Browsing by Author "Alves, AS"
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- Adenocarcinoma of the Urachus: A Primary Not to OverlookPublication . Alves, AS; Camelo, R; Varela, M; Lopes Dias, JUrachal carcinoma is a rare and aggressive neoplasm, involving the urachus, a remnant of the fetal genitourinary tract that extends from the umbilicus to the dome of the bladder. We present a 49-year-old woman with a history of pelvic discomfort and a palpable suprapubic mass. Pelvic ultrasound and magnetic resonance revealed a 55-mm midline supravesical mass, arising from the urachus and extending inferiorly through the bladder. The characteristics of the mass and its location favored the diagnosis of urachal carcinoma. There were no regional or distant metastases. The patient underwent surgical resection of the tumor and histopathological examination confirmed the diagnosis of a non-cystic enteric type urachal adenocarcinoma. The purpose of this article is to present a case of primary adenocarcinoma of the urachus, describe its epidemiology and clinical features, as well as illustrate its key imaging findings along with pathologic correlation
- Clues to the Diagnosis of Borderline Ovarian Tumours: an Imaging GuidePublication . Alves, AS; Félix, A; Cunha, TBorderline Ovarian Tumours (BOTs) are an interesting subset of epithelial neoplasms defined histologically by atypical epithelial proliferation without stromal invasion. These tumours typically affect young women in the reproductive age group and have a good prognosis. Although ultrasonography is the primary screening imaging technique in the evaluation of any suspected adnexal mass, grey-scale and colour Doppler have limited value in characterizing BOTs. Thus, a pelvic magnetic resonance imaging (MRI) is recommended for further characterization on account of its multiplanar capabilities, excellent soft-tissue contrast and high spatial resolution. BOTs histological subtypes display specific features on MRI that are useful in differential diagnosis. However, the final diagnosis and staging of BOTs require pathologic evaluation after surgical excision. Therefore, the purpose of this review is to describe, illustrate and compare the imaging characteristics of the different subtypes of BOTs - serous, mucinous and seromucinous - focusing on MRI, as well as to correlate with pathology findings considering the recent 2020 World Health Organization (WHO) classification, in order to improve the accuracy of preoperative diagnosis and facilitate optimal patient management.