OBJECTIVE: To identify the main sources of information on breast cancer used by women; to determine whether there is an association between the use of specific sources and the education level or income of these women; to determine how women evaluate their own knowledge about breast cancer (self-evaluation); to determine whether this self-evaluation has affected the habit of doing breast self-examination. MATERIALS AND METHODS: Five hundred and thirty-one women, aged 20 years or older, were randomly interviewed in a private hospital in Goiânia, GO, Brazil. RESULTS: Television was pointed out as the main source of information on breast cancer (26.5%) regardless of education level or income, followed by magazines (16.8%), talking to other people (16.2%), physicians (15.8%), newspapers (12.2%), radio (8.4%) and internet (3.9%). A chi-square test indicated association between the four most used sources of information on breast cancer and the education level and family income. CONCLUSION: Interviewed women pointed out television as their main source of information on breast cancer. Eighty-three percent of the women deemed to have average or good knowledge about breast cancer. Women who considered themselves as having good knowledge about breast cancer were more prone to perform breast self-examination at appropriate intervals.

Keywords: Breast neoplasms, Detection, Screening

We present a case of a 27-year-old male patient submitted to computed tomography and magnetic resonance imaging for the evaluation of a renal tumor. The radiological features of the mass suggested the diagnosis of a malignant renal tumor of parenchymatous origin. However, the histological findings proved to be a benign solitary fibrous tumor within the pelvis and caliceal portion of the right kidney.

Keywords: Neoplasia, Fibrous tumor, Kidney, Mesothelioma, Computed tomography, Magnetic resonance imaging

The Breast Imaging Reporting and Data System (BI-RADS™) from the American College of Radiology is a system designed to standardize mammographic reporting, reduce confounding factors in breast imaging interpretation, and to simplify the management of the final result. OBJECTIVE: To identify how the system is being used, providing information to help the Brazilian College of Radiology to develop strategies to improve its use. MATERIALS AND METHODS: Data were collected in the City of Goiânia, GO, Brazil. Each woman submitted to the examination in the service between January and June, 2003 was asked to provide previous reports and films. Examinations performed between 1/7/2001 and 30/6/2003 were included in the analysis. RESULTS: A total of 104 previous reports done by 40 radiologists from 33 different services were collected for analysis; 77% (n = 80) used the BI-RADS™. From these, only 15% (n = 12) were concise, none followed the recommendations suggested by the system, 98.75% (n = 79) were not in conformity with the lexicon terminology and in 65% (n = 51) there was no reference to pertinent recommendations. CONCLUSION: Although largely used, BI-RADS™ was not recognized as a system designed to standardize the reports and it was used almost exclusively to a final categorization of the exams.

Keywords: Mammography, Breast neoplasms, Detection

The melanotic neuroectodermal tumor of infancy, also known as progonoma, is a rare benign disease of neural crest origin that occurs within the first year of life and affects mainly the maxilla. The authors report a case of a 10-month-old child presenting with this uncommon tumor in the maxilla, emphasizing the diagnostic findings on computed tomography, and present a literature review.

Keywords: Neoplasia, Neural crest, Maxilla, Infancy, Computed tomography

Fibrolamellar hepatocarcinoma is a rare neoplasm diagnosed by computed tomography and confirmed by anatomopathological examination. We report a case of a patient admitted at Hospital Mater Dei in Belo Horizonte, MG, Brazil, due to fibrolamellar hepatocarcinoma, and discuss the clinical, radiological and pathological features of this disease. The conclusions reinforce the importance of radiological imaging for the detection and characterization of hepatic focal neoplasms.

Keywords: Liver neoplasms, Computed tomography diagnosis

PURPOSE: To report the initial clinical experience after the treatment of 100 women suffering of symptomatic fibroids who were submitted to uterine artery embolization as the main form of treatment. We also present an extensive review of literature on the subject in order to determine the indications and contra-indications, and the possible complications of this method.
MATERIAL AND METHOD: One hundred patients with symptomatic fibroids were submitted to uterine artery embolization as the main form of treatment. The main symptoms that justified the intervention were increased menstrual flow in 79 patients and pain related to the fibroids in 21 patients. Diagnosis was made using ultrasound alone in 75 patients and ultrasound and magnetic resonance imaging in 25 patients. The mean uterine volume measured using these imaging methods was 487cm³. The procedure was performed in two Institutions: 56 procedures in a public Institution in patients attended by the public health system, and 46 patients with health insurance treated in a private clinic. Seventy-six patients were followed clinically during 12 weeks after uterine embolization.
RESULTS: The procedure was done with success in 97% of cases using a conventional technique. Clinical follow-up after 12 weeks showed symptomatic improvement in over 90% of the patients. Reductions of the uterine volume of up to 52% were also observed. No relevant technical and/or clinical complications were seen.
CONCLUSION: Uterine artery embolization for the treatment of symptomatic fibroids is a simple, efficient and safe procedure.

Keywords: Fibroids; Uterine embolization; Gynecologic neoplasm; Menorrhagia.

In the investigation of tumors with conventional magnetic resonance imaging, both quantitative characteristics, such as size, edema, necrosis, and presence of metastases, and qualitative characteristics, such as contrast enhancement degree, are taken into consideration. However, changes in cell metabolism and tissue physiology which precede morphological changes cannot be detected by the conventional technique. The development of new magnetic resonance imaging techniques has enabled the functional assessment of the structures in order to obtain information on the different physiological processes of the tumor microenvironment, such as oxygenation levels, cellularity and vascularity. The detailed morphological study in association with the new functional imaging techniques allows for an appropriate approach to cancer patients, including the phases of diagnosis, staging, response evaluation and follow-up, with a positive impact on their quality of life and survival rate.

Keywords: Cancer imaging; Magnetic resonance imaging; Oncology; Neoplasia; Functional imaging; Diffusion.

The present essay is illustrated with magnetic resonance images obtained at the authors' institution over the past 15 years and discusses the main imaging findings of intraventricular tumor-like lesions (ependymoma, pilocytic astrocytoma, central neurocytoma, ganglioglioma, choroid plexus papilloma, primitive neuroectodermal tumors, meningioma, epidermoid tumor). Such lesions represent a subgroup of intracranial lesions with unique characteristics and some image patterns that may facilitate the differential diagnosis.

Keywords: Neoplasms; Cerebral ventricle neoplasms; Central nervous system; Magnetic resonance imaging.

Schwannomas are benign nerve sheath tumors composed of Schwann cells, which normally produce the insulating myelin sheath covering peripheral, cranial and autonomic nerves. Twenty-five to forty-five percent of all schwannomas occur in the head and neck region, but location of such tumors in the larynx is rarely observed. The present report is aimed at describing a clinical case of laryngeal schwannoma, with emphasis on sonographic findings.

Keywords: Laryngeal neoplasms; Ultrasonography; Computed tomography.

The present essay is illustrated with magnetic resonance images obtained at the authors' institution over the past 15 years and discusses the main imaging findings of intraventricular tumor-like lesions (colloid cyst, oligodendroglioma, astroblastoma, lipoma, cavernoma) and of inflammatory/infectious lesions (neurocysticercosis and an atypical presentation of neurohistoplasmosis). Such lesions represent a subgroup of intracranial lesions with unique characteristics and some imaging patterns that may facilitate the differential diagnosis.

Keywords: Neoplasms; Cerebral ventricle neoplasms; Central nervous system; Magnetic resonance imaging.

OBJECTIVE: The present study was aimed at evaluating the contribution of transrectal prostate ultrasound in the screening for prostate neoplasias and in the guidance of prostate biopsies. MATERIALS AND METHODS: Prospective study developed over a one-year period. All the patients with indication for prostate biopsy were evaluated. Regardless of PSA values, the patients underwent ultrasound in order to identify suspicious nodules (confirmed by two observers). Sextant biopsy was subsequently performed. In cases of finding suspicious nodules, an additional puncture directed to such nodules was done. RESULTS: In a total of 155 cases the prevalence of malignancy was of 53%. Suspicious nodules were detected in 34 patients, and 25 where malignant (positive predictive value of 74%). The specificity and sensitivity for suspicious nodules were 88% and 31% respectively. Comparatively with the randomly obtained sextant specimens, the rate of findings of neoplasia was higher in the specimens obtained with puncture directed to the nodule (p = 0.032). No statistically significant difference was observed in the Gleason score for both types of specimens (p = 0.172). CONCLUSION: The high positive predictive value and the high rate of findings of neoplasia in specimens of suspicious nodules should be taken into consideration in the future. The authors suggest a biopsy technique similar to the one described in the present study (sextant biopsy plus puncture directed to the suspicious nodule).

Keywords: Prostatic neoplasia; Ultrasonography; Imaging-guided biopsy; Diagnostic techniques and procedures; Screening.

OBJECTIVE: To determine the rates of diagnostic underestimation at stereotactic percutaneous core needle biopsies (CNB) and vacuum-assisted biopsies (VABB) of nonpalpable breast lesions, with histopathological results of atypical ductal hyperplasia (ADH) or ductal carcinoma in situ (DCIS) subsequently submitted to surgical excision. As a secondary objective, the frequency of ADH and DCIS was determined for the cases submitted to biopsy. MATERIALS AND METHODS: Retrospective review of 40 cases with diagnosis of ADH or DCIS on the basis of biopsies performed between February 2011 and July 2013, subsequently submitted to surgery, whose histopathological reports were available in the internal information system. Biopsy results were compared with those observed at surgery and the underestimation rate was calculated by means of specific mathematical equations. RESULTS: The underestimation rate at CNB was 50% for ADH and 28.57% for DCIS, and at VABB it was 25% for ADH and 14.28% for DCIS. ADH represented 10.25% of all cases undergoing biopsy, whereas DCIS accounted for 23.91%. CONCLUSION: The diagnostic underestimation rate at CNB is two times the rate at VABB. Certainty that the target has been achieved is not the sole determining factor for a reliable diagnosis. Removal of more than 50% of the target lesion should further reduce the risk of underestimation.

Keywords: Breast neoplasia; Core needle biopsy; Vacuum-assisted biopsy; Diagnostic techniques and procedures; Noninvasive intraductal carcinoma.

Only 5–10% of osteosarcomas arise from the craniofacial bones. We report the case of a 14-year-old female patient who presented with headache and a mass that had been growing in the left frontoparietal region for six months. We describe the findings on conventional radiography, computed tomography, and magnetic resonance imaging.

Keywords: Osteosarcoma; Neoplasms; Skull.

OBJECTIVE: To evaluate the added value of diffusion-weighted imaging (DWI) in the preoperative assessment of myometrial invasion in endometrial cancer, in comparison with T2-weighted imaging (T2WI) and dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI). MATERIALS AND METHODS: This was a retrospective study involving 44 women with endometrial cancer who underwent preoperative 1.5 T MRI. Two radiologists, both of whom were blinded to the histopathology reports, performed a consensus interpretation of the depth of myometrial invasion and of the stage of the cancer, considering three sets of sequences: T2WI, DCE-MRI+T2WI, and DWI+T2WI. Accuracy, sensitivity, specificity, positive predictive value, and negative predictive value were calculated for each set. The accuracy was compared with p-value adjustment by the Benjamini-Hochberg procedure. RESULTS: Among the 44 patients evaluated, DWI+T2WI demonstrated better diagnostic performance in assessing deep myometrial invasion and correctly staged more patients (n = 41) than did DCE-MRI+T2WI (n = 34) and T2WI (n = 22). The superior diagnostic accuracy of DWI+T2WI was statistically significant in comparison with T2WI (p < 0.05) but not in comparison with DCE-MRI+T2WI (p > 0.05). CONCLUSION: The addition of DWI apparently improves the diagnostic accuracy of MRI in the preoperative assessment of the depth of myometrial invasion in endometrial cancer, which may be particularly helpful in patients for whom contrast agents are contraindicated.

Keywords: Endometrial neoplasms; Magnetic resonance imaging; Gynecology; Neoplasms; Endometrium/pathology.

Os nervos cranianos representam extensões das estruturas funcionais do cérebro que cruzam a cabeça e o pescoço. Eles estão ligados a diferentes estruturas cranianas e se relacionam com diversas doenças. Uma compreensão profunda de sua complexa anatomia e aparência normal de imagem permite ao examinador identificar e caracterizar com mais precisão as anormalidades. A ressonância magnética com contraste é uma importante ferramenta para avaliar essas estruturas, especialmente as sequências tridimensionais de precessão livre de estado estacionário, que proporcionam alta resolução espacial e de partes moles, apesar da fina espessura dos nervos cranianos. Na maioria dos casos, os achados de imagem são inespecíficos, e uma anamnese completa, exame físico dirigido e testes laboratoriais são necessários para estreitar o diagnóstico diferencial. Este ensaio iconográfico ilustra e discute doenças congênitas, traumáticas e vasculares dos nervos cranianos, mostrando imagens em uma abordagem fisiopatológica.

Keywords: Neuroimagem/métodos; Radiologia/métodos; Ressonância magnética/métodos; Nervos cranianos/diagnóstico por imagem.