Three-Year Survival in a Cohort of Women with Breast Cancer from an Insurance Company in Cali, 2017-2020 / SUPERVIVENCIA A TRES AÑOS EN UNA COHORTE DE MUJERES CON CÁNCER DE MAMA DE UNA ASEGURADORA EN CALI 2017-2020

INTRODUCTION: Breast cancer, in particular, is a significant concern in public health due to its high mortality rate. This research focuses on understanding the factors related to the 3-year survival of women with breast cancer in Cali, contributing to addressing this health challenge. OBJECTIVE: To determine the socio-demographic, clinical, and healthcare-related factors associated with the 3-year survival of women with breast cancer affiliated with an insurance provider in Cali from 2017 to 2020. This study aims to generate scientific evidence for decision-making within the insurance provider and the region. METHODOLOGY: A study was conducted in women with breast cancer in Cali to identify factors linked to 3-year survival. Data from a cohort of women with breast cancer affiliated with an insurance provider were analyzed, applying inclusion and exclusion criteria. Socio-demographic, clinical, and healthcare-related factors were assessed. Data were collected from secondary sources and analyzed to determine variables associated with survival. Ethical and confidentiality considerations were adhered to throughout the process. RESULTS: The most significant finding of our study, based on a three-year follow-up of 140 women with breast cancer, is the alarming mortality rate of 21.4%. We emphasize the importance of diagnosing the disease at its early stages, which can make a difference in the survival and prognosis of patients. CONCLUSION: The study highlights the high vulnerability of the cohort of women with breast cancer affiliated with the insurance provider. Although a longer survival time was observed in certain groups, the mortality rate remains significant.

INTRODUCCIÓN: El cáncer de mama, en particular, es una preocupación significativa en la salud pública debido a su alta mortalidad. Esta investigación se centra en comprender los factores relacionados con la supervivencia a 3 años de mujeres con cáncer de mama en Cali, contribuyendo a abordar este desafío de salud. OBJETIVO: determinar los factores socio demográficos, clínicos y de atención en salud asociados a la supervivencia a 3 años de mujeres con cáncer de mama afiliadas a una aseguradora en Cali 2017-2020, generando evidencia científica para la toma de decisiones tanto en la aseguradora como en la región. METODOLOGIA: Se realizó un estudio en mujeres con cáncer de mama en Cali para identificar factores vinculados a la supervivencia a 3 años. Se analizaron datos de una cohorte de mujeres con cáncer de mama afiliadas a una aseguradora, aplicando criterios de inclusión y exclusión. Se evaluaron factores sociodemográficos, clínicos y de atención en salud. Los datos se recopilaron de fuentes secundarias y se analizaron para determinar las variables relacionadas con la supervivencia. Se cumplieron consideraciones éticas y de confidencialidad en el proceso. RESULTADOS: El hallazgo más significativo de nuestro estudio, basado en un seguimiento de tres años a 140 mujeres con cáncer de mama, es la alarmante tasa de mortalidad del 21.4%. Destacamos la importancia de diagnosticar la enfermedad en sus estadios iniciales, lo que puede marcar la diferencia en la supervivencia y el pronóstico de las pacientes. CONCLUSION: Estudio destaca la alta vulnerabilidad de la cohorte de mujeres con cáncer de mama afiliadas a la EAPB. Aunque se observó un mayor tiempo de supervivencia en ciertos grupos, la tasa de mortalidad sigue siendo significativa.

Long-term resistance to 5-fluorouracil promotes epithelial-mesenchymal transition, apoptosis evasion, autophagy, and reduced proliferation rate in colon cancer cells.

The drug, 5-fluorouracil (5FU) is a standard first-line treatment for colorectal cancer (CRC) patients. However, drug resistance acquisition remains an important challenge for effective clinical outcomes. Here, we established a long-term drug-resistant CRC model and explored the cellular events underlying 5FU resistance. We showed that 5FU-treated cells (HCT-116 5FUR) using a prolonged treatment protocol were significantly more resistant than parental cells. Likewise, cell viability and IC50 values were also observed to increase in HCT-116 5FUR cells when treated with increasing doses of oxaliplatin, indicating a cross-resistance mechanism to other cytotoxic agents. Moreover, HCT-116 5FUR cells exhibited metabolic and molecular changes, as evidenced by increased thymidylate synthase levels and upregulated mRNA levels of ABCB1. HCT-116 5FUR cells were able to overcome S phase arrest and evade apoptosis, as well as activate autophagy, as indicated by increased LC3B levels. Cells treated with low and high doses displayed epithelial-mesenchymal transition (EMT) features, as observed by decreased E-cadherin and claudin-3 levels, increased vimentin protein levels, and increased SLUG, ZEB2 and TWIST1 mRNA levels. Furthermore, HCT-116 5FUR cells displayed enhanced migration and invasion capabilities. Interestingly, we found that the 5FU drug-resistance gene signature is positively associated with the mesenchymal signature in CRC samples, and that ABCB1 and ZEB2 co-expressed at high levels could predict poor outcomes in CRC patients. Overall, the 5FU long-term drug-resistance model established here induced various cellular events, and highlighted the importance of further efforts to identify promising targets involved in more than one cellular event to successfully overcome drug-resistance.

Brain metabolic changes in patients with disseminated malignant melanoma under immunotherapy.

Although there is evidence that chemotherapy can have side effects on metabolism and brain function, there are few studies on the occurrence of these side effects with immunotherapy. The present study was conducted to assess whether brain metabolic changes occur in patients with malignant melanoma under immunotherapy. Thirty-nine patients after surgical intervention and with a diagnosis of malignant melanoma were retrospectively included and were divided into two groups: one group under the first-line therapy with anti-programmed cell death-1 ± anti-cytotoxic T lymphocyte antigen-4 monoclonal antibodies and the other group without any treatment after surgery, which served as a control. Basal and follow-up whole body and brain 2-[ 18 F]fluoro-2-deoxy-D-glucose ( 18 F]FDG) PET/computed tomography (CT) studies were performed. Changes in brain glucose metabolism after treatment initiation of the immunotherapy group were compared with the findings in the control group. In addition, longitudinal regression analysis to investigate whether the time under immunotherapy influenced the changes of brain metabolism was performed. None of the patients presented cognitive impairment or other neurological alterations between basal and follow-up brain [ 18 F]FDG PET/CT examinations. The statistical analysis revealed a significant relative SUV (SUVr)-loss in the left frontal region in patients of the immunotherapy group compared with the control group, with radjusted = -0.62 and P = 0.008. Severity of SUVr-loss was correlated with duration of treatment. Patients with disseminated malignant melanoma receiving immunotherapy may present a decrease of brain metabolism in the left frontal region, which is related with time-under-treatment, without any clinical evidence of neurological disorder.

Digital PET vs Analog PET: Clinical Implications?

Positron emission tomography (PET) is a functional imaging technique introduced in 1970s. Over the years, PET was used alone but is in 2000 when the first hybrid PET/CT device was clinically introduced. Since then, PET has continuously been marked by technological developments, being the most recent one the introduction of silicon photomultipliers (SiPMs) as an alternative to standard photomultiplier tubes used in analog PET/CT systems. SiPMs, the basis for the so called digital PET/CT systems, are smaller than standard photomultiplier tubes (enabling higher spatial resolution) and provide up to 100% coverage of the crystal area, as well as high sensitivity, low noise, and fast timing resolution. SiPMs in combination with optimized acquisition and reconstruction parameters improve the localization of the annihilation events, provide high definition PET images, and offer higher sensitivity and higher diagnostic performance. This article summarizes the evidence about the superior performance of the state of the art digital PET and highlights its potential clinical implications. Digital PET opens new perspectives in the quantification and characterization of small lesions, which are mostly undetectable using analog PET systems, potentially changing patient management and improving outcomes in oncological and non-oncological diseases. Moreover, digital PET offers the possibility to reduce radiation dose and scan times which may facilitate the implementation of PET to address unmet clinical needs.

"The added value of 18f-FDG PET/CT in the assessment of onset and steroid resistant polimyalgia rheumatica".

PMR is a common inflammatory rheumatic disease. Although its clinical characteristics are fully recognized, no specific test for its diagnosis has been established to date. Several studies have described a wide variety of diseases that present with polymyalgic symptoms. A 18FDG-PET/CT scan could help to deal with these differential diagnoses. The goal of our study is to describe the findings of the 18FDG-PET/CT scan in a cohort of PMR patients and to detail how the 18FDG-PET/CT scan improves accuracy when diagnosing other underlying conditions. This cross-sectional study enrolled patients with a diagnosis of PMR who underwent to a 18FDG-PET/CT scan to rule out other diagnosis. The 18FDG-PET/CT scan was performed either following clinical criteria at the onset of clinical symptoms or when the patient became PMR steroid resistant. Patients' demographic, clinical and analytical data at the moment of the 18FDG-PET/CT scan were recorded. The final diagnosis was confirmed according to clinical judgement. A total of 103 patients with PMR were included. In 49.51% of patients, the 18FDG-PET/CT scan was ordered to study resistance to steroid therapy. The final diagnoses of patients were PMR in 70.9% patients, large vessel vasculitis in 15.5%, neoplasms 4.8% and another diagnosis in the rest. The 18FDG-PET/CT scan is a very useful technique for the study of Polymyalgia Rheumatica, not only to help in the diagnostic process, but also due to its role in the identification of a variety of PMR-like patrons.

Frecuencia de conductas autolesivas y factores asociados en adolescentes escolarizados de Manizales Colombia / Frequency of self-injurious behaviors and associated factors in school adolescents from Manizales, Colombia

Objetivo: esta investigación pretende determinar la frecuencia de conductas autolesivas en una muestra de estudiantes de un colegio de Manizales (Caldas, Colombia). En las últimas dos décadas las conductas autolesivas han aumentado significativamente en la población adolescente. Materiales y métodos: se empleó una muestra por conveniencia de 58 estudiantes (de una población de 538). Se cuantificaron variables demográficas, la frecuencia de conductas autolesivas, factores de riesgo, y se cuantificaron mediante escalas la satisfacción familiar, ansiedad y depresión y acoso escolar (bullying). Resultados: se encontró que una proporción de 22,4% presentaban conductas autolesivas (auto corte, auto golpearse, auto arañarse, intoxicación, arrancarse el cabello, auto quemarse), 10,3% consumo de sustancias psicoactivas, 36,4% consumo de bebidas alcohólicas, 50% probable ansiedad, 56,9% probable depresión. 66,95% de satisfacción familiar. Como factores asociados a autolesiones se encontraron ansiedad, depresión, orientación sexual, consumo de sustancias psicoactivas, bebidas alcohólicas e intento de suicidio en los últimos dos años. Conclusiones: la prevalencia de conductas autolesivas y los factores asociados a estas conductas en esta población es similar a lo reportado en el país y en el mundo, situación que llama la atención, más si se tiene en cuenta que es un importante predictor de suicidio; por tanto, es urgente que las autoridades competentes de la ciudad desarrollen e implementes intervenciones educativas dirigidas a reducir los factores de riesgo de CA, y así, contribuir a la disminución potencial de las tasas de suicidio en Manizales..(Au)

Objective: this research aims to determine the frequency of self-injurious behaviors in a sample of students from a school in Manizales (Caldas, Colombia). In the last two decades, self-injurious behaviors have increased significantly in the adolescent population. Materials and methods: a convenience sample of 58 students (from a population of 538) was used. Demographic variables, the frequency of self-injurious behavior, risk factors were quantified, and family satisfaction, anxiety and depression, and bullying were quantified using scales. Results: it was found that a proportion of 22.4% had self-injurious behaviors (self-cutting, self-hitting, self-scratching, intoxication, hair pulling, self-burning), 10.3% consumption of psychoactive substances, 36.4% consumption of alcoholic beverages, 50% probable anxiety, 56.9% probable depression. 66.95 family satisfaction. As factors associated with self-harm, anxiety, depression, sexual orientation, consumption of psychoactive substances, alcoholic beverages and attempted suicide in the last two year were found. Conclusions: a frequency of self-harm was determined in this population, and associated factors similar to that found in other student populations nationally and internationally. It was determined that this phenomenon of global importance is also present, to a considerable extent, in young students from Manizales city (Colombia)..(Au)

Extrastriatal SPECT-DAT uptake correlates with clinical and biological features of de novo Parkinson's disease.

Striatal dopamine transporter (DAT) uptake assessment through I123-Ioflupane Single-Pphoton Emission Computed Tomography (SPECT) provides valuable information about the dopaminergic denervation occurring in Parkinson's disease (PD). However, little is known about the clinical or biological relevance of extrastriatal DAT uptake in PD. Here, from the Parkinson's Progression Markers Initiative, we studied 623 participants (431 PD and 192 healthy controls) with available SPECT data. Even though striatal denervation was undoubtedly the imaging hallmark of PD, extrastriatal DAT uptake was also reduced in patients with PD. Topographically, widespread frontal but also temporal and posterior cortical regions showed lower DAT uptake in PD patients with respect to healthy controls. Importantly, a longitudinal voxelwise analysis confirmed an active one-year loss of extrastriatal DAT uptake within the PD group. Extrastriatal DAT uptake also correlated with the severity of motor symptoms, cognitive performance, and cerebrospinal fluid α-synuclein levels. In addition, we found an association between the Catechol-O-methyltransferase val158met genotype and extrastriatal DAT uptake. These results highlight the clinical and biological relevance of extrastriatal SPECT-DAT uptake in PD.

Digital versus analog PET/CT in patients with known or suspected liver metastases.

AIM: To assess if digital PET/CT improves liver lesion detectability compared to analog PET/CT in patients with known or suspected liver metastases. MATERIALS AND METHODS: We prospectively included 83 cancer patients, with one or more of these conditions: history of liver metastases, clinical risk of having liver metastases or presence of suspected liver metastases on the first of the two PET/CTs. All patients were consecutively scanned on each PET/CT on the same day after a single [18F]fluorodeoxyglucose dose injection. The order of acquisition was randomly assigned. Three nuclear medicine physicians assessed both PET/CTs by counting the foci of high uptake suspicious of liver metastases. Findings were correlated with appropriate reference standards; 19 patients were excluded from the analysis due to insufficient lesion nature confirmation. The final sample consisted of 64 patients (34 women, mean age 68 ± 12 years). RESULTS: As per-patient analysis, the mean number of liver lesions detected by the digital PET/CT (3.84 ± 4.25) was significantly higher than that detected by the analog PET/CT (2.91 ± 3.31); P < 0.001. Fifty-five patients had a positive PET/CT study for liver lesions. In 26/55 patients (47%), the digital PET/CT detected more lesions; 7/26 patients (27%) had detectable lesions only by the digital system and had <10 mm of diameter. Twenty-nine patients had the same number of liver lesions detected by both systems. In nine patients both PET/CT systems were negative for liver lesions. CONCLUSION: Digital PET/CT offers improved detectability of liver lesions over the analog PET/CT in patients with known or suspected liver metastases.

Identificación de adenomas ocultos en hiperparatiroidismo primario con PET-TC 18F-fluorocolina / Identification of Occult Adenomas in Primary Hyperparathyroidism With 18F-fluorocholine PET/CT

INTRODUCCIÓN: La principal causa de hiperparatiroidismo primario en nuestro medio es el adenoma paratiroideo único. La paratiroidectomía se considera el único tratamiento potencialmente curativo y requiere de estudios de imagen de localización preoperatorios para un abordaje quirúrgico dirigido. En pacientes con negatividad en pruebas convencionales, la PET-TC colina ha demostrado tasas de sensibilidad superiores respecto al gold-standard. MÉTODOS: Se diseñó un estudio de cohortes prospectivo que incluyó a 34 pacientes con diagnóstico de hiperparatiroidismo primario entre 2017 y 2019, candidatos a cirugía con pruebas de imagen con gammagrafía y SPECT-TC MIBI negativas. A todos se les realizó una PET-TC con 18F-fluorocolina. Los resultados se compararon con un grupo control de 30 pacientes con pruebas convencionales positivas intervenidos en el mismo período. RESULTADOS: La PET-TC colina detectó tejido paratiroideo hiperfuncionante en el 85% de los pacientes con gammagrafía previa negativa. Se realizó resección selectiva del adenoma identificado en estos pacientes, con criterio de curación en el 87% de los casos, sin precisar de exploración cervical bilateral. Los niveles de PTH, calcemia y el peso glandular fueron significativamente menores en este grupo con respecto al control. No se identificaron diferencias respecto al criterio de curación ni a la vía de abordaje en ambos grupos. CONCLUSIÓN: En nuestro estudio, la PET-TC colina demostró tasas superiores de detección que permitieron aumentar el número de pacientes candidatos a cirugía dirigida con disminución de la morbilidad quirúrgica, especialmente en grupos con adenomas de menor tamaño asociados a niveles más bajos de calcemia y PTH preoperatorias y en pacientes con cirugías cervicales previas

INTRODUCTION: Single parathyroid adenomas are the most common cause of primary hyperparathyroidism (PHP) in our population. Parathyroidectomy is still the only potentially curative treatment and requires preoperative localization imaging studies to perform selective surgery. In patients with negative results on conventional tests, PET/CT has demonstrated higher sensitivity rates. METHODS: A prospective cohort study was designed, including 34 patients diagnosed with PHP between 2017 and 2019, candidates for surgery with negative preoperative localization tests with scintigraphy and MIBI SPECT/CT. All patients underwent PET/CT with 18F-Fluorocholine. The clinical, biochemical and postoperative outcome results were compared with a control group of 30 patients with positive standard tests. RESULTS: Hyperfunctional parathyroid tissue was detected in 85% of the patients that had undergone choline PET/CT. The selective resection of the adenoma identified in these patients achieved curative criteria in 87% of the cases without undergoing bilateral cervical surgical exploration. The preoperative levels of PTH, calcemia and gland weight were significantly lower in this group compared to the control group. No differences were identified in cure criteria or approach between the 2 groups. CONCLUSION: In our study, choline PET/CT showed higher detection rates compared to the gold standard. The increase provides the opportunity to perform unilateral selected adenoma resection, especially in patients with smaller adenomas associated with lower calcemia and PTH levels and patients with previous cervical surgery

Dieta de la lagartija neotropical Liolaemus polystictus(Squamata: Liolaemidae) de los andes centrales,Huancavelica, Perú / Diet of the neotropical lizard Liolaemus polystictus (Squamata:Liolaemidae) from the central Andes, Huancavelica, Peru

Resumen En este estudio se investigó la dieta de la lagartija neotropical Liolaemus polystictus en la región Huancavelica en los Andes centrales del Perú. Los ítems de la dieta fueron identificados en los contenidos estomacales de 54 muestras. El porcentaje de contenido volumétrico vegetal fue mayor al animal (V% contenido animal= 22.97 y V% contenido vegetal= 77.03), siendo el contenido animal representado por los artrópodos y con diez ítems alimentarios. Considerando solo el contenido animal, los coleópteros fueron los más representativos (N%= 32.05, FO=59.26 y V%= 41.36). Ninguna categoría animal mostró valores de IRI altos para ser considerados fundamentales, asimismo la selección de presas no mostro diferencias significativas entre machos, hembras y juveniles, ni entre los contenidos volumétricos vegetales entre adultos y juveniles, pero sí en los contenidos volumétricos vegetales entre machos y hembras. Se encontraron diferencias significativas entre la longitud, ancho y volumen de la presa y el ancho de la cabeza (AC) en machos de L. polystictus. Finalmente, proponemos la categoría de herbívoro para la especie L. polystictus, lo cual elevaría a ocho las especies del grupo L. montanus que se alimentan principalmente de vegetación.

Abstract This study assessed the diet of the Neotropical lizard Liolaemus polystictus from Huancavelica region in the Peruvian central Andes. The diet composition was identified from 54 sample stomach contents. Percentage of vegetable content was higher than the animal one (V% animal content= 22.97 and V% vegetable content= 77.03), and arthropods were the highest animal content with ten foods items. Within the animal content, Coleoptera were the most representative (N%= 32.05, FO= 59.26 and V%= 41.36%). No animal category showed high IRI values to be considered fundamental. There were not significant differences on prey selection between males, females and juveniles, and on vegetal volumetric contents between adults and juveniles. However, vegetal volumetric contents were significantly different between males and females. Significant differences were found between prey length, width and volume and L. polystictus male head width (AC). Finally, we pro-pose L. polystictus to be considered an herbivorous species, which bring to eight the number of species in the L. montanus group that feed mainly on vegetation.

Future Challenges of Multimodality Imaging.

During the last decade, positron emission tomography/computed tomography (PET/CT) and single-photon emission computed tomography/computed tomography (SPECT/CT) have procured advances in research and clinical application of fusion imaging. The recent introduction of digital PET/CT opens new horizons for multimodality molecular imaging. This system offers more precise, simultaneous morphologic, functional, and molecular information of a living system. Moreover, other combinations of anatomic and functional imaging modalities hold promise in basic medical research or in clinical medicine. These developments are paralleled by advances in the field of biomolecules and particles that will provide new agents useful for more than one imaging modality and will facilitate the study of the same target by different imaging devices. Digital PET/CT may emerge as a powerful multimodality technique with great clinical impact on the diagnosis and therapy assessment of oncological diseases due to its enhanced sensitivity.

Correction to: Superior performance of 18F-fluorocholine digital PET/CT in the detection of parathyroid adenomas.

The correct administered activity of 18F-FCH is 0.1-0.14 mCi/Kg, which is equivalent to 3.7-5.2 MBq/kg.

The Added Value of Tau-PET in the Assessment of Progressive Supranuclear Palsy.

Progressive supranuclear palsy (PSP) is rare neurodegenerative disorder characterized by deposition of fibrillar aggregates of 4R tau-protein in neurons and glial cells. This disorder is underdiagnosed due to the overlap of the clinical syndrome with other related conditions. The clinical manifestations include cognitive impairment associated with behavioral changes, akinetic rigid syndrome, and prominent oculomotor dysfunction. We present the F-FDG and F-THK5351 PET images of a 71-year-old man diagnosed of probable PSP. This image highlights the hopeful results of the new tau-PET ligands radiotracers, because it allows to assess the distribution of tau-protein over time, closely associated with neurodegeneration in PSP.

Identification of Occult Adenomas in Primary Hyperparathyroidism With 18F-fluorocholine PET/CT. / Identificación de adenomas ocultos en hiperparatiroidismo primario con PET-TC 18F-fluorocolina.

INTRODUCTION: Single parathyroid adenomas are the most common cause of primary hyperparathyroidism (PHP) in our population. Parathyroidectomy is still the only potentially curative treatment and requires preoperative localization imaging studies to perform selective surgery. In patients with negative results on conventional tests, PET/CT has demonstrated higher sensitivity rates. METHODS: A prospective cohort study was designed, including 34 patients diagnosed with PHP between 2017 and 2019, candidates for surgery with negative preoperative localization tests with scintigraphy and MIBI SPECT/CT. All patients underwent PET/CT with 18F-Fluorocholine. The clinical, biochemical and postoperative outcome results were compared with a control group of 30 patients with positive standard tests. RESULTS: Hyperfunctional parathyroid tissue was detected in 85% of the patients that had undergone choline PET/CT. The selective resection of the adenoma identified in these patients achieved curative criteria in 87% of the cases without undergoing bilateral cervical surgical exploration. The preoperative levels of PTH, calcemia and gland weight were significantly lower in this group compared to the control group. No differences were identified in cure criteria or approach between the 2groups. CONCLUSION: In our study, choline PET/CT showed higher detection rates compared to the gold standard. The increase provides the opportunity to perform unilateral selected adenoma resection, especially in patients with smaller adenomas associated with lower calcemia and PTH levels and patients with previous cervical surgery.

Superior performance of 18F-fluorocholine digital PET/CT in the detection of parathyroid adenomas.

OBJECTIVE: To compare detectability of hyperfunctioning parathyroid tissue (HPT) by digital and analog 18F-fluorocholine PET/CT in patients with primary hyperparathyroidism and negative/inconclusive 99mTc-MIBI scintigraphy-SPECT/CT. MATERIALS AND METHODS: Thirty-three patients with primary hyperparathyroidism and negative/inconclusive 99mTc-MIBI scintigraphy-SPECT/CT were prospectively included. All patients accepted to be scanned by digital and analog PET/CT in the same imaging session after a single injection of 18F-fluorocholine. Three nuclear medicine physicians evaluated the digital and analog PET/CT datasets to assess the detection rate of HPT. Maximum standard uptake values (SUVmax) of HPT and locoregional lymph nodes were measured in both systems. RESULTS: HPT was detected in 30/33 patients by the digital system, whereas it was detected in 22/33 patients by the analog system (p < 0.01). Moreover, in 21 of these 33 patients, both systems detected one focal 18F-fluorocholine uptake, and in one patient the digital system detected two foci. Histopathology demonstrated HPT in 32 patients and it was inconclusive in one patient. The digital PET/CT detected HPT in 29 of the 32 patients, and the analog system in 22 of the 32 (p < 0.01). All HPT suspected lesions resected and detected only by the digital system (n = 8) were < 10 mm (7.5 ± 1.3 mm), while those detected by both systems (n = 22) were > 10 mm (13 ± 3.8 mm). SUVmax of HPT lesions was significantly higher than SUVmax of locoregional lymph node independently of the PET/CT system used (4.5 ± 1.9 vs. 2.9 ± 1.3, p < 0.0001). CONCLUSIONS: Digital PET/CT offers superior performance over analog system in patients with suspected HPT and previous negative/inconclusive imaging examinations, particularly in sub-centimeter lesions. SUVmax can help in the differentiation between HTP and locoregional lymph nodes.

Correction to: Digital vs. analog PET/CT: intra-subject comparison of the SUVmax in target lesions and reference regions.

The article Digital vs. analog PET/CT: intra-subject comparison of the SUVmax in target lesions and reference regions, written by Francisco Fuentes-Ocampo, Diego Alfonso López-Mora, Albert Flotats, Gabriela Paillahueque.