Publications by authors named "Antonio C de A Pellizzon"

Background: The rates of laryngeal preservation according to therapeutic modality in patients with initial laryngeal squamous cell carcinoma (LSCC) are still controversial. This study evaluated the rates of laryngeal preservation in patients who underwent treatment with surgery or radiotherapy.

Methods: This retrospective cohort study evaluated 151 patients with stage I or II LSCC.

View Article and Find Full Text PDF

Purpose: The COVID-19 pandemic brought several challenges to cancer practice, especially in ensuring continuity of treatment during this period while minimizing the risks of transmission to a vulnerable population. For radiation oncology departments in Brazil, this contingency has become even more complex owing to the significant effect observed in different sectors of society and the large number of COVID-19 cases and deaths. This study estimated the effect of the COVID-19 pandemic on Brazilian radiation oncology departments and the coping measures used in the country.

View Article and Find Full Text PDF

Breast cancer is the most commonly diagnosed cancer in Brazilian women and the leading causing of cancer death among them. Breast-conserving surgery (BCS) followed by whole breast radiotherapy has become the standard care for early breast cancer. Although the omission of adjuvant breast radiotherapy has been associated with worse oncological outcomes, distance from treatment centers directly affects the employment of adjuvant breast irradiation.

View Article and Find Full Text PDF

Purpose: Postinsertion computed tomography (CT) can identify air gaps (AGs) around the cylinder in vaginal cuff brachytherapy (VCB). This study investigates the incidence and location of AGs.

Methods And Materials: Planning CTs of 22 prospectively recruited patients (NCT02091050) treated with 2.

View Article and Find Full Text PDF

Objectives: To perform a systematic review of 1762 patients to comprehensively assess the benefit of altered-fractionation radiotherapy (ART) in early stage glottic carcinoma (ESGC).

Materials And Methods: Studies were identified in PubMed and EMBASE. Inclusion criteria were: (1) diagnosis of squamous cell ESGC (Tis, T1, T2); (2) ART versus conventionally-fractionationated radiotherapy (CRT); and (3) provision of number of local recurrence events and total numbers per fractionation arm.

View Article and Find Full Text PDF

Purpose: To compare and evaluate the utility of varying hemostatic radiotherapy prescriptions for emergent palliation of bleeding tumors.

Materials And Methods: This retrospective study analyzed 112 consecutive patients treated with radiotherapy for emergent palliation of bleeding tumors at an academic institution. Study endpoints included: primary bleeding control; re-bleeding rate after initial control; treatment interruption rate; overall survival; and death within 30 days of treatment.

View Article and Find Full Text PDF

Purpose: High-dose-rate brachytherapy (HDR-BT) alone is an adjuvant treatment option for stage I intermediaterisk endometrial cancer after complete surgical resection. The aim of this study was to determine the value of the dose reported to ICRU bladder point in predicting acute urinary toxicity. Oncologic results are also presented.

View Article and Find Full Text PDF

Objective: To investigate occurrences of hearing loss and hearing complaints among patients with head and neck tumors who underwent radiotherapy.

Design: Prospective case-control study.

Setting: Tertiary care hospital.

View Article and Find Full Text PDF