffe WA, Hutchesson AC, Bundred NJ, Ratcliffe JG (1992). "Role of assays for parathyroid-hormone-related protein in investigation of hypercalcaemia". Lancet. 339 (8786): 164–7. doi:10.1016/0140-6736(92)90220-W. PMID 1346019.
- ↑ Ikeda K, Ohno H, Hane M, Yokoi H, Okada M, Honma T, Yamada A, Tatsumi Y, Tanaka T, Saitoh T (1994). "Development of a sensitive two-site immunoradiometric assay for parathyroid hormone-related peptide: evidence for elevated levels in plasma from patients with adult T-cell leukemia/lymphoma and B-cell lymphoma". J. Clin. Endocrinol. Metab. 79 (5): 1322–7. doi:10.1210/jcem.79.5.7962324. PMID 7962324.
- ↑ Horwitz MJ, Tedesco MB, Sereika SM, Hollis BW, Garcia-Ocaña A, Stewart AF (2003). "Direct comparison of sustained infusion of human parathyroid hormone-related protein-(1-36) [hPTHrP-(1-36)] versus hPTH-(1-34) on serum calcium, plasma 1,25-dihydroxyvitamin D concentrations, and fractional calcium excretion in healthy human volunteers". J. Clin. Endocrinol. Metab. 88 (4): 1603–9. doi:10.1210/jc.2002-020773. PMID 12679445.
- ↑ VanHouten JN, Yu N, Rimm D, Dotto J, Arnold A, Wysolmerski JJ, Udelsman R (2006). "Hypercalcemia of malignancy due to ectopic transactivation of the parathyroid hormone gene". J. Clin. Endocrinol. Metab. 91 (2): 580–3. doi:10.1210/jc.2005-2095. PMID 16263810.
- ↑ Mallette LE, Khouri K, Zengotita H, Hollis BW, Malini S (1989). "Lithium treatment increases intact and midregion parathyroid hormone and parathyroid volume". J. Clin. Endocrinol. Metab. 68 (3): 654–60. doi:10.1210/jcem-68-3-654. PMID 2918061.
- ↑ Jacobus CH, Holick MF, Shao Q, Chen TC, Holm IA, Kolodny JM, Fuleihan GE, Seely EW (1992). "Hypervitaminosis D associated with drinking milk". N. Engl. J. Med. 326 (18): 1173–7. doi:10.1056/NEJM199204303261801. PMID 1313547.
- ↑ Hoeck HC, Laurberg G, Laurberg P (1994). "Hypercalcaemic crisis after excessive topical use of a vitamin D derivative". J. Intern. Med. 235 (3): 281–2. PMID 8120527.
- ↑ Dusso AS, Kamimura S, Gallieni M, Zhong M, Negrea L, Shapiro S, Slatopolsky E (1997). "gamma-Interferon-induced resistance to 1,25-(OH)2 D3 in human monocytes and macrophages: a mechanism for the hypercalcemia of various granulomatoses". J. Clin. Endocrinol. Metab. 82 (7): 2222–32. doi:10.1210/jcem.82.7.4074. PMID 9215298.