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Inicio Revista Española de Medicina Nuclear e Imagen Molecular (English Edition) Initial experience in the intraoperative radiolocalization of the parathyroid ad...
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Vol. 34. Issue 2.
Pages 116-119 (March - April 2015)
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Vol. 34. Issue 2.
Pages 116-119 (March - April 2015)
Clinical note
Initial experience in the intraoperative radiolocalization of the parathyroid adenoma with freehand SPECT and comparative assessment with portable gamma-camera
Experiencia inicial en la radiolocalización intraoperatoria del adenoma paratiroideo con freehand SPECT y valoración comparativa con gammacámara portátil
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I. Casáns-Tormoa,
Corresponding author
casans_ire@gva.es

Corresponding author.
, S. Prado-Wohlwenda, R. Díaz-Expósitoa, N. Cassinello-Fernándezb, J. Ortega-Serranob
a Servicio de Medicina Nuclear, Hospital Clínico Universitario, Valencia, Spain
b Servicio de Cirugía, Hospital Clínico Universitario, Valencia, Spain
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Abstract

Initial experience is presented by using freehand SPECT in the intraoperative radiolocalization of a parathyroid adenoma in 2 patients, one of which was mediastinal. There is only one previous publication including 3 patients with parathyroid adenomas in usual parathyroid localizations. We also report for the first time a comparative assessment of results with portable gammacamera during the same surgery.

In the operating room, we obtained images with portable gamma-camera and 3 D reconstruction with freehand SPECT from 15min after iv injection of 5mCi of 99mTc-MIBI. Both devices enabled the 2 adenomas to be detected intraoperatively, as well as checking activity of the excised gland and absence of significant uptake in surgical bed, with confirmation by intraoperative pre-postsurgical PTH levels, pathology and clinical follow-up for 10 months. Both devices accurately located the parathyroid adenomas intraoperatively, as well as provide confirmation of their extirpation, but freehand SPECT provided additional information of adenoma depth (mm) from the skin border, very useful for minimally invasive radio-guided surgery.

Keywords:
Intraoperative radio-guided detection
Radio-guided parathyroidectomy
Parathyroid adenoma
Freehand SPECT
Portable gamma-camera
Resumen

Presentamos nuestra experiencia inicial con freehand SPECT en la radiolocalización intraoperatoria del adenoma paratiroideo en 2 pacientes, uno de ellos mediastínico. Existe solo una publicación anterior de 3 pacientes con adenomas en localización paratiroidea habitual. Aportamos además por primera vez una valoración comparativa de resultados con gammacámara portátil en la misma intervención.

Se obtuvieron imágenes con gammacámara portátil y reconstrucción 3D con freehand SPECT en quirófano desde 15min tras administración iv de 5mCi de 99mTc-MIBI, localizándose los 2 adenomas con ambos equipos, comprobando la actividad de la pieza extirpada y ausencia de captación significativa en el lecho postexéresis, con confirmación mediante PTH intraoperatoria pre-y postextirpación, anatomía patológica y seguimiento clínico durante 10 meses. Aunque con ambos equipos se consiguió la localización intraoperatoria correcta de los adenomas paratiroideos y confirmación de su extirpación, freehand SPECT aportó adicionalmente la profundidad (mm) del adenoma respecto al borde cutáneo, muy útil en cirugía radioguiada mínimamente invasiva.

Palabras clave:
Radiolocalización intraoperatoria
Paratiroidectomía radioguiada
Adenoma paratiroideo
Freehand SPECT
Gammacámara portátil

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