Nonfunctional parathyroid cyst: case report

Abstract

CONTEXT: Parathyroid cysts are rare clinical and pathological entities, with less than 300 cases reported. The inferior parathyroid glands are most commonly involved, with left-side predominance. Parathyroid cysts may be functional or nonfunctional, depending on their association with hypercalcemia. CASE REPORT:A 25-year-old man presented a palpable asymptomatic left-side neck mass. Ultrasound revealed a cystic structure contiguous with the left thyroid lobe. Serum ionic calcium was normal. The patient underwent left thyroid lobectomy plus isthmectomy with excision of the cyst. The histological findings revealed a parathyroid cyst. Parathyroid cysts typically present as asymptomatic neck masses, and surgical excision appears to be the treatment of choice.RESUMO CONTEXTO: Cistos de paratireóide são entidades clínicas e patológicas raras, com menos de 300 casos relatados. As glândulas paratireóides inferiores são mais comumente envolvidas, com predomínio do lado esquerdo. Cistos de paratireóide podem ser funcionais ou não, dependendo de sua associação com hipercalcemia. RELATO DE CASO:Um homem de 25 anos apresentou-se com massa cervical esquerda palpável assintomática. A ultrassonografia revelou uma estrutura cística contígua com o lobo tireoidiano esquerdo. O cálcio iônico sérico estava normal. O paciente foi submetido a lobectomia esquerda com istmectomia e excisão do cisto. Os achados histopatológicos revelaram cisto de paratireóide. Cistos de paratireóide tipicamente se apresentam como massas cervicais assintomáticas e a ressecção cirúrgica parece ser o tratamento de escolha.

Parathyroid cysts

“…This technique was especially used in case of a recurrence of PCs after FNA in order that open surgery is avoided. [ 17 , 172 , 200 , 212 , 214 ] In the literature, there are several reports of sclerotherapy with tetracycline or ethanol injection used as treatment of PCs, especially in nonfunctioning ones. [ 170 , 178 , 217 – 219 ]…”

“…[ 200 ] After surgical excision of PCs, hypocalcemia, hypercalcemic crisis, hemorrhage, and recurrent laryngeal nerve palsy have been referred as postoperative complications. [ 18 , 65 , 172 , 195 ] Neck pain and neurotoxicity leading to recurrent laryngeal nerve palsy seem to have an association with sclerotherapy. [ 172 , 210 ]…”

An Unusual Cystic Lesion, Parathyroid Cyst

“…[1,3,7,9] It has been reported that ultrasound, computerized tomography or magnetic resonance imaging may be helpful in discriminating solid/cystic cervical masses and showing their anatomical relation, and that thyroid scintigraphy may be helpful in revealing the presence of non-functional cysts, however none of these imaging methods can discriminate the thyroid/parathyroid origin of the lesions. [1,3,[7][8][9] In physical examination, PCs are soft, mobile masses. They have a semitransparent thin wall with smooth and shiny surface, that can easily be dissected from the thyroid tissue and surrounding tissues.…”

Intrathyroidal Parathyroid Cyst: An Unusual Neck Mass

“…1 So far, approximately 300 cases have been reported in the literature. 2,3 Parathyroid cysts are categorized as functioning and nonfunctioning depending on their ability to secrete parathyroid hormone (PTH). 4 Parathyroid cysts are mostly nonfunctional with nonspecific physical and radiological characteristics.…”