| Course | PA 522 Comprehensive Clinical Module Endocrinology |
|---|---|
| Week | 3 |
| Paper type | Paired hormone interpretation |
| Length | About 670 words, 5 pages |
| Format | APA 7 student paper |
| School | Chamberlain University |
| Program | Master of Physician Assistant Studies (MPAS) |
| Updated | October 2026 |
Free sample paper for PA 522 Week 3
Paired Hormone Interpretation From the Kidney Stone Visit: A Calcium of 10.7 With a PTH of 61 That Should Have Been Near the Floor, and a Three-Item Shortlist Including the Thiazide
Student Name
Chamberlain University
PA 522: Comprehensive Clinical Module Endocrinology
Instructor Name
Month Day, Year
Paired Hormone Interpretation From the Kidney Stone Visit: A Calcium of 10.7 With a PTH of 61 That Should Have Been Near the Floor, and a Three-Item Shortlist Including the Thiazide
The Two Results
Serum calcium 10.7 mg/dL (laboratory interval 8.6 to 10.3), albumin 4.2 g/dL, so no correction is needed. Intact parathyroid hormone 61 pg/mL (laboratory interval 15 to 65). Both drawn together at 8:40 a.m., fasting, at the follow-up visit for M.T.'s right ureteral stone. Creatinine 0.9 mg/dL; 25-hydroxyvitamin D 27 ng/mL.
Prediction Before Observation
If the parathyroid glands were working normally, a calcium of 10.7 should have pushed parathyroid hormone down toward the bottom of its interval or below it, since the glands sense calcium directly and release less hormone as calcium rises. With a calcium above the interval, a parathyroid hormone near 15 or lower would be the expected answer.
The Inappropriately Normal Partner
It did not fall. At 61 pg/mL, parathyroid hormone sits inside its interval, near the top. A value that would be unremarkable on its own is inappropriate in this setting: the glands are releasing hormone as though calcium were normal or low. That pattern, a high calcium with a parathyroid hormone that is not suppressed, defines parathyroid hormone-dependent hypercalcemia (Bilezikian et al., 2022).
A Shortlist Built From These Numbers
Primary hyperparathyroidism: the most common cause of this pattern, and the kidney stone fits it.
Thiazide effect with an underlying parathyroid problem: M.T. takes hydrochlorothiazide 25 mg daily for blood pressure. Thiazides lower urinary calcium loss and can raise serum calcium, and a large population study found that many people who become hypercalcemic on a thiazide have primary hyperparathyroidism unmasked rather than a pure drug effect (Griebeler et al., 2016).
Familial hypocalciuric hypercalcemia: a rare inherited change in the calcium sensor that produces the same blood pattern but very low urinary calcium. M.T. has no family history of high calcium, which makes it less likely but does not exclude it.
What the Pair Cannot Decide
The pair cannot separate primary hyperparathyroidism from familial hypocalciuric hypercalcemia, because both produce a high calcium with a normal or high parathyroid hormone. It cannot say how much of the calcium is due to the thiazide. And it is one draw: calcium varies, and a single high value should be confirmed.
One Next Measurement
Stop hydrochlorothiazide, replacing it with another blood pressure medicine, and after four weeks repeat calcium and parathyroid hormone together with a 24-hour urine collection for calcium and creatinine. The urine result separates the two main candidates: in familial hypocalciuric hypercalcemia the calcium to creatinine clearance ratio is usually below 0.01, while it is higher in primary hyperparathyroidism (Bilezikian et al., 2022). Stopping the thiazide first matters because the drug itself lowers urinary calcium and could make primary hyperparathyroidism look like the familial condition.
Why the Vitamin D Value Matters
A low vitamin D level raises parathyroid hormone on its own, as the glands respond to poor calcium absorption, and it can make a parathyroid hormone look inappropriate when it is only compensating. M.T.'s 25-hydroxyvitamin D of 27 ng/mL sits close to the level the workshop suggests aiming for before judging parathyroid hormone (Bilezikian et al., 2022), and in any case low vitamin D would lower, not raise, the serum calcium. It does not explain this pair. It will be rechecked with the repeat draw so that the urine collection is not read against a falling vitamin D.
Bearing on the Rest of the Case
The thiazide change has a second effect. The adrenal workup planned for M.T. needs diuretics stopped before the confirmatory aldosterone testing, so the medicine switch serves both questions. The replacement chosen should not interfere with renin and aldosterone testing either.
References
Bilezikian, J. P., Khan, A. A., Silverberg, S. J., Fuleihan, G. E.-H., Marcocci, C., Minisola, S., Perrier, N., Sitges-Serra, A., Thakker, R. V., Guyatt, G., Mannstadt, M., Potts, J. T., Clarke, B. L., & Brandi, M. L. (2022). Evaluation and management of primary hyperparathyroidism: Summary statement and guidelines from the Fifth International Workshop. Journal of Bone and Mineral Research, 37(11), 2293-2314. https://doi.org/10.1002/jbmr.4677
Griebeler, M. L., Kearns, A. E., Ryu, E., Thapa, P., Hathcock, M. A., Melton, L. J., III, & Wermers, R. A. (2016). Thiazide-associated hypercalcemia: Incidence and association with primary hyperparathyroidism over two decades. The Journal of Clinical Endocrinology and Metabolism, 101(3), 1166-1173. https://doi.org/10.1210/jc.2015-3964
The Chamberlain PA 522 Week 3 instructions
In week three the task is a pair of hormone results in which one value sits inside its reference interval when it should not. Present both results with units and any values needed to read them, such as albumin for calcium. Before describing what the partner did, state what it should have done if the gland were working normally. Then show that it did not, and explain why a value inside the interval can still be inappropriate. Build a short list of two or three conditions from these specific numbers and the patient's medicines, not from a textbook list. Say what the pair cannot decide between. Recommend one next measurement that would separate the leading candidates, and explain any preparation it needs. Keep the document short and close to a laboratory comment in style.
How the PA 522 Week 3 example is put together
The paper opens with calcium 10.7 mg/dL, albumin 4.2, parathyroid hormone 61 pg/mL near the top of its interval, creatinine 0.9 and vitamin D 27, all from the stone follow-up visit. A prediction section explains that rising calcium should have pushed the hormone toward 15 or lower. The next section names the result inappropriately normal and cites the Fifth International Workshop. Three candidates follow: primary hyperparathyroidism, a thiazide unmasking it, citing Griebeler and colleagues, and familial hypocalciuric hypercalcemia. The limits section says the pair cannot separate the familial condition. A vitamin D section explains why 27 ng/mL does not account for the result. The next measurement is a 24-hour urine calcium with the clearance ratio after four weeks off the thiazide, linked to the adrenal testing that needs the same switch.
Where the points sit in the PA 522 Week 3 rubric
Most of the credit here rests on the prediction and the word inappropriate. A comment that calls both values roughly normal, or that misses the relationship between them, loses the largest share. Faculty next look for the expected response stated before the observed one. The shortlist is graded on whether it comes from this patient's numbers and medicines; a generic list of every cause of hypercalcemia earns little. Credit is given for naming what the pair cannot separate. The single next measurement is marked on whether it would actually distinguish the leading candidates and on its preparation, such as stopping a drug that alters urinary calcium. Brevity counts in this format, and long background sections are penalized. Sources should support the thresholds used.
PA 522 Week 3 help from the desk
Students commonly lose marks on this comment by listing every cause of a high calcium without using the partner hormone. Share your two results and the medication list, and the comment drafted for you would predict what the partner should have done, show what it did and call the mismatch by its proper name. The shortlist is built from your numbers and drugs. One next measurement is recommended, with any preparation it needs, such as stopping a thiazide first. If your pair is a different one, such as ACTH with cortisol or TSH with free T4, the same structure applies. Values that affect the reading, like albumin or vitamin D, are addressed briefly. Confirm every interval and value against your own laboratory report before borrowing the reasoning.
Get a PA-522 Week 3 example written to your instructions
Send the two results your assignment supplies, the reference intervals beside them and the instructions in full, and a custom PA-522 Week 3 interpretation is written to those exact figures and returned inside 24 to 48 hours, the first one free. Where your section supplies a comment template, attach it and the sample fills that template instead of using the layout described here.
More PA 522 papers and MPAS samples
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- PA 520 Week 3: Obstructive Versus Restrictive Memo
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PA 522 Week 3 questions, answered
The assignment gives three values, not two. Does the format still hold?
It does, with one addition. Three results are read as a pair plus a constraint: two carry the main argument and the third narrows the shortlist or dates the disturbance. The sample states which role each value is playing rather than treating all three as equals, since flattening them is what usually turns a three-value question into a list of observations.
Should the interpretation name a diagnosis?
Only where the pair genuinely reaches one, which is less often than drafts assume. Most pairs establish which part of the axis is disordered and leave several conditions standing at that level. A sample names the level with confidence, names the shortlist as a shortlist, and says what would be needed to close the gap, which is the reasoning rubrics in this module reward.
My reference intervals differ from the ones in my textbook. Which should the sample use?
The ones your classroom supplies, every time. Attach the laboratory sheet with your request and the sample reads the values against those cutoffs. Where a result sits near an edge under one set of numbers and clearly inside under another, the sample says so in the text, because a borderline value that gets treated as decisive is a common source of lost points.
Where can I find a free PA 522 Week 3 sample paper?
This page carries the full PA 522 Week 3 interpretation of a calcium of 10.7 with an inappropriately normal parathyroid hormone of 61.
Why does the PA 522 Week 3 sample stop the thiazide before the urine test?
Hydrochlorothiazide lowers urinary calcium, which could make primary hyperparathyroidism look like familial hypocalciuric hypercalcemia on a 24-hour collection.