Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
Αναπαύσεως 5 Άγιος Νικόλαος
Κρήτη 72100
00302841026182
00306932607174
alsfakia@gmail.com

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! # Ola via Alexandros G.Sfakianakis on Inoreader

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Κυριακή 16 Δεκεμβρίου 2018

Efficacy of calcium excretion and calcium/creatinine clearance ratio in the differential diagnosis of familial hypocalciuric hypercalcemia and primary hyperparathyroidism

Abstract

Background

Twenty‐four‐hour renal calcium‐excretion (CE) and calcium/creatinine‐clearance‐ratio (CCCR), respectively, are widely used to rule out familial hypocalciuric hypercalcemia (FHH) in patients with suspected primary hyperparathyroidism before surgery. The aim was to evaluate the practicability of CE compared to CCCR.

Patients and Methods

We analyzed biochemical parameters, surgical treatment, gene mutation results, and long‐term follow‐up data of 198 patients (including 14 patients with FHH) and the discriminative power of CE and CCCR.

Results

Twenty four patients (12.1%) had a low CE and 35 patients (20.2%) had a CCCR indicating FHH. However, eight patients with FHH (57.1%) had a normal or increased CE. Correspondingly, only eight cases of FHH (57.1%) were correctly predicted by CCCR. Sensitivity/specificity were 42.9%/89.9% for CE and 64.3%/79.9% for CCCR, showing no statistical differences (P = 0.482) between both methods.

Conclusion

Neither CE nor CCCR was able to distinguish between PHPT and FHH but may help to narrow down potential FHH patients.



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