[PMID]: | 28462719 |
[Au] Autor: | Hung TJ; Burrage J; Bourke A; Taylor D |
[Ad] Endereço: | Department of Nuclear Medicine, Royal Perth Hospital, Perth. Australia. |
[Ti] Título: | Intraoperative Localisation of Impalpable Breast Lesions Utilising the ROLLIS Technique Following Peritumoral 99mTc-colloid Sentinel Node Lymphoscintigraphy. |
[So] Source: | Curr Radiopharm;10(2):111-114, 2017 Aug 24. |
[Is] ISSN: | 1874-4729 |
[Cp] País de publicação: | United Arab Emirates |
[La] Idioma: | eng |
[Ab] Resumo: | BACKGROUND: Ultrasound or stereotactic guided hook-wire localisation has been the standard-of-care for the pre-surgical localisation of impalpable breast lesions, which account for approximately a third of all breast cancer. Radioguided occult lesion localisation using I-125 seeds (ROLLIS) is a relatively new technique for guiding surgical excision of impalpable breast lesions, and is a promising alternative to the traditional hook-wire method. When combined with Tc-99m labelled colloid for sentinel node mapping in clinically indicated cases, there has been uncertainty regarding whether the downscatter of Tc-99m into the I-125 energy spectrum could adversely affect the intra-operative detection of the I-125 seed, especially pertaining to a peritumoral injection. OBJECTIVE: To evaluate the percentage contribution of downscattered activity from Tc-99m into the I-125 energy spectrum in simulated intra-operative resections of an I-125 seed following different sentinel node injection techniques. METHOD: Two scenarios were simulated using breast phantoms with lean chicken breast. The first scenario, with a 2cm distance between the Tc-99m injection site and the I-125 seed, simulated a periareolar ipsiquadrant injection with the subdermal or intradermal technique. The second scenario simulated a peritumoral injection technique with the Tc-99m bolus and an I-125 seed at the same site. Count rates were acquired with a hand-held gamma probe, and the percentage contribution of downscattered Tc-99m gamma photons to the I-125 energy window was calculated. RESULTS: In scenarios one and two, downscattered Tc-99m activity contributed 0.5% and 33% respectively to the detected count rate in the I-125 energy window. In both scenarios, the I-125 seed was successfully localised and removed using the gamma probe. CONCLUSION: There is no significant contribution of downscattered activity associated with a peritumoral injection of Tc-99m to adversely affect the accurate intra-operative localisation of an I- 125 seed. |
[Mh] Termos MeSH primário: |
Neoplasias da Mama/diagnóstico por imagem Neoplasias da Mama/cirurgia Linfocintigrafia Cintilografia/métodos
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[Mh] Termos MeSH secundário: |
Neoplasias da Mama/patologia Marcadores Fiduciais Período Intraoperatório Radioisótopos do Iodo Metástase Linfática/diagnóstico por imagem Imagens de Fantasmas Compostos Radiofarmacêuticos Espalhamento de Radiação Sensibilidade e Especificidade Pertecnetato Tc 99m de Sódio Agregado de Albumina Marcado com Tecnécio Tc 99m Resultado do Tratamento
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[Pt] Tipo de publicação: | JOURNAL ARTICLE |
[Nm] Nome de substância:
| 0 (Iodine Radioisotopes); 0 (Iodine-125); 0 (Radiopharmaceuticals); 0 (Technetium Tc 99m Aggregated Albumin); 0 (technetium Tc 99m nanocolloid); A0730CX801 (Sodium Pertechnetate Tc 99m) |
[Em] Mês de entrada: | 1802 |
[Cu] Atualização por classe: | 180215 |
[Lr] Data última revisão:
| 180215 |
[Sb] Subgrupo de revista: | IM |
[Da] Data de entrada para processamento: | 170503 |
[St] Status: | MEDLINE |
[do] DOI: | 10.2174/1874471010666170428113052 |
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