WILLIAM CARLOS NAHAS
Projetos de Pesquisa
Unidades Organizacionais
Departamento de Cirurgia, Faculdade de Medicina - Docente
Instituto Central, Hospital das Clínicas, Faculdade de Medicina
LIM/55 - Laboratório de Urologia, Hospital das Clínicas, Faculdade de Medicina - Líder
Instituto Central, Hospital das Clínicas, Faculdade de Medicina
LIM/55 - Laboratório de Urologia, Hospital das Clínicas, Faculdade de Medicina - Líder
18 resultados
Resultados de Busca
Agora exibindo 1 - 10 de 18
- Modified biplanar (0-90°) endoscopic-guided puncture technique for percutaneous nephrolithtomy: refinement with endoscopic combined intrarrenal surgery to reduce fluoroscopy and operative time(2023) MARCHINI, Giovanni Scala; LIMA, Fabio Sepulveda; CAMPOS, Marcelo Esteves Chaves; MAROCCOLO, Marcus Vinicius Osorio; REGGIO, Ernesto; MAZZUCCHI, Eduardo; NAHAS, William Carlos; SANTOS, Luiz Sergio; HOTA, Thiago
article 3 Citação(ões) na Scopus Renal pseudoaneurysm after core-needle biopsy of renal allograft successfully managed with superselective embolization(2016) ANTONOPOULOS, Ioannis M.; YAMACAKE, Kleiton Gabriel Ribeiro; TISEO, Bruno C.; CARNEVALE, Francisco C.; JUNIOR, Enio Z.; NAHAS, William C.- Eosinophilic Solid and Cystic Renal Cell Carcinoma: Imaging Features of a Novel Neoplasm(2018) FENELON, Sandro Santos; SANTOS, Joao Manoel Miranda Magalhaes; FARAJ, Sheila Friedrich; MATTEDI, Romulo Loss; TRPKOV, Kiril; NAHAS, William Carlos; GARCIA, Marcio Ricardo Taveira; VIANA, Publio Cesar CavalcanteEosinophilic solid and cystic renal cell carcinoma (ESC RCC) is a recently described entity with distinct clinical, pathologic, and molecular features. However, the radiological aspects of ESC RCC have not been characterized. In this report, we describe the imaging findings of 2 ESC RCCs. We found 2 distinct imaging patterns that varied depending on histopathologic features (solid or cystic predominance). In conclusion, it is important to know the imaging characteristics and pathologic correlation of this novel neoplasm to increase its recognition and to improve the decision-making process. (C) 2018 Elsevier Inc.
- Case 297: Mucinous Adenocarcinoma of the Prostate(2022) KANAS, Alexandre Fligelman; FENELON, Sandro Santos; SANTOS, Joao Manoel Miranda Magalhaes; COELHO, Rafael Ferreira; GUGLIELMETTI, Giuliano Betoni; NAHAS, William Carlos; VIANA, Publio Cesar Cavalcante
- Laparoscopic Ureterocalicostomy Technique(2023) NUNES, Romulo S. S.; SUARTZ, Caio V.; ANDRADE, Hiury S.; JORDAO, Ricardo D.; SROUGI, Victor; MITRE, Anuar I.; NAHAS, William C.; ARAP, Marco A.Purpose: Ureterocalicostomy is a technique that was first described by Neuwirt in 1948 (1) The laparoscopic access was initiated in 2003 by Cherullo et al. (2), following the established principles of open surgery. In 2004, Gill et al. had two patients with UPJO treated with laparoscopic ureterocalicostomy, with success (3). In 2014, Arap et. al. presented a case series with good results in adults and children in our service (4). There are factors that prepare the surgeon for an ureterocalicostomy, such as the renal cortex thickness, although the decision is mainly taken during the procedure (5).Material and Methods: A 24 years-old female patient with right lumbar pain was referred to our institution. She already had a right open pyeloplasty two years ago. The CT scan presented a right hydronephrotic kidney, DMSA scan with 30% of relative function and a DTPA scan with an obstructive pattern.Results: A laparoscopic ureterocalicostomy was performed due to the intra-operative findings (inferior kidney pole thickness and challenging access to the uretero-pelvic junction). The overall time was 130 minutes with no complications. The patient was discharged in two days and the double J was withdrawn in four weeks. The CT scan within one year demonstrates a reduction of the hydronephrosis. She had no more lumbar pain.Conclusion: In complex cases, the laparoscopic ureterocalicostomy proves to be a safe and efficient procedure, with a free tension-free anastomosis and the advantages of the laparoscopic access.
- Robot-assisted simple prostatectomy: the evolution of a surgical technique(2021) RODRIGUES, Gilberto J.; SAWCZYN, Guilherme V.; GUGLIELMETTI, Giuliano B.; FAZOLI, Arnaldo J. C.; TANURE, Luis H. R.; NAHAS, William C.; COELHO, Rafael F.
- Caliceal-cutaneous Fistula After Kidney Transplantation(2012) TORRICELLI, Fabio Cesar Miranda; PIOVESAN, Affonso Celso; ANTONOPOULOS, Ioannis Michel; FALCI JR., Renato; SAITO, Fernando Jose Akira; KANASHIRO, Hideki; EBAID, Gustavo Xavier; NAHAS, William CarlosUrinary fistula is a one of the most common complications after kidney transplantation. Conservative treatment with stent and Foley catheter drainage may be tried, however in some cases more invasive approach is needed. Caliceal fistula is a rare condition and the diagnosis may be missed. Here we present an interesting case of caliceal-cutaneous fistula diagnosed by computed tomography after living kidney transplantation. After failure of conservative management, the patient was successfully treated with partial nephrectomy. UROLOGY 79: e71, 2012. (C) 2012 Elsevier Inc.
- Complete supine percutaneous nephrolithotomy with GoPro (R). Ten steps for success(2018) VICENTINI, Fabio Carvalho; SANTOS, Hugo Daniel Barone dos; BATAGELLO, Carlos Alfredo; AMUNDSON, Julia Rothe; OLIVEIRA NETO, Evaristo Peixoto; MARCHINI, Giovanni Scala; SROUGI, Miguel; NAHAS, Willian Carlos; MAZZUCCHI, EduardoObjective: To show a video of a complete supine Percutaneous Nephrolithotomy (csPCNL) performed for the treatment of a staghorn calculus, from the surgeon's point of view. The procedure was recorded with a GoPro (R) camera, demonstrating the ten essential steps for a successful procedure. Materials and methods: The patient was a 38 years-old woman with 2.4cm of left kidney lower pole stone burden who presented with 3 months of lumbar pain and recurrent urinary tract infections. She had a previous diagnosis of polycystic kidney disease and chronic renal failure stage 2. CT scan showed two 1.2cm stones in the lower pole (Guy's Stone Score 2). She had a previous ipsilateral double J insertion due to an obstructive pyelonephritis. The csPCNL was uneventful with a single access in the lower pole. The surgeon had a Full HD GoPro Hero 4 Session (R) camera mounted on his head, controlled by the surgical team with a remote control. All of the mains steps were recorded. Informed consent was obtained prior to the procedure. Results: The surgical time was 90 minutes. Hemoglobin drop was 0.5g/dL. A post-operative CT scan was stone-free. The patient was discharged 36 hours after surgery. The camera worked properly and didn't cause pain or muscle discomfort to the surgeon. The quality of the recorded movie was excellent. Conclusion: GoPro (R) camera proved to be a very interesting tool to document surgeries without interfering with the procedure and with great educational potential. More studies should be conducted to evaluate the role of this equipment.
- Thulium fiber laser in cystine calculi(2023) GISMONDI, Joao Pedro Machado; BENTO, Afonso da Silva Alves; MAZZUCCHI, Eduardo; NAHAS, William CarlosIntroduction: Thulium Fiber Laser (TFL) is the most modern technology to treat nephrolithiasis and ureterolithiasis in endourology. Although there are a lot of new studies coming up, we still don't have data on how this laser works in some rare diseases. Cystinuria is the most common genetic nephrolithiasis disorder (1), known for its recurrent lithiasis (2). Our main goal in this video is to show a successful case of cystine calculi treated with Thulium Fiber Laser (Laser Fiber Dust/Quanta System (TM)). Cystinuria is the most common genetic nephrolithiasis disorder (1), known for its recurrent lithiasis (2).Materials and Methods: A 25 years-old male, cystinuric, presented with a CT scan, showing a 10mm stone on the right side and two calculi 6 and 7 mm on the left side, all located in the lower calyx. Bilateral flexible ureteroscopy was done using a reusable digital flexible ureteroscope.Starting on the left side, we repositioned the stone from the lower to the upper calyx, using a tipless front opening basket. Lithotripsy was performed using TFL. Settings were 100 Hz (frequency) and 100 mJ (energy) for dusting. Popcorn tech-nique was also used, setting the laser at 100Hz and 200 mJ, obtaining good dusting. On the right side, lithotripsy was performed in the inferior calyx, also resulting in ""snowstorm"". Procedure time was 120 minutes.Results: The postoperative was uneventful. Follow up CT showed a 3 mm residual fragment in the right kidney.Conclusion: This video demonstrates the treatment of bilateral cystine calculi with Thulium Fiber Laser. Reasonable procedure time and excellent dusting results are encouraging, pointing towards great improvements in endourology.
- En Bloc Resection of Bladder Tumors (ERBT) using different lasers - Hybrid and Holmium Laser(2023) ISCAIFE, Alexandre; SOCARRAS, Moises Rodriguez; GONZALEZ, Luis Llanes; RIVAS, Juan Gomez; PEREIRA, Maykon William Aparecido Pires; LEITE, Katia Ramos Moreira; NAHAS, Willian Carlos; SANCHA, Fernando Gomez