Prevalence and variables associated with solitary pulmonary nodules in a routine clinic-based population: a cross-sectional study.

OBJECTIVE: To determine the prevalence of solitary pulmonary nodules (SPNs) in chest radiology studies and patient's features associated with malignancy in a non-high-risk clinical population. METHODS: Patients ≥35 years were referred for thoracic imaging in two hospitals (2010-2011). Eight radiologists determined the presence and characteristics of SPN. Selected variables were collected from radiological register and medical records. Observer agreement in the diagnosis of SPN was assessed. RESULTS: 25,529 patients were included: 23,102 (90.5%) underwent chest radiograph and 2,497 (9.5%) a CT. The prevalence of SPN was 2.1% (95% CI 1.9 - 2.3) in radiographs and 17.0% (95% CI 15.5 - 18.5) in CT. In patients undergoing chest radiograph, detection of SPN with an irregular border was more frequent among smokers. In patients who had a CT, larger SPNs appeared to be associated with 60 years of age or over, diagnosis of a respiratory illness, or male gender. In addition, an irregular border was also more common among men. CONCLUSIONS: The prevalence of SPNs detected by both radiograph and CT was lower than that shown in screening studies. Patient characteristics such as age, sex, respiratory disease, or smoking habit were associated with nodule characteristics that are known to be related with malignancy. KEY POINTS: There is a lower SPN prevalence in the clinical population than in screening studies. SPN prevalence is associated with some patient characteristics: sex, age, imaging test. Nodule characteristics related to malignancy were associated with some patient characteristics.

Visualización por resonancia magnética del drenaje venoso en las masas pélvicas: una ayuda para filiar su origen / MRI visualization of venous drainage helps determine the origin of pelvic masses

Objetivo Evaluar la utilidad de la detección en la resonancia magnética (RM) de un pedículo vascular ovárico y de la presencia de vasos prominentes entre el útero y las tumoraciones de gran tamaño como signos para filiar el origen de las masas en el ovario o el útero, respectivamente. Material y métodos Se revisan los estudios de RM de 80 pacientes con masas pélvicas >7cm y confirmadas histológicamente. Se valoró la presencia de venas gonadales que drenaran las tumoraciones y la presencia de vasos interpuestos entre la superficie de la lesión y el útero. Resultados Se detectaron venas gonadales que drenaban las masas pélvicas en 36 de las 43 tumoraciones de origen ovárico (84%), mientras que en 30 de las 37 tumoraciones de origen uterino se demostraron vasos interpuestos entre ellas y el útero (81%). La sensibilidad, especificidad, valores predictivos positivo y negativo de los signos de presencia de vasos gonadales drenando la lesión fueron del 84, 95, 95 y 83% para masas ováricas, y del 81, 91, 88 y 85% para los vasos interpuestos entre el útero y la masa en los miomas subserosos, respectivamente. ConclusiónLa valoración del drenaje venoso de tumoraciones pélvicas resulta de gran utilidad cuando el origen de las tumoraciones no resulta fácil de establecer (AU)

Objective To evaluate the usefulness of detecting at MRI an ovarian vascular pedicle or prominent vessels between the uterus and large tumors for determining whether masses originate in the ovary or uterus. Material and methods We reviewed MRI studies from 80 patients with histologically confirmed pelvic masses greater than 7cm in diameter. We evaluated the presence of gonadal veins draining the tumors and the presence of vessels between the surface of the lesion and the uterus. ResultsWe detected gonadal veins draining the pelvic masses in 36 of the 43 tumors originating in the ovaries (84%); we detected vessels between the uterus and the pelvic mass in 30 of the 37 tumors that originated in the uterus (81%). The sensitivity, specificity, and positive and negative predictive values for the presence of gonadal veins draining the lesion were 84%, 95%, 95%, and 83%, respectively, for ovarian masses, and 81%, 91%, 88%, and 85%, respectively, for vessels between the uterus and the mass in subserous myomas. Conclusion Evaluating the venous drainage of pelvic tumors is very useful in cases in which it is not easy to establish the origin of the tumor (AU)

[MRI visualization of venous drainage helps determine the origin of pelvic masses.]. / Visualización por resonancia magnética del drenaje venoso en las masas pélvicas: una ayuda para filiar su origen.

OBJECTIVE: To evaluate the usefulness of detecting at MRI an ovarian vascular pedicle or prominent vessels between the uterus and large tumors for determining whether masses originate in the ovary or uterus. MATERIAL AND METHODS: We reviewed MRI studies from 80 patients with histologically confirmed pelvic masses greater than 7cm in diameter. We evaluated the presence of gonadal veins draining the tumors and the presence of vessels between the surface of the lesion and the uterus. RESULTS: We detected gonadal veins draining the pelvic masses in 36 of the 43 tumors originating in the ovaries (84%); we detected vessels between the uterus and the pelvic mass in 30 of the 37 tumors that originated in the uterus (81%). The sensitivity, specificity, and positive and negative predictive values for the presence of gonadal veins draining the lesion were 84%, 95%, 95%, and 83%, respectively, for ovarian masses, and 81%, 91%, 88%, and 85%, respectively, for vessels between the uterus and the mass in subserous myomas. CONCLUSION: Evaluating the venous drainage of pelvic tumors is very useful in cases in which it is not easy to establish the origin of the tumor.