Incidental Parathyroidectomy in Surgical Treatment of Thyroid Gland Diseases

Authors: M. Žárska;  P. Hanzel;  A. Hajtman
Authors‘ workplace: Klinika ORL a ChHaK JLF UK a UNM v Martine, prednosta prof. MUDr. A. Hajtman, Ph. D.
Published in: Otorinolaryng. a Foniat. /Prague/, 64, 2015, No. 4, pp. 201-204.
Category: Original Papers


Incidental parathyroidectomy is one of the complications of thyroid surgery. In this study, we investigated the frequency, risk factors, clinical and laboratory symptoms of incidental parathyroidectomy.

Materials and methods:
The retrospective study included 419 patients who had undergone thyroid surgery in our department between January 2011 and December 2013. The incidental parathyroidectomy was identified based on the pathological reports. For statistical purpose we use the CHI – test.

419 patients were enrolled in the study. The number of incidental parathyroidectomy cases was determined as 26 (6.2%). In 3 cases, two parathyroid glands were excised. The laboratory values of hypocalcaemia were observed in 133 patients (31.74%), 29 of them had clinical symptoms of hypocalcaemia (6.92%). In the group of 26 patients with the incidental parathyroidectomy, there were 5 of them with clinical and laboratory signs of hypocalcaemia. In the group of 393 patients without incidental parathyroidectomy, there were 128 patients (32.57%) with low calcium levels and 24 patients (6.1%) with clinical signs of hypocalcaemia. In the group of patients with incidental parathyroidectomy the rate of clinical signs of hypocalcaemia was statistically higher (P=0.01).

Risk factors for inadvertent parathyroid resection included malignant etiology (P<0.05). Bilateral thyroid resection wasn't significant risk factor (P>0.05).

Papillary thyroid carcinoma is the risk factor of the incidental parathyroidectomy. In the group of patients with incidental parathyroidectomy the rate of symptomatic hypocalcaemia is significantly higher.

incidental parathyroidectomy, hypocalcaemia, parathyroid glands, thyroid surgery


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