ABSTRACT
OBJECTIVES: To evaluate the clinical efficacy of magnetic resonance-guided focused ultrasound surgery in a Mexican mestizo population. METHODS: This retrospective study included 159 women (mean age 37 ± 6.4 years, range 22-53 years) from 2008 to 2010. Two hundred sixty-eight symptomatic uterine fibroids were treated using MR-guided focused ultrasound surgery. Parameters included initial perfused volume, final perfused volume, non-perfused volume (NPV), and treated volume ratio (TVR). Follow-up up to 15 months assessed treatment efficacy and symptomatic relief. Non-parametric statistics and the Kaplan-Meier method were performed. RESULTS: T2-weighted hypointense fibroids showed a frequency of 93.6%; isointense and hyperintense fibroids had frequencies of 5.60 and 1.1%. There was a negative correlation between NPV and age (r = -0.083, p = 0.307) and treatment time (r = -0.253, p = 0.001). Median TVR was 96.0% in small fibroids and 76.5% in large fibroids. Involution of 50% and 80% was achieved at months 6-7 and month 11, respectively. Relief of symptoms was significant (p < 0.05). CONCLUSIONS: Our data show that higher TVR attained immediately post-treatment of MRgFUS favours higher involution percentages at follow-up; however, careful patient selection and use of pretreatment imaging are important components for predicting success using MR-guided focused ultrasound surgery. KEY POINTS: ⢠Type 1 fibroids were the most common (93.2%). ⢠Age and treated volume were not correlated (r s = -0.215, p = 0.165). ⢠Small fibroids achieved a higher treated volume than large (96.0% vs. 76.5%). ⢠A 50% involution was achieved at 6-month follow-up for type-1 fibroid. ⢠A decrease of 80% was reached at 11 months for type-1 fibroids.
Subject(s)
High-Intensity Focused Ultrasound Ablation/methods , Leiomyoma/therapy , Uterine Neoplasms/therapy , Adult , Female , Follow-Up Studies , Humans , Leiomyoma/diagnosis , Magnetic Resonance Imaging, Interventional/methods , Middle Aged , Patient Selection , Perfusion/methods , Retrospective Studies , Surveys and Questionnaires , Treatment Outcome , Uterine Neoplasms/diagnosis , Young AdultABSTRACT
Resumen: Las técnicas de imaginología molecular evalúan los procesos metabólicos intracelulares; en la actualidad, son una herramienta eficaz para el diagnóstico oncológico. La técnica más importante y utilizada es la PET-CT (tomografía por emisión de positrones y tomografía computarizada), en la cual, la PET permite obtener una imagen metabólica del tumor, de forma que se determina su viabilidad, mientras que la tomografía computarizada permite la localización anatómica exacta de la lesión. Es así, como la PET-CT es una prueba con un gran desempeño diagnóstico en oncología, permitiendo el diagnóstico temprano, la estadificación y la evaluación de la respuesta a la terapia de pacientes con neoplasias. Este artículo de revisión tiene como objetivo describir las bases técnicas y biológicas de la PET-CT, y su uso racional en oncología, en especial al momento de contribuir en la fase de diagnóstico primario de la neoplasia y en la estadificación de la enfermedad.
Abstract: Molecular imaging techniques evaluate intracellular metabolic processes; currently, these techniques are an effective tool for cancer diagnosis. The most important and widely used technique is PET-CT (positron-emission tomography and computed tomography), wherein PET obtains a metabolic image of the tumor, a way as to determine its viability, while CT enables an accurate anatomical location of the lesion. Hence, PET-CT is a test with high diagnostic performance in oncology, allowing early detection, staging and assessment of response to therapy in patients with malignancies. This review article aims to describe the technical and biological fundamentals of PET-CT, and its rational use in oncologic practice, especially during early detection of cancer and staging of the disease.
