Abstract
Ten patients with medullary thyroid carcinoma (MTC) and 2 patients with papillary carcinoma of the thyroid were investigated by scintigraphy using99mTc(V)-dimercaptosuccinic acid [99mTc(V)-DMS], a new radiopharmaceutical agent for imaging MTC. At surgery, a tracer dose of the agent was administered intravenously, and the distribution of the agent was studied in the surgically removed tissues. Among the patients with MTC, 7 had clear scintigraphic images of tumors, 2 had faint images, and 1 patient with a recurrent tumor in a lymph node had no significant image. In 3 patients, mediastinal involvements were clearly demonstrated, and mediastinal dissection confirmed the scintigraphic findings. No significant images were obtained in the patients with papillary carcinoma. The tissue distribution studies of99mTc(V)-DMS revealed specific accumulation of the agent in MTC tissue and low uptake in other tissues. This new scintigraphy for MTC is of great value in deciding the surgical approach and follow-up.
Résumé
Dix malades présentant un cancer médullaire thyroïdien et 2 malades un cancer papillaire ont été soumis à une scintigraphie employant un nouveau radioisotope le99mTc(V)-DMS. Au cours de l'intervention une dose traçante de ce nouvel agent fut injectée par voie intraveineuse pour permettre l'étude de sa répartition au niveau de la pièce opératiore. Parmi les malades atteints de cancer médullaire 7 sur 10 ont présenté des images scintigraphiques patentes, 2 des images estompées cependant qu'un malade qui était porteur d'une récidive au niveau d'un ganglion lymphatique ne présentait pas d'image significative. Chez 3 malades une diffusion médiastinale fut clairement démontrée et la dissection médiastinale vint confirmer les constatations scintigraphiques. En revanche aucune image ne fut observée chez les malades atteints de cancer papillaire. Les études de la distribution tissulaire du99mTC(V)-DMS démontrent une imprégnation spécifique importante du néoplasme médullaire par rapport aux autres tissus. Ce nouvel agent scintigraphique de dépistage du cancer médullaire thyroïdien est d'une grande valeur pour déterminer la conduite opératoire et pour suivre le malade après l'intervention.
Resumen
Diez pacientes con carcinoma medular de tiroides (CMT) y 2 pacientes con carcinoma papilar fueron investigados mediante centelleografía utilizando99mTc(V)-ácido dimercaptosuccínico, un nuevo agente radiofarmacéutico para imágenes de CMT. En el curso de la cirugía se administró una dosis trazadora del agente por vía intravenosa, y su distribución fue estudiada en los tejidos de la resección quirúrgica. Entre los pacientes con CMT, 7 presentaron imágenes claras de centelleografía del tumor, 2 presentaron imágenes débiles, y 1 paciente con tumor recurrente en un ganglio linfático no exhibió imagen de significación. En 3 pacientes la invasión mediastinal pudo ser claramente demostrada, y la disección mediastinal confirmó los hallazgos de la centelleografía. No se obtuvieron imágenes significativas en los pacientes con carcinoma papilar. Los estudios de distribución tisular del99mTc(V)-ADMS revelaron acumulación específica del agente en tejido de CMT y baja captación por otros tejidos. Este nuevo método de centelleografía para CMT es de gran valor para decidir sobre el aproche quirúrgico y para el seguimiento.
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Miyauchi, A., Endo, K., Ohta, H. et al. 99mTc(V)-dimercaptosuccinic acid scintigraphy for medullary thyroid carcinoma. World J. Surg. 10, 640–645 (1986). https://doi.org/10.1007/BF01655544
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DOI: https://doi.org/10.1007/BF01655544