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ORIGINAL ARTICLE
Year : 2018  |  Volume : 6  |  Issue : 2  |  Page : 95-99

Clinical profile and outcome of parathyroid adenoma-associated pancreatitis


1 Department of Medicine, Asian Institute of Gastroenterology, Hyderabad, Telangana, India
2 Department of Medical Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, Telangana, India
3 Department of Surgical Gastroenterology, Asian Institute of Gastroenterology, Hyderabad, Telangana, India

Date of Web Publication16-Apr-2018

Correspondence Address:
Mohsin Aslam
Department of Medicine, Asian Institute of Gastroenterology, 6-3-661, Somajiguda, Hyderabad - 500 082, Telangana
India
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DOI: 10.4103/sjmms.sjmms_80_17

PMID: 30787828

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  Abstract 


Background: Primary hyperparathyroidism due to parathyroid adenoma presenting with pancreatitis as the initial manifestation is rare. The causal relationship between pancreatitis and primary hyperparathyroidism is debatable.
Objective: To study the clinical and biochemical profile of patients with parathyroid adenoma-associated pancreatitis as well as the outcome following parathyroidectomy.
Methods: The authors retrospectively studied the clinical and biochemical parameters of patients with acute, recurrent acute and chronic pancreatitis who underwent parathyroidectomy for parathyroid adenoma at Asian Institute of Gastroenterology, Hyderabad, India, between April 2010 and June 2016.
Results: Of the total 3962 patients who presented with recurrent acute and chronic pancreatitis, 77 (1.94%) patients had parathyroid adenoma-associated pancreatitis and were included in this study for further analysis. Of these, 41 (53.2%) had recurrent acute pancreatitis and 36 (46.8%) had chronic pancreatitis. Serum calcium (12.4 ± 1.7 mg/dl) and parathyroid hormone levels (367 ± 286.4 pg/ml) were found to be elevated. Left inferior parathyroid adenoma (37.7%) was the most common finding on neck imaging. Patients with chronic pancreatitis had a longer disease duration (3.8 ± 5 years) and more pain episodes (10.7 ± 10.2) than those with recurrent acute pancreatitis (0.62 ± 0.7 years and 2.6 ± 2.7, respectively) (P = 0.0001). In all the patients, following parathyroidectomy, there was a significant decrease in serum calcium (12.4 ± 1.7 mg/dl vs. 9.7 ± 1.9 mg/dl; P = 0.0001) and serum parathyroid hormone levels (367 ± 286.4 pg/ml vs. 116.4 ± 47.1 pg/ml; P = 0.0001) as well as there was a reduction in the number of episodes and severity of pain.
Conclusions: Estimating serum calcium after an episode of unexplained pancreatitis is important and can help minimize delay in diagnosing primary hyperparathyroidism, and possibly prevent the progression of pancreatitis. Parathyroidectomy improves the clinical outcome of primary hyperparathyroidism and prevents further attacks of pancreatitis.

Keywords: Acute pancreatitis, chronic pancreatitis, hypercalcemia, parathyroid adenoma, parathyroidectomy, primary hyperparathyroidism


How to cite this article:
Aslam M, Talukdar R, Jagtap N, Rao G V, Pradeep R, Rao U, Reddy D N. Clinical profile and outcome of parathyroid adenoma-associated pancreatitis. Saudi J Med Med Sci 2018;6:95-9

How to cite this URL:
Aslam M, Talukdar R, Jagtap N, Rao G V, Pradeep R, Rao U, Reddy D N. Clinical profile and outcome of parathyroid adenoma-associated pancreatitis. Saudi J Med Med Sci [serial online] 2018 [cited 2019 May 25];6:95-9. Available from: http://www.sjmms.net/text.asp?2018/6/2/95/230181




  Introduction Top


Primary hyperparathyroidism (PHPT) is characterized by excessive secretion of the parathyroid hormone (PTH) and is the most common cause of hypercalcemia in ambulatory patients. Parathyroid adenoma is the underlying cause in 85% of patients with PHPT; however, parathyroid malignancies are rare, occurring in <0.5% of all cases.[1] About 75%–80% of PHPT patients are asymptomatic. Its clinical manifestations are secondary to hypercalcemia and include renal calculi, overt bone disease, nonspecific gastrointestinal symptoms as well as cardiovascular and neuromuscular dysfunction.[2],[3]

The prevalence of pancreatitis among patients with PHPT is between 1.5% and 13%.[4],[5],[6],[7],[8],[9],[10],[11] Hypercalcemia, a common complication of PHPT, can also lead to pancreatitis.[12] It has been shown that serum calcium levels are higher among PHPT patients with pancreatitis compared with PHPT patients without pancreatitis, suggesting that hypercalcemia plays a role in pancreatitis.[13] Further, although the molecular mechanism of pancreatitis secondary to hypercalcemia has not yet been clearly explained, interestingly, it has been shown that patients with PHPT as well as those with elevated PTH but without hypercalcemia are not at risk for pancreatitis.[6]

Pancreatic disease in PHPT can present as acute pancreatitis (AP); recurrent AP (RAP) with no evidence of chronic pancreatitis (CP); CP with no calcification; chronic calcific pancreatitis; or PHPT complicated by AP in the postoperative period.[9] Recurrent abdominal pain is the most common manifestation of the life-threatening AP with PHPT. CP with PHPT is also characterized by recurrent abdominal pain along with exocrine insufficiency and endocrine dysfunction.[14],[15] There is significant morbidity and mortality associated with pancreatitis. However, treating the underlying cause of hypercalcemia and surgical management of parathyroid adenoma can help in the management of PHPT-associated pancreatitis.[13]

Considering the abovementioned background, this study evaluated the clinical and biochemical profiles of patients with pancreatitis, hypercalcemia and parathyroid adenoma before and after parathyroidectomy. The results of this study would help determine the effectiveness of parathyroidectomy in improving parathyroid adenoma-associated pancreatitis.


  Methods Top


This retrospective study included patients who presented with AP, RAP or CP and were subsequently found to have parathyroid adenoma, for which they underwent parathyroidectomy at Asian Institute of Gastroenterology, Hyderabad, India, between April 2010 and June 2016. Patients with pancreatitis due to other causes such as alcohol, gallstones, hypertriglyceridemia and medications were excluded from the study.

Diagnosis of AP was based on any 2 of the following 3 criteria:[16] (1) abdominal pain (acute onset of a persistent, severe, epigastric pain, often radiating to the back); (2) serum lipase activity and/or serum amylase levels at least three times greater than the upper limit of normal; (3) characteristic findings of AP on imaging (contrast-enhanced computed tomography, magnetic resonance imaging or transabdominal ultrasonography).

The occurrence of two or more documented episodes of AP without any pain in the interim period and without any features of CP was considered as RAP. CP was diagnosed when imaging showed dilated pancreatic duct, pancreatic ductal calculi, atrophy of pancreas, irregular gland margins and/or changes in the pancreatic parenchymal echotexture.

PHPT was diagnosed by an elevated serum PTH with simultaneously elevated serum calcium. Serum calcium assay was performed with Arsenazo III using a fully automated biochemistry analyzer (EM 360, Transasia Biomedicals Ltd., Mumbai, Maharashtra, India), as described previously in the literature.[17] Serum 25-OH vitamin D and PTH levels were determined using the chemiluminescence assay. Parathyroid adenoma was confirmed with a technetium (99m Tc) sestamibi scan.[18]

All statistical analyses were conducted using SPSS version 20 (SPSS Inc., Chicago, IL, USA). Categorical variables were expressed as proportions, and continuous variables as mean (95% confidence interval). Student's t-test was used to compare patient characteristics, and a two-tailed P < 0.05 was considered statistically significant.

Ethical approval for this study (AIG/IEC28/04-2017-05) was provided by the Institutional Ethical Committee of Asian Institute of Gastroenterology, Hyderabad, India, on April 05, 2017.


  Results Top


A total of 3962 patients presented with RAP or CP between April 2010 and June 2016. Of these, 77 (1.94%) patients had hypercalcemia and were found to have parathyroid adenoma on evaluation for the etiology of pancreatitis, and thus were included for further analysis. Of these 77 patients, 47 (61%) were males, and the mean age was 36.3 ± 16 years. Seventeen (22.1%) patients had hypertension, 12 (15.6%) type 2 diabetes mellitus and 22 (28.6%) renal calculi, which was an incidental finding. In all these patients, abdominal pain was the presenting complaint.

Forty-one (53.2%) patients presented with RAP, while 36 (46.8%) patients had developed CP. None of the patients had features of musculoskeletal involvement such as bone and muscle pains, bone swelling or pathological fractures. Expectedly, the mean duration of the disease was significantly longer among those with CP (3.8 ± 5 years) (range = 0.3–25 years; median = 2 years) than those with RAP (0.62 ± 0.7 years) (range = 0.1–3 years; median = 0.3) (P = 0.0001). Similarly, the number of pain episodes was significantly lesser in patients with RAP (2.6 ± 2.7) (range 1–15 episodes; median = 2 episodes) than those with CP (10.7 ± 10.2) (range 1–40 episodes; median = 6 episodes) (P = 0.0001) [Table 1].
Table 1: Comparison between patients with recurrent acute pancreatitis and chronic pancreatitis

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Eleven patients with CP had pancreatic ductal calculi and underwent extracorporeal shock wave lithotripsy and endoscopic retrograde cholangiopancreatography. Number of patients with renal calculi were significantly higher (P = 0.023) among those with CP than those with RAP [Table 1].

Serum calcium (12.4 ± 1.7 mg/dl) and parathyroid levels (367 ± 286.4 pg/ml) were elevated in all patients [Table 2], and there was a positive correlation between serum calcium and PTH levels [Figure 1]. There was no significant difference in the serum calcium levels among patients with RAP and CP (P = 0.80). Similarly, although the serum PTH levels were higher in patients with CP than those with RAP, this difference was not statistically significant (P = 0.3) [Table 1]. Serum 25-OH vitamin D levels were normal in all patients (27.8 ± 9.4 ng/ml), except among those (12 patients) in whom vitamin D deficiency was already implicated as the cause for PHPT.
Table 2: Serum calcium and parathyroid hormone levels before and after parathyroidectomy

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Figure 1: Correlation between serum calcium and serum parathyroid hormone

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There was no significant difference between serum calcium (12.86 ± 1.9 mg/dl vs. 12.48 ± 1.89 mg/dl) and PTH levels (424.1 ± 275.6 pg/ml vs. 425 ± 331.2 pg/ml) among CP patients with and without parenchymal calcification (P = 0.62 and 0.9, respectively). Similarly, there was no significant difference between serum calcium (12.74 ± 1.5 mg/dl vs. 12.5 ± 2 mg/dl) and PTH levels (432.7 ± 385.9 pg/ml vs. 421.5 ± 289.9 pg/ml) in patients with and without pancreatic ductal calculi (P = 0.7 and 0.9, respectively).

On parathyroid imaging, the most common finding was the left inferior parathyroid adenoma (in 29 patients; 37.7%) followed by right inferior parathyroid adenoma (26 patients; 33.8%), right superior parathyroid adenoma (9 patients; 11.7%) and left superior parathyroid adenoma (8 patients; 10.4%). More than one parathyroid adenoma was seen in three patients, while two patients had ectopic parathyroid gland in the superior mediastinum.

After parathyroidectomy, patients were followed up from 3 months to 5 years. There was a significant reduction in serum calcium and PTH levels 1 week after parathyroidectomy (for both, P = 0.0001) [Table 2]. Patients with RAP and CP who underwent extracorporeal shock wave lithotripsy and endoscopic retrograde cholangiopancreatography had no further episodes of pain. The severity and frequency of pain episodes was also reduced for all other patients with CP.


  Discussion Top


The association between pancreatitis and PHPT was first reported in 1947.[19] Hypercalcemia, which is mainly secondary to PHPT, is a rare but well-recognized cause of AP and CP. However, the prevalence of pancreatitis in patients with PHPT has been reported to vary (1.5%–13%).[4],[5],[6],[7],[8],[9],[10],[11] Although many studies suggest an association between PHPT and pancreatitis, it remains controversial. Earlier studies from India have found the incidence of PHPT-associated pancreatitis to be between 6.8% and 12%.[9] However, in patients with PHPT and the resulting hypercalcemia, the incidence of pancreatitis is 10–20 times higher than the general population.[20] In 1962, Mixter et al.[21] reported 62 cases of PHPT-associated pancreatitis. The current study retrospectively analyzed the data of 77 patients who presented with RAP (n = 41) and CP (n = 36) and were later found to have hypercalcemia and PHPT due to parathyroid adenoma. To the best of the authors' knowledge, to date, this is the largest study of parathyroid adenoma-associated pancreatitis.

About two-thirds of the 77 patients in the current study were males. This finding is in agreement with that of Carnaille et al.[6] and Jacob et al.,[9] who found that PHPT-associated pancreatitis was more common in males, with a male:female ratio of 2:1. Similarly, Shah et al.[22] found pancreatitis to be more common among male symptomatic PHPT patients. On the contrary, with PHPT without the associated pancreatic disease, there is a female preponderance.[22]

The mean age of the patients in the current study was 36.3 ± 16 years. This finding is similar to that observed in a single-center study from South India that assessed 110 consecutive PHPT patients and found the mean age of the patients was 37.5 ± 11.2 years, although there was female preponderance in that study (70.9%). In the same study, pancreatitis was observed in 8 (7%) PHPT patients.[23] In other Indian studies, 27 of 153 patients with symptomatic PHPT (18%) and 6 of 87 PHPT patients (6.8%) had pancreatitis (5 patients had pancreatitis as the presenting complaint).[22],[24] A large-scale study from India that assessed clinical manifestations among 464 patients with PHPT found that 12.3% of the patients had pancreatitis.[25] In our study, most of the patients suffered from recurrent attacks of pancreatitis before a diagnosis of PHPT due to parathyroid adenoma was made.

There was a positive association between the serum calcium and serum PTH levels in this study. The simultaneous increase in the levels of both clearly indicates that hypercalcemia was caused by PHPT. In PHPT patients with sufficient vitamin D reserve, hypercalcemia occurs as a result of increased absorption of calcium from the intestines.[26] Hypercalcemia causes de novo activation of trypsinogen to trypsin, which results in acinar cell damage, autodigestion of the pancreas and, subsequently, pancreatitis.[12] PHPT patients with hypercalcemia have a 1.3 times higher risk of developing pancreatitis.[22] Hypercalcemia can also lead to pancreatic calculi and protein plug formation by altering pancreatic secretion, resulting in ductal obstruction that leads to subsequent attacks of RAP or CP.[27] Apart from calcium, genetic predisposition may also lead to AP in patients with PHPT.[28]

In this study, after parathyroidectomy, there was a significant reduction in the serum calcium and parathyroid levels in all patients. In addition, the number of episodes and the severity of abdominal pain reduced in patients with CP. Therefore, parathyroidectomy improved the clinical outcomes of PHPT and, possibly, prevented further attacks of pancreatitis. Similarly, Diaconescu et al.[29] showed that postoperative clinical and humoral outcome was favorable in all patients with parathyroid adenoma. Following parathyroidectomy, which is the definitive treatment for PHPT, PTH levels normalize within 30 h, while the serum calcium concentration reaches its lowest point in about 24–36 h.[30] With the eventual normalization of the serum calcium levels, there is no premature activation of trypsinogen to trypsin in the pancreatic acinar cells, thereby preventing further attacks of pancreatitis.

A limitation of this study was that the authors evaluated patients who presented with pancreatitis and were later found to have hypercalcemia and parathyroid adenoma, because of which the study could not estimate the burden of PHPT. To provide a better estimation of PHPT burden and morphology, future studies should include patients with hypercalcemia/parathyroid adenoma who subsequently develop pancreatitis.


  Conclusions Top


Estimation of serum calcium after an episode of unexplained pancreatitis is very important and would help minimize the delay in diagnosing PHPT and possibly prevent the progression of pancreatitis. Parathyroidectomy improves the clinical outcome of PHPT and prevents further attacks of pancreatitis.

Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
  References Top

1.
Kearns AE, Thompson GB. Medical and surgical management of hyperparathyroidism. Mayo Clin Proc 2002;77:87-91.  Back to cited text no. 1
    
2.
Bilezikian JP, Potts JT Jr., Fuleihan Gel-H, Kleerekoper M, Neer R, Peacock M, et al. Summary statement from a workshop on asymptomatic primary hyperparathyroidism: A perspective for the 21st century. J Bone Miner Res 2002;17 Suppl 2:N2-11.  Back to cited text no. 2
    
3.
Solimando DA. Overview of hypercalcemia of malignancy. Am J Health Syst Pharm 2001;58 Suppl 3:S4-7.  Back to cited text no. 3
    
4.
Koppelberg T, Bartsch D, Printz H, Hasse C, Rothmund M. Pancreatitis in primary hyperparathyroidism (pHPT) is a complication of advanced pHPT. Dtsch Med Wochenschr 1994;119:719-24.  Back to cited text no. 4
    
5.
Sitges-Serra A, Alonso M, de Lecea C, Gores PF, Sutherland DE. Pancreatitis and hyperparathyroidism. Br J Surg 1988;75:158-60.  Back to cited text no. 5
    
6.
Carnaille B, Oudar C, Pattou F, Combemale F, Rocha J, Proye C, et al. Pancreatitis and primary hyperparathyroidism: Forty cases. Aust N Z J Surg 1998;68:117-9.  Back to cited text no. 6
    
7.
Bess MA, Edis AJ, van Heerden JA. Hyperparathyroidism and pancreatitis. Chance or a causal association? JAMA 1980;243:246-7.  Back to cited text no. 7
    
8.
Vestergaard P, Mosekilde L. Cohort study on effects of parathyroid surgery on multiple outcomes in primary hyperparathyroidism. BMJ 2003;327:530-4.  Back to cited text no. 8
    
9.
Jacob JJ, John M, Thomas N, Chacko A, Cherian R, Selvan B, et al. Does hyperparathyroidism cause pancreatitis? A South Indian experience and a review of published work. ANZ J Surg 2006;76:740-4.  Back to cited text no. 9
    
10.
van Lanschot JJ, Bruining HA. Primary hyperparathyroidism and pancreatitis. Neth J Surg 1984;36:38-41.  Back to cited text no. 10
    
11.
Ronni-Sivula H. The state of health of patients previously operated on for primary hyperparathyroidism compared with randomized controls. Ann Chir Gynaecol 1985;74:60-5.  Back to cited text no. 11
    
12.
Kota SK, Krishna SV, Lakhtakia S, Modi KD. Metabolic pancreatitis: Etiopathogenesis and management. Indian J Endocrinol Metab 2013;17:799-805.  Back to cited text no. 12
    
13.
Bai HX, Giefer M, Patel M, Orabi AI, Husain SZ. The association of primary hyperparathyroidism with pancreatitis. J Clin Gastroenterol 2012;46:656-61.  Back to cited text no. 13
    
14.
Prinz RA, Aranha GV. The association of primary hyperparathyroidism and pancreatitis. Am Surg 1985;51:325-9.  Back to cited text no. 14
    
15.
Carey MC, Fitzgerald O. Hyperparathyroidism associated with chronic pancreatitis in a family. Gut 1968;9:700-3.  Back to cited text no. 15
    
16.
Feldman M, Friedman LS, Brandt LJ. Sleisenger and Fordtran's Gastrointestinal and Liver Disease E-Book: Pathophysiology, Diagnosis, Management, Expert Consult Premium Edition-Enhanced Online Features. Elsevier Health Sciences; 2010.  Back to cited text no. 16
    
17.
Janssen JW, Helbing AR. Arsenazo III: An improvement of the routine calcium determination in serum. Eur J Clin Chem Clin Biochem 1991;29:197-201.  Back to cited text no. 17
    
18.
Goldstein RE, Blevins L, Delbeke D, Martin WH. Effect of minimally invasive radioguided parathyroidectomy on efficacy, length of stay, and costs in the management of primary hyperparathyroidism. Ann Surg 2000;231:732-42.  Back to cited text no. 18
    
19.
Smith FB, Cooke RT. Acute fatal hyperparathyroidism. Lancet 1940;2:650-1.  Back to cited text no. 19
    
20.
Bist SS, Ahuja V, Agrawal V, Modi S. Photo clinic: Recurrent acute pancreatitis: A diagnostic clue to primary hyperparathyroidism. Iran J Med Sci 2016;41:361-2.  Back to cited text no. 20
    
21.
Mixter CG Jr., Keynes WM, Cope O. Further experience with pancreatitis as a diagnostic clue to hyperparathyroidism. N Engl J Med 1962;266:265-72.  Back to cited text no. 21
    
22.
Shah VN, Bhadada SK, Bhansali A, Behera A, Bhattacharya A, Nahar U, et al. Effect of gender, biochemical parameters and parathyroid surgery on gastrointestinal manifestations of symptomatic primary hyperparathyroidism. Indian J Med Res 2014;139:279-84.  Back to cited text no. 22
[PUBMED]  [Full text]  
23.
Jha S, Jayaraman M, Jha A, Jha R, Modi KD, Kelwadee JV, et al. Primary hyperparathyroidism: A changing scenario in India. Indian J Endocrinol Metab 2016;20:80-3.  Back to cited text no. 23
    
24.
Agarwal A, George RK, Gupta SK, Mishra SK. Pancreatitis in patients with primary hyperparathyroidism. Indian J Gastroenterol 2003;22:224-5.  Back to cited text no. 24
[PUBMED]    
25.
Bhadada SK, Arya AK, Mukhopadhyay S, Khadgawat R, Sukumar S, Lodha S, et al. Primary hyperparathyroidism: Insights from the Indian PHPT registry. J Bone Miner Metab 2017. doi 10.1007/s00774-017-0833-8 [Epub ahead of print].  Back to cited text no. 25
    
26.
Baglin A, Junien C, Prinseau J. Primary hyperparathyroidism. Mechanisms of hypercalcemia. Presse Med 1991;20:701-5.  Back to cited text no. 26
    
27.
Noel-Jorand MC, Verine HJ, Sarles H. Dose-dependent, and long-lasting, effects of repeated intravenous injections of calcium on the canine secretin-stimulated pancreatic juice secretion. Eur J Clin Invest 1981;11:25-31.  Back to cited text no. 27
    
28.
Felderbauer P, Karakas E, Fendrich V, Bulut K, Horn T, Lebert R, et al. Pancreatitis risk in primary hyperparathyroidism: Relation to mutations in the SPINK1 trypsin inhibitor (N34S) and the cystic fibrosis gene. Am J Gastroenterol 2008;103:368-74.  Back to cited text no. 28
    
29.
Diaconescu MR, Costea I, Glod M, Terinte R, Diaconescu S. Parathyroid adenomas in adults and adolescents. Critical appraisal and surgical strategy in 18 cases. Chirurgia (Bucur) 2017;112:18-24.  Back to cited text no. 29
    
30.
Taniegra ED. Hyperparathyroidism. Am Fam Physician 2004;69:333-9.  Back to cited text no. 30
    


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