Publications by authors named "Maria Aparecida Conte Maia"

Introduction: Primary vaginal cancer is infrequent, corresponding to 1-2% of all female genital tract cancer diagnoses.Treatment for vaginal cancer varies depending on tumor histology, size, location and staging, and may include one or more of the following: surgical excision, radiation therapy and/or chemotherapy. All treatments negatively affect fertility/pregnancy outcomes.

View Article and Find Full Text PDF

Purpose: To assess the impact and optimize the prescription of tissue-equivalent bolus in postmastectomy radiotherapy (PMRT), we compared the use of different bolus regimens tailored by skin involvement status.

Methods: Patients with breast cancer who required PMRT were recruited (NCT01925651) and classified into two groups: standard-risk (SR, without skin involvement) and high-risk (HR, with skin involvement). SR was randomized between no bolus or 5 mm-bolus on alternate days and HR between 5 mm-bolus on alternate days or daily.

View Article and Find Full Text PDF

Background: To evaluate the local control of brain metastases (BM) in patients treated with stereotactic radiosurgery (SRS), correlate the outcome with treatment parameters and lesion characteristics, and define its implications for clinical decisions.

Methods: Between 2007 and 2012, 305 BM in 141 consecutive patients were treated with SRS. After exclusions, 216 BM in 100 patients were analyzed.

View Article and Find Full Text PDF

Purpose: To evaluate the feasibility of reirradiation of the eye with plaque brachytherapy (REPBT) for local recurrence (LR) of malignant disease of the eye as an alternative to enucleation or other local salvage treatments.

Methods And Materials: It was performed a retrospective analysis of all patients who underwent REPBT for LR. The main parameters evaluated were local control and progression-free survival, besides the toxicity profile.

View Article and Find Full Text PDF

Aims: The nuclear factor κ B (NF-κB) family comprises transcription factors that promote the development and progression of cancer. The NF-κB pathway is induced by radiation therapy and may be related to tumour radioresistance. The aim of this study was to evaluate the expression of NF-κB as a predictor of the response to radiotherapy and its value as a prognostic marker.

View Article and Find Full Text PDF

Purpose: To evaluate outcomes in patients with posterior choroidal melanoma treated with ruthenium ((106)Ru) brachytherapy.

Methods And Materials: A retrospective single institutional analysis of 83 of 94 consecutive patients who underwent (106)Ru brachytherapy was performed. Disease was mainly staged as small- and medium-sized nonmetastatic melanoma.

View Article and Find Full Text PDF

Background: The literature is scarce regarding the use of interstitial high-dose-rate brachytherapy (I-HDR) as adjuvant treatment of the cervical region, and most reports are focused on primary tumors of the mobile tongue and oropharynx. We evaluated the outcome and morbidity related to an institutional treatment policy, using I-HDR as the sole adjuvant treatment or in combination with external beam radiotherapy (EBRT) at the Departments of Radiation Oncology and Head and Neck Surgery, Hospital do Cancer, Sao Paulo, Brazil.

Methods: From October 1994 to December 2003, charts of 42 patients who had biopsy-proven cervical head and neck cancer, with a median follow-up of 36 months (range, 8-111 months), were reviewed.

View Article and Find Full Text PDF

Purpose: This retrospective analysis aims to report on the comparative outcome of cervical cancer patients treated with low dose rate (LDR) and high dose rate (HDR) brachytherapy.

Methods And Materials: From 1989 to 1995, 190 patients were treated with low dose rate (LDR) brachytherapy (LDR group) and from 1994 to 2001, 118 patients were treated with high dose rate (HDR) brachytherapy (HDR group). FIGO stage distribution for the LDR group was Stage I: 6.

View Article and Find Full Text PDF

This study evaluated cytogenetic damage by measuring the frequency of micronucleated cells (MNC) in peripheral blood and buccal mucosa of head-and-neck cancer patients undergoing radiotherapy. MNC frequencies were assessed in 31 patients before, during, and after radiotherapy, and in 17 healthy controls matched for gender, age, and smoking habits. Results showed no statistically significant difference between patients and controls prior to radiotherapy in cytokinesis-blocked lymphocytes or buccal mucosa cells.

View Article and Find Full Text PDF

Background: Nasopharyngeal carcinoma in childhood is rare. Radiochemotherapy is considered the standard treatment and yields increased survival and local control rates. In this article, the authors report on the results from the multidisciplinary treatment of pediatric patients who had nasopharyngeal lymphoepithelioma with radiochemotherapy, including high-dose-rate brachytherapy of the primary tumor site.

View Article and Find Full Text PDF

Purpose: This retrospective analysis reports the results on patients with anal canal carcinoma treated by combined radiotherapy and chemotherapy.

Methods And Materials: Between March 1993 and December 2001, 43 patients with anal canal carcinoma were treated with radiochemotherapy at the Hospital do Cancer A.C.

View Article and Find Full Text PDF

Purpose: Late urinary retention (UR) is a known complication that may occur when using high dose rate brachytherapy (HDR-B) to boost external beam radiation therapy (EBRT) when treating prostate cancer. However, the dosimetric, treatment and clinical factors associated with this complication are not well-known.

Materials And Methods: From March 1997 to March 2000 a total of 108 patients with local or locally advanced prostate adenocarcinoma were treated with EBRT (45 Gy) and HDR-B as a boost, when 16 to 20 Gy was given in 4 fractions twice daily.

View Article and Find Full Text PDF

Purpose: To evaluate the impact on biochemical control (bNED), acute and late gastro-intestinal (GI) and urological (GU) morbidity of initial and locally advanced prostate cancer treated with fractionated transrectal ultrasound-guided (TRUS) high dose rate after loading brachytherapy (HDR-B) as a boost to conventional external beam radiation therapy (EBRT).

Patients And Methods: From March 1997 to February 2000 a total of 119 patients with any of the following characteristics were eligible for study entry: biopsy proven adenocarcinoma Gleason scored (GS), initial prostatic specific antigen (PSA) level dosage 1992 AJCC clinical stage T3a or less, and prostatic volume <60 cc. All patients had prior to HDR-B a course of EBRT 6 MV photons to a median dose of 45 Gy, in 1.

View Article and Find Full Text PDF