Hypocalcaemia in pharyngolaryngectomy: Preservation or autotransplantation of parathyroid glands.

Laryngoscope investigative otolaryngology(2021)

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Abstract
OBJECTIVE:To describe transient and permanent hypocalcaemia following partial and total pharyngolaryngectomy with parathyroid gland preservation or autotransplantation. METHODS:Thirty patients underwent partial or total pharyngolaryngectomy by a single surgeon during the period 2009-2020. Intraoperative parathyroid gland preservation or autotransplantation (where the gland appeared devascularized) was routinely performed. Calcium levels performed on day 1, 3 months, and at 12 months postoperatively were collected. Rates of transient and permanent hypocalcaemia were calculated. RESULTS:A total of 13% of patients had transient hypocalcaemia, and 10% permanent hypocalcaemia. Rates of transient and permanent hypocalcaemia in total pharyngolaryngectomy were 14% and 14%, respectively. Partial pharyngectomy hypocalcaemia rates were 13% for transient and 0% for permanent. The majority of patients underwent salvage surgery for oncological resection, often following radiotherapy (63%). Ipsilateral hemithyroidectomy was preferred to total (57% vs 7%), with high rates of concurrent neck dissection (67%) and reconstruction (87%). CONCLUSION:This data supports preservation or autotransplantation of parathyroid glands as a means of reducing permanent postoperative hypocalcaemia. LEVEL OF EVIDENCE:Level IV, case series, retrospective.
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