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parathyroid hormone (PTH)

Practice targeted AMC-style multiple-choice questions on parathyroid hormone (PTH).

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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her GP with a 6-month history of increasing fatigue, generalised bone aches, and constipation. She has no significant past medical history and takes no regular medications. Physical examination is unremarkable. Initial laboratory investigations reveal a corrected serum calcium level of 3.1 mmol/L (reference range: 2.1-2.6 mmol/L) and an elevated parathyroid hormone (PTH) level of 180 pg/mL (reference range: 10-65 pg/mL). A 24-hour urine calcium excretion is 12 mmol/day (reference range: 2.5-7.5 mmol/day). She is referred for further imaging, the results of which are shown. Based on the available information, what is the MOST appropriate next step in the management of this patient?

A. Order genetic testing for MEN syndromes
B. Surgical parathyroidectomy
C. Repeat parathyroid localisation imaging
D. Initiate medical therapy with cinacalcet
E. Perform a bone mineral density scan
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 58-year-old woman presents with fatigue, muscle weakness, and abdominal pain. Labs show serum calcium 3.2 mmol/L and PTH 190 pg/mL. Renal function is normal. Imaging studies are shown. Based on the clinical presentation, laboratory findings, and imaging studies, what is the MOST appropriate next step in managing this patient?

A. Start intravenous fluids and calcitonin
B. Initiate medical management with cinacalcet
C. Refer for genetic testing for MEN syndromes
D. Repeat imaging studies in 6 months
E. Surgical parathyroidectomy
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 68-year-old male presents with a serum calcium of 2.8 mmol/L (2.1-2.6 mmol/L) and PTH of 95 pg/mL (10-65 pg/mL). He denies kidney stones but reports new-onset constipation. Relevant imaging is shown. What is the MOST likely diagnosis?

A. Familial hypocalciuric hypercalcemia
B. Vitamin D toxicity
C. Thyroid carcinoma
D. Parathyroid adenoma
E. Sarcoidosis
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents with fatigue, bone pain, and constipation. Laboratory tests reveal serum calcium 3.1 mmol/L, PTH 180 pg/mL, and elevated 24-hour urine calcium. Imaging studies are shown. Considering the clinical presentation and investigation findings, what is the MOST appropriate next step in the management of this patient?

A. Further imaging with MRI of the neck
B. Surgical parathyroidectomy
C. Long-term observation with serial calcium and PTH measurements
D. Initiation of medical therapy with cinacalcet
E. Commencement of intravenous bisphosphonate therapy
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her general practitioner complaining of fatigue, bone pain, and constipation for the past several months. She denies any significant past medical history. Initial laboratory investigations reveal an elevated serum calcium level of 3.1 mmol/L (reference range: 2.1-2.6 mmol/L) and an elevated parathyroid hormone (PTH) level of 180 pg/mL (reference range: 10-65 pg/mL). A 24-hour urine calcium excretion is also elevated. The patient is referred for further imaging, the results of which are shown. Based on the available information, what is the MOST appropriate next step in the management of this patient?

A. Initiate medical management with cinacalcet
B. Prescribe bisphosphonates for bone pain
C. Repeat serum calcium and PTH in 3 months
D. Parathyroidectomy
E. Refer for genetic testing for multiple endocrine neoplasia syndromes
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her GP with a 6-month history of increasing fatigue, generalised bone aches, and constipation. She denies polyuria or polydipsia. Her past medical history is unremarkable, and she takes no regular medications. On examination, her vital signs are stable, and there are no palpable neck masses. Initial laboratory investigations show serum calcium 3.1 mmol/L (2.1-2.6), phosphate 0.7 mmol/L (0.8-1.4), PTH 180 pg/mL (10-65), and 24-hour urine calcium 450 mg (100-300). She is referred for further imaging, the results of which are shown. Based on the available information, what is the MOST appropriate next step in the management of this patient?

A. Perform a bone mineral density scan
B. Initiate medical therapy with cinacalcet
C. Order genetic testing for MEN syndromes
D. Repeat parathyroid localisation imaging
E. Surgical parathyroidectomy
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman with osteoporosis and a history of kidney stones presents with a serum calcium of 2.9 mmol/L (2.1-2.6 mmol/L) and PTH of 120 pg/mL (10-65 pg/mL). She denies neck pain or swelling. The provided imaging was obtained. What is the MOST appropriate next step?

A. Cinacalcet to lower PTH levels
B. Vitamin D and calcium supplementation
C. Surgical excision of the identified lesion
D. Bisphosphonate therapy and observation
E. Thyroidectomy
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 58-year-old woman presents with persistent fatigue, muscle weakness, and vague abdominal pain. Investigations reveal serum calcium 3.2 mmol/L (2.1-2.6), PTH 190 pg/mL (10-65). Renal function is normal. She denies family history of endocrine disorders. Imaging studies are performed, as shown. Considering the clinical presentation and the findings from the imaging modalities, what is the definitive management strategy for this patient?

A. Initiation of bisphosphonate therapy
B. Surgical excision of the identified lesion
C. Observation with regular monitoring of calcium and PTH levels
D. Radiofrequency ablation of the lesion
E. Long-term medical management with cinacalcet
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her general practitioner complaining of fatigue, bone pain, and constipation for the past several months. She denies any significant past medical history. Initial laboratory investigations reveal an elevated serum calcium level of 3.1 mmol/L (reference range: 2.1-2.6 mmol/L) and an elevated parathyroid hormone (PTH) level of 180 pg/mL (reference range: 10-65 pg/mL). A 24-hour urine calcium excretion is also elevated. The patient is referred for further imaging, the results of which are shown. Based on the available information, what is the MOST appropriate next step in the management of this patient?

A. Surgical excision of the identified lesion
B. Vitamin D supplementation
C. Cinacalcet administration
D. Initiation of bisphosphonate therapy
E. Observation with serial calcium and PTH monitoring
Mark this as a high-quality question
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman with osteoporosis and a history of kidney stones presents for evaluation. Her calcium is 2.9 mmol/L (2.1-2.6 mmol/L), PTH 110 pg/mL (10-65 pg/mL), and creatinine is normal. She denies neck pain or swelling. Given the imaging, what is the MOST appropriate next step?

A. Cinacalcet administration
B. Vitamin D supplementation
C. Surgical exploration and parathyroidectomy
D. Observation with serial calcium monitoring
E. Bisphosphonate therapy
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents with fatigue, bone pain, and constipation. Laboratory investigations reveal serum calcium 3.1 mmol/L, parathyroid hormone 180 pg/mL, and elevated 24-hour urine calcium excretion. Imaging studies are performed for pre-operative localisation, the results of which are shown. Considering the clinical context and the findings demonstrated in the images, which surgical approach is MOST likely indicated for definitive management?

A. Targeted parathyroidectomy via hemithyroidectomy
B. Medical management with cinacalcet
C. Minimally invasive parathyroidectomy
D. Bilateral neck exploration
E. Observation with regular calcium monitoring
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 58-year-old woman presents with persistent fatigue, muscle weakness, and vague abdominal pain. Her serum calcium is 3.2 mmol/L (2.1-2.6 mmol/L), and PTH is 190 pg/mL (10-65 pg/mL). Renal function is normal. She denies any family history of endocrine disorders. Imaging studies are performed, as shown. Based on the clinical context and the imaging findings presented, which of the following represents the definitive management strategy for this patient?

A. Repeat serum calcium and PTH in three months.
B. Surgical excision of the identified lesion.
C. Order a skeletal survey to assess for osteitis fibrosa cystica.
D. Initiate treatment with cinacalcet and monitor calcium levels.
E. Perform a fine needle aspiration biopsy of the lesion.
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman with osteoporosis and a history of kidney stones presents for evaluation. Her calcium is 2.9 mmol/L (2.1-2.6 mmol/L), and PTH is 110 pg/mL (10-65 pg/mL). Imaging is shown. What is the MOST appropriate next step?

A. Bisphosphonate therapy
B. Cinacalcet administration
C. Vitamin D and calcium supplementation
D. Serial calcium and PTH monitoring
E. Referral for parathyroidectomy
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her general practitioner complaining of fatigue, bone pain, and constipation for the past several months. She denies any significant past medical history. Her vital signs are stable. Initial laboratory investigations reveal an elevated serum calcium level of 3.1 mmol/L (reference range: 2.1-2.6 mmol/L) and an elevated parathyroid hormone (PTH) level of 180 pg/mL (reference range: 10-65 pg/mL). A 24-hour urine calcium excretion is also elevated. The patient is referred for further imaging, the results of which are shown. Based on the available information, what is the MOST appropriate next step in the management of this patient?

A. Initiate medical management with cinacalcet
B. Repeat serum calcium and PTH in 3 months
C. Order a bone mineral density scan
D. Surgical parathyroidectomy
E. Refer for genetic testing for multiple endocrine neoplasia
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman with osteoporosis and a history of kidney stones presents for evaluation. Her calcium is 2.9 mmol/L (2.1-2.6 mmol/L), PTH 110 pg/mL (10-65 pg/mL), and creatinine is normal. She denies neck pain or swelling. Given the imaging, what is the MOST appropriate next step?

A. Vitamin D supplementation and repeat calcium level in 3 months
B. Bisphosphonate therapy
C. Kidney stone removal
D. Surgical exploration and parathyroidectomy
E. Cinacalcet administration
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 58-year-old woman presents with persistent fatigue, muscle weakness, and vague abdominal pain. Her serum calcium is 3.2 mmol/L (2.1-2.6 mmol/L), and PTH is 190 pg/mL (10-65 pg/mL). She denies any history of fractures or kidney stones. She was referred for imaging, as shown. What is the MOST appropriate next step in managing this patient?

A. Surgical excision of the identified lesion
B. Cinacalcet administration
C. Observation with serial calcium monitoring
D. Bisphosphonate therapy
E. Vitamin D supplementation
Mark this as a high-quality question
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 58-year-old woman presents with persistent fatigue, muscle weakness, and vague abdominal pain. Her serum calcium is 3.2 mmol/L (2.1-2.6 mmol/L), and PTH is 190 pg/mL (10-65 pg/mL). Renal function is normal. She denies any family history of endocrine disorders. Imaging studies are performed, as shown. What is the MOST appropriate next step in managing this patient?

A. Vitamin D supplementation and repeat calcium measurement in 3 months
B. Surgical excision of the identified lesion
C. Cinacalcet administration to lower PTH levels
D. Bisphosphonate therapy and monitoring of calcium levels
E. Thyroidectomy
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her general practitioner complaining of fatigue, bone pain, and constipation for the past several months. She denies any significant past medical history. Initial laboratory investigations reveal an elevated serum calcium level of 3.1 mmol/L (reference range: 2.1-2.6 mmol/L) and an elevated parathyroid hormone (PTH) level of 180 pg/mL (reference range: 10-65 pg/mL). A 24-hour urine calcium excretion is also elevated. The patient is referred for further imaging, the results of which are shown. Based on the available information, what is the MOST appropriate next step in the management of this patient?

A. Referral for surgical parathyroidectomy
B. Repeat imaging with a different modality
C. Initiate medical therapy with cinacalcet
D. Schedule regular monitoring of serum calcium and PTH levels
E. Begin treatment with intravenous fluids and bisphosphonates
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her general practitioner complaining of fatigue, bone pain, and constipation for the past several months. She denies any significant past medical history and her vital signs are stable. Initial laboratory investigations reveal an elevated serum calcium level of 3.1 mmol/L (reference range: 2.1-2.6 mmol/L) and an elevated parathyroid hormone (PTH) level of 180 pg/mL (reference range: 10-65 pg/mL). A 24-hour urine calcium excretion is also elevated. The patient is referred for further imaging, the results of which are shown. Based on the available information, what is the MOST appropriate next step in the management of this patient?

A. Referral for surgical parathyroidectomy
B. Order a DEXA scan to assess bone mineral density
C. Initiate medical management with cinacalcet
D. Repeat parathyroid hormone and calcium levels in 3 months
E. Prescribe bisphosphonates to reduce bone resorption
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her general practitioner complaining of fatigue, bone pain, and constipation for the past several months. She denies any significant past medical history and is on no regular medications. Physical examination is unremarkable, and vital signs are within normal limits. Initial laboratory investigations reveal an elevated serum calcium level of 3.1 mmol/L (reference range: 2.1-2.6 mmol/L) and an elevated parathyroid hormone (PTH) level of 180 pg/mL (reference range: 10-65 pg/mL). A 24-hour urine calcium excretion is also elevated. The patient is referred for further imaging, the results of which are shown. Based on the available information, what is the MOST appropriate next step in the definitive management of this patient?

A. Long-term medical management with cinacalcet
B. Parathyroidectomy
C. Dietary calcium restriction
D. Bisphosphonate therapy
E. Repeat imaging studies in 6 months
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CT, ultrasonography, SPECT and scintigraphy of intra-thyroid parathyroid adenoma
Image by Mnahi Bin Saeedan, Ibtisam Musallam Aljohani, Ayman Omar Khushaim, Salwa Qasim Bukhari, Salahudin Tayeb Elnaas CC BY 4.0 · Source

A 62-year-old woman presents to her general practitioner complaining of fatigue, bone pain, and constipation for the past several months. She denies any significant past medical history. Initial laboratory investigations reveal an elevated serum calcium level of 3.1 mmol/L (reference range: 2.1-2.6 mmol/L) and an elevated parathyroid hormone (PTH) level of 180 pg/mL (reference range: 10-65 pg/mL). A 24-hour urine calcium excretion is also elevated. The patient is referred for further imaging, the results of which are shown. Considering the clinical presentation and the findings from the imaging studies, which of the following surgical approaches is MOST likely to be indicated?

A. Total thyroidectomy
B. Subtotal parathyroidectomy
C. Radiofrequency ablation of the lesion
D. Bilateral neck exploration
E. Minimally invasive parathyroidectomy
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