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1.
Heliyon ; 10(8): e29640, 2024 Apr 30.
Artículo en Inglés | MEDLINE | ID: mdl-38644885

RESUMEN

Background: Pelvic exenteration (PE) is a major surgical procedure used as a salvage therapy for patients with locally advanced or recurrent pelvic malignancies. Urinary reconstruction is a major part of PE and is often associated with high rates of post-operative complications. In the current study we evaluate the short and long-term urological outcomes following PE for Colo-Rectal (CR) and gyneco-oncological (GO) malignancies. Methods: Study included 22 patients who underwent PE for recurrent or locally advanced CR and GO malignancies in our institution between the years 2010-2018. The endpoint was post-operative freedom from urological complications. Results: Of 22 patients included, 13 (59 %) and 9 (41 %) underwent PE for CR and GO malignancies respectively. The mean age of the patients was 54 years. The median follow-up was 19 months. Seven (78 %) patients with GO malignancy and 11 (85 %) with CR malignancy underwent PE for local recurrence. Hydronephrosis prior to surgery existed in 8 (36.3 %) patients, of which, 5 patients required kidney drainage via nephrostomy tube. Two patients underwent posterior pelvic exenteration (PPE) with bladder preservation whereas the remaining 20 underwent cystectomy with urinary diversion by ileal conduit. Hydronephrosis post PE developed in 13 patients (59 %). eight (36 %) patients needed kidney drainage by nephrostomy tubes post PE, of these, 6 (75 %) had disease recurrence. The 2 years freedom from kidney drainage was 68 %, however the median time for kidney drainage was 0.5 months. The median overall survival was 12.5 months. Conclusion: The rate of urological complications following PE is relatively high and associated with disease recurrence.

2.
Ann Surg Oncol ; 29(5): 2773-2783, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-35211857

RESUMEN

BACKGROUND: The purpose of this article is to summarize the opinions of the surgical oncology leaders from the Global Forum of Cancer Surgeons (GFCS) about the global impact of COVID-19 pandemic on cancer surgery. METHODS: A panel session (virtual) was held at the annual Society of Surgical Oncology 2021 International Conference on Surgical Cancer Care to address the impact of COVID-19 on cancer surgery globally. Following the virtual meeting, a questionnaire was sent to all the leaders to gather additional opinions. The input obtained from all the leaders was collated and analyzed to understand how cancer surgeons from across the world adapted in real-time to the impact of COVID-19 pandemic. RESULTS: The surgical oncology leaders noted that the COVID-19 pandemic led to severe disruptions in surgical cancer care across all domains of clinical care, education, and research. Several new changes/protocols associated with increased costs were implemented to deliver safe care. Leaders also noted that preexisting disparities in care were exacerbated, and the pandemic had a detrimental effect on well-being and financial status. CONCLUSIONS: The COVID-19 pandemic has led to severe disruptions in surgical cancer care globally. Leaders of the GFCS opined that new strategies need to be implemented to prepare for any future catastrophic events based on the lessons learned from the current events. The GFCS will embark on developing such a roadmap to ensure that surgical cancer care is preserved in the future regardless of any catastrophic global events.


Asunto(s)
COVID-19 , Neoplasias , Cirujanos , Oncología Quirúrgica , COVID-19/epidemiología , Humanos , Neoplasias/cirugía , Pandemias
3.
Eur J Surg Oncol ; 47(11): 2933-2938, 2021 11.
Artículo en Inglés | MEDLINE | ID: mdl-34088586

RESUMEN

BACKGROUND: Peritoneal Cancer Index (PCI) and complete cytoreduction are the best outcome predictors following cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC). Lesions in critical areas, regardless of PCI, complicate surgery and impact oncological outcomes. We prospectively defined "Critical lesions" (CL) as penetrating the hepatic hilum, diaphragm at hepatic outflow, major blood vessels, pancreas, or urinary tract. METHODS: Retrospective analysis of a prospective database of 352 CRS + HIPEC patients from 2015 to 2019. Excluded patients with aborted/redo operation (n = 112), or incomplete data (n = 19). Patients categorized by CL status and compared: operative time, estimated blood loss (EBL), PCI, transfusions, hospital stay, post-operative complications and mortality, overall survival (OS) and disease-free survival (DFS). RESULTS: Included 221 patients (78 CL; 143 no-CL). No difference in patients' characteristics: age, BMI, gender or co-morbidities noted. Operative time longer (5.3 h vs 4.3 h, p < 0.01), EBL higher (769 ml vs 405 ml, p < 0.01), transfusions higher (1.9 vs 0.7 Units, p < 0.001) and PCI higher (15.5 vs 9.5, p < 0.01) in CL. No difference in major complications. Postoperative complications, CL, OR-time and transfusions were predictive of OS in univariate analysis, while only complications remained on multivariate analysis. Median follow up of 21.4 months, 3-year DFS/OS was 22% vs 30% (p < 0.037) and 73% vs 87% (p < 0.014) in CL and non-CL, respectively. Despite CL complete resection, 17/38 patients (44.7%) that recurred had recurrence at previous CL site. CONCLUSIONS: Critical lesions complicate surgery and may be associated with poor oncological outcomes with high local recurrence rate, despite no significant difference in complications. Utilizing adjuvant or intra-operative radiation may be beneficial.


Asunto(s)
Procedimientos Quirúrgicos de Citorreducción , Quimioterapia Intraperitoneal Hipertérmica , Invasividad Neoplásica/patología , Neoplasias Peritoneales/patología , Neoplasias Peritoneales/terapia , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Pérdida de Sangre Quirúrgica , Transfusión Sanguínea/estadística & datos numéricos , Terapia Combinada , Femenino , Humanos , Masculino , Persona de Mediana Edad , Tempo Operativo , Complicaciones Posoperatorias , Estudios Retrospectivos
5.
Ann Surg Oncol ; 26(4): 1103-1109, 2019 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-30746598

RESUMEN

BACKGROUND: This study aimed to examine the correlation between intraoperative and pathological findings for patients undergoing cytoreductive surgery with hyperthermic intraperitoneal chemotherapy (CRS/HIPEC) and to determine their prognostic significance. METHODS: Pathological reports of all colorectal cancer (CRC) patients undergoing CRS/HIPEC between 2009 and 2016 were retrospectively reviewed. Pathological specimens lacking tumor cells were defined as negative pathological specimens (NPS). The intraoperative peritoneal cancer index (PCI) and pathological PCI (excluding NPS) were calculated separately. Receiver operating characteristic (ROC) curves were applied to compare the prognostic value of intraoperative and pathological scoring systems. RESULTS: For 108 CRC patients, 113 CRS/HIPEC procedures were performed. Of 959 pathological specimens examined, 178 (18.6%) were NPS. Overall, 78 procedures (69%) showed NPS. In 52 procedures (46%), the pathological PCI differed from the intraoperative PCI (∆PCI > 0). The ROC areas for intraoperative PCI and pathological PCI were similar in predicting 1-year overall survival (OS), 2-year OS, and 1-year disease-free survival (all p values not significant). However, for the patients with NPS, the number of positive specimens (containing tumor tissue) was superior to intraoperative PCI in predicting 2-year OS (ROC under the curve areas, 0.69 vs. 0.58, respectively; p = 0.012). In addition, a subgroup of 15 patients with a high ∆PCI (≥ 3) had a more favorable median OS than a matched group of 30 patients with similar intraoperative PCI and a ∆PCI of 0 (median survival not reached vs. 21.6 months, respectively; p = 0.05). CONCLUSIONS: In the majority of CRC CRS/HIPEC procedures, NPS may be found. Among patients with NPS, pathological correlation may have a prognostic significance.


Asunto(s)
Quimioterapia del Cáncer por Perfusión Regional/métodos , Neoplasias Colorrectales/patología , Procedimientos Quirúrgicos de Citorreducción/métodos , Hipertermia Inducida/métodos , Neoplasias Peritoneales/secundario , Neoplasias Colorrectales/terapia , Terapia Combinada , Femenino , Estudios de Seguimiento , Humanos , Cuidados Intraoperatorios , Masculino , Persona de Mediana Edad , Neoplasias Peritoneales/terapia , Pronóstico , Estudios Prospectivos , Estudios Retrospectivos , Tasa de Supervivencia
6.
Ann Surg Oncol ; 25(3): 660-666, 2018 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-29285641

RESUMEN

BACKGROUND: Hyperthermic intraperitoneal chemotherapy (HIPEC) following cytoreductive surgery (CRS), performed using closed-abdomen technique (CAT), may affect intraabdominal pressure (IAP). High IAP may increase postoperative complications due to decreased venous return and hypoperfusion to vital organs. Elevated core body temperature (CBT) may cause multiorgan dysfunction. Low IAP or CBT could result in suboptimal HIPEC and potentially translate into early disease recurrence. The aim of the present study is to identify possible correlations between IAP or CBT and postoperative complications. PATIENTS AND METHODS: Continuous intraabdominal pressure measurement was performed by intraabdominal catheter. Inflow temperature was set at 44 °C, and mean perfusate temperature was 42 °C. CBT was measured continuously in the distal esophagus. We compared the rate of postoperative complications between the low IAP group (2-10 mmHg, n = 28), target IAP group (10-20 mmHg, n = 71), and high IAP group (20-34 mmHg, n = 16) as well as with CBT as a continuous variable. RESULTS: 115 patients were included in the study. There was no difference between IAP groups in terms of age, gender, primary diagnosis, operative peritoneal cancer index, CBT, or operative time. There was no correlation between IAP and postoperative complications or with prolonged hospital stay. On multivariate analysis, elevated mean CBT was a positive predictor of postoperative complications (p = 0.035). CONCLUSIONS: IAP level during closed-abdomen technique HIPEC is not associated with postoperative complications. However, elevated CBT may increase postoperative complications.


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Temperatura Corporal , Procedimientos Quirúrgicos de Citorreducción/efectos adversos , Hipertermia Inducida/efectos adversos , Hipertensión Intraabdominal/etiología , Neoplasias Peritoneales/terapia , Complicaciones Posoperatorias/diagnóstico , Quimioterapia Adyuvante , Quimioterapia del Cáncer por Perfusión Regional , Terapia Combinada , Femenino , Estudios de Seguimiento , Humanos , Tiempo de Internación , Masculino , Persona de Mediana Edad , Neoplasias Peritoneales/patología , Pronóstico , Estudios Prospectivos , Estudios Retrospectivos
7.
World J Surg ; 41(1): 75-81, 2017 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-27730353

RESUMEN

BACKGROUND: Acute appendicitis is the most common nonobstetric indication for surgical intervention during pregnancy. However, the current literature is scarce and composed of relatively small case series. We aimed to compare the presentation, management, and surgical outcomes of presumed acute appendicitis between a contemporary cohort of pregnant women and nonpregnant women of reproductive age. METHODS: The study group included 92 pregnant patients who underwent appendectomy for presumed acute appendicitis at a single tertiary medical center in 2000-2014. Preoperative, operative, and postoperative clinical data were derived from medical records and compared to data for 494 nonpregnant patients of reproductive age who underwent appendectomy in 2004-2007 at the same institution. RESULTS: Median age was 28 years (range 25-33) in the study group and 26 years (range 20-34) in the control group (P = 0.1). There were no between-group differences in mean white blood cell count, patient interval, hospital interval, or operative time. Preoperative abdominal ultrasound was used in a significantly higher proportion of patients in the pregnant group than in the nonpregnant group (73 and 27 %, respectively, P < 0.001) and computed tomography, in a significantly lower proportion of patients (1 vs. 16 %, respectively, P < 0.001) . The two groups had similar rates of negative appendectomy (23 and 22 %, P = 0.9), complicated appendicitis (12 and 11 %, P = 0.9), and overall postoperative complications (15 and 12 %, P = 0.3). CONCLUSIONS: The clinical presentation and outcome of presumed acute appendicitis are similar in pregnant women and nonpregnant women of reproductive age. Therefore, similar perioperative management algorithms may be applied in both patient populations.


Asunto(s)
Apendicectomía , Apendicitis/cirugía , Complicaciones del Embarazo/cirugía , Enfermedad Aguda , Adulto , Apendicectomía/métodos , Apendicitis/diagnóstico por imagen , Apendicitis/etiología , Apendicitis/patología , Femenino , Humanos , Complicaciones Posoperatorias/epidemiología , Embarazo , Complicaciones del Embarazo/diagnóstico por imagen , Complicaciones del Embarazo/etiología , Complicaciones del Embarazo/patología , Estudios Retrospectivos
8.
Eur J Pain ; 18(7): 902-13, 2014 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-24449533

RESUMEN

Appropriate pain therapy prior to diagnosis in patients with acute abdominal pain remains controversial. Several recent studies have demonstrated that pain therapy does not negatively influence either the diagnosis or subsequent treatment of these patients; however, current practice patterns continue to favour withholding pain medication prior to diagnosis and surgical treatment decision. A systematic review of PubMed, Web-of-Science and The-Cochrane-Library from 1929 to 2011 was carried out using the key words of 'acute', 'abdomen', 'pain', 'emergency' as well as different pain drugs in use, revealed 84 papers. The results of the literature review were incorporated into six sections to describe management of acute abdominal pain: (1) Physiology of Pain; (2) Common Aetiologies of Abdominal Pain; (3) Pre-diagnostic Analgesia; (4) Pain Therapy for Acute Abdominal Pain; (5) Analgesia for Acute Abdominal Pain in Special Patient Populations; and (6) Ethical and Medico-legal Considerations in Current Analgesia Practices. A comprehensive algorithm for analgesia for acute abdominal pain in the general adult population was developed. A review of the literature of common aetiologies and management of acute abdominal pain in the general adult population and special patient populations seen in the emergency room revealed that intravenous administration of paracetamol, dipyrone or piritramide are currently the analgesics of choice in this clinical setting. Combinations of non-opioids and opioids should be administered in patients with moderate, severe or extreme pain, adjusting the treatment on the basis of repeated pain assessment, which improves overall pain management.


Asunto(s)
Dolor Abdominal/tratamiento farmacológico , Analgésicos/uso terapéutico , Servicio de Urgencia en Hospital , Manejo del Dolor , Enfermedad Aguda , Humanos
9.
J Cancer ; 4(3): 262-9, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23459716

RESUMEN

Peritoneal surface malignancy (PSM) is a frequent occurrence in the natural history of colorectal cancer (CRC). Although significant advances have been made in screening of CRC, similar progress has yet to be made in the early detection of PSM of colorectal cancer origin. The fact that advanced CRC can be confined to the peritoneal surface without distant dissemination forms the basis for aggressive multi-modality therapy consisting of cytoreductive surgery (CRS) plus hyperthermic intra-peritoneal chemotherapy (HIPEC), and neoadjuvant and/or adjuvant systemic therapy. Reported overall survival with complete CRS+HIPEC exceeds that of systemic therapy alone for the treatment of PSM from CRC, underscoring the advantage of this multi-modality therapeutic approach. Patients with limited peritoneal disease from CRC can undergo complete cytoreduction, which is associated with the best reported outcomes. As early or limited peritoneal carcinomatosis is undetectable by conventional imaging modalities, second look laparotomy is an important means to identify disease in high-risk patients at a stage most amenable to complete cytoreduction. This review focuses on the identification of patients at risk for PSM from CRC and discusses the role of second look laparotomy.

11.
Tissue Antigens ; 78(3): 203-7, 2011 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-21644933

RESUMEN

This work presents survival data of 42 melanoma patients at high risk for disease recurrence who received an allogeneic melanoma vaccine composed of three cell lines, each matching at least one allele of the recipient's human leukocyte antigen (HLA)-A and -B loci. The 5-year overall survival (OS) rate and disease-free survival (DFS) compared favorably with the standard interferon-α regimen. Interestingly, patients bearing HLA-B35 had significantly better OS and DFS (OS of 100% and DFS of 90% for HLA-B35 vs 56% and 23%, for the non-B35 patients). In contrast, patients expressing HLA-B07 did not fare well with the vaccine. Although the data include a relatively small cohort of patients, it strongly hints toward a correlation between HLA types and potential benefit from anticancer immunotherapy.


Asunto(s)
Vacunas contra el Cáncer/uso terapéutico , Antígeno HLA-B35/genética , Melanoma/terapia , Neoplasias Cutáneas/terapia , Adolescente , Adulto , Niño , Preescolar , Femenino , Antígeno HLA-B35/inmunología , Prueba de Histocompatibilidad , Humanos , Lactante , Interferón-alfa/uso terapéutico , Metástasis Linfática , Linfocinas , Masculino , Melanoma/inmunología , Melanoma/patología , Persona de Mediana Edad , Fenotipo , Neoplasias Cutáneas/inmunología , Neoplasias Cutáneas/secundario , Tasa de Supervivencia , Adulto Joven
12.
J Surg Oncol ; 102(6): 565-70, 2010 Nov 01.
Artículo en Inglés | MEDLINE | ID: mdl-20976729

RESUMEN

BACKGROUND: Evaluation of peritoneal metastases by computed tomography (CT) scans is challenging and has been reported to be inaccurate. METHODS: A multi-institutional prospective observational registry study of patients with peritoneal carcinomatosis from colorectal cancer was conducted and a subset analysis was performed to examine peritoneal cancer index (PCI) based on CT and intraoperative exploration. RESULTS: Fifty-two patients (mean age 52.6 ± 12.4 years) from 16 institutions were included in this study. Inaccuracies of CT-based assessment of lesion sizes were observed in the RUQ (P = 0.004), LLQ (P < 0.0005), RLQ (P = 0.003), distal jejunum (P = 0.004), and distal ileum (P < 0.0005). When CT-PCI was classified based on the extent of carcinomatosis, 17 cases (33%) were underestimations, of which, 11 cases (21%) were upstaged from low to moderate, 4 cases (8%) were upstaged from low to severe, and 2 cases (4%) were upstaged from moderate to severe. Relevant clinical discordance where an upstage occurred to severe carcinomatosis constituted a true inaccuracy and was observed in six cases (12%). CONCLUSIONS: The actual clinical impact of inaccuracies of CT-PCI was modest. CT-PCI will remain as a mandatory imaging tool and may be supplemented with other tools including positron emission tomography scan or diagnostic laparoscopy, in the patient selection for cytoreductive surgery and hyperthermic intraperitoneal chemotherapy.


Asunto(s)
Carcinoma/diagnóstico por imagen , Carcinoma/secundario , Neoplasias Colorrectales/patología , Neoplasias Peritoneales/diagnóstico por imagen , Neoplasias Peritoneales/secundario , Tomografía Computarizada por Rayos X , Carcinoma/tratamiento farmacológico , Carcinoma/cirugía , Humanos , Laparotomía , Persona de Mediana Edad , Estadificación de Neoplasias , Selección de Paciente , Neoplasias Peritoneales/tratamiento farmacológico , Neoplasias Peritoneales/cirugía
13.
Br J Cancer ; 94(5): 681-5, 2006 Mar 13.
Artículo en Inglés | MEDLINE | ID: mdl-16495929

RESUMEN

The presence of metastases in lymph nodes is the most powerful prognostic factor in breast cancer patients. Routine histological examination of lymph nodes has limited sensitivity for the detection of breast cancer metastases. The aim of the present study was to develop a multimarker reverse transcriptase-polymerase chain reaction (RT-PCR) assay for the detection of minimal residual disease in sentinel nodes of breast cancer patients. RNA was extracted from 30 sentinel lymph nodes (SLN) obtained from 28 patients, three primary breast cancers (positive controls), three lymph nodes from patients with benign diseases, and peripheral blood lymphocytes of 10 healthy volunteers (negative controls). RT-PCR was performed using the following markers; cytokeratin (CK)-19, NY-BR-1 and mammaglobin B. RT-PCR results were compared to enhanced histopathologic examination and immunohistochemistry (IHC). All three positive controls showed strong PCR amplification for all three markers. None of the 13 negative controls was amplified by any of the three markers. Among the 30 SLN analysed, breast cancer metastases were detected in six SLNs by routine histology, in eight by IHC and in 15 by RT-PCR. We conclude that a multimarker RT-PCR assay probing for NY-BR-1, mammaglobin-B, and CK-19 is more sensitive compared to enhanced pathologic examination. This method may prove to be of value in breast cancer staging and prognosis evaluation.


Asunto(s)
Adenocarcinoma/genética , Adenocarcinoma/patología , Biomarcadores de Tumor/análisis , Neoplasias de la Mama/genética , Neoplasias de la Mama/patología , Biopsia del Ganglio Linfático Centinela , Estudios de Casos y Controles , Cartilla de ADN , Femenino , Humanos , Inmunohistoquímica , Ganglios Linfáticos/patología , Metástasis Linfática , Estadificación de Neoplasias/métodos , Neoplasia Residual , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Sensibilidad y Especificidad
14.
Tech Coloproctol ; 9(1): 42-4, 2005 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-15868498

RESUMEN

Meconium ileus equivalent is one of the lesser-known manifestations of cystic fibrosis. It manifests as distant small bowel obstruction caused by meconium-like stool plugs and occurs mostly in adult patients. With the improved overall survival of patients with cystic fibrosis, general surgeons may encounter this condition more often in the future. We treated a 19-year-old woman with cystic fibrosis who presented with complete distal small bowel obstruction. Medical therapy with Gastrografin and N-acetylcysteine failed to resolve the obstruction. At surgery, a meconium-like plug in the distal ileum was manually pushed into the colon with subsequent relief of symptoms. Meconium ileus equivalent should be considered and treated in cystic fibrosis patients presenting with small bowel obstruction.


Asunto(s)
Fibrosis Quística/complicaciones , Obstrucción Intestinal/cirugía , Adulto , Femenino , Humanos , Obstrucción Intestinal/complicaciones , Intestino Delgado/cirugía , Meconio
15.
Neurogastroenterol Motil ; 16(1): 75-80, 2004 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-14764207

RESUMEN

Current knowledge on the morphology and physiology of interstitial cells of Cajal (ICC) is mostly based on animal studies, and information about the function of these cells in humans is scarce. There is ultrastructural evidence that ICC in the myenteric region (ICC-MP) of the small intestine of several species are connected by gap junctions, but these were not observed in the human small intestine. The aim of the present study was to determine whether functional coupling also exists among ICC-MP in the human ileum. We visualized ICC-MP in live tissues using Nomarski optics, and verified their identity by staining for c-Kit. ICC were injected intracellularly with the fluorescent dye Lucifer yellow, which crosses gap junctions. In most cases the labelled cells had oval somata with two primary processes. At normal pH (7.3-7.4) only 20.2% (21/104) of the injected ICC were coupled to other ICC. However, at pH 7.8-7.9 coupling incidence increased to 74.5% (35/47, P < 0.0001). The injected cells were coupled to one to 35 other ICC. Octanol blocked coupling in all cases. Apparently, gap junctions interconnect ICC in the human small intestine. Coupling was enhanced by a small increase in pH, suggesting that it may be under physiological control.


Asunto(s)
Comunicación Celular , Íleon/citología , Íleon/inervación , Uniones Intercelulares/ultraestructura , Plexo Mientérico/ultraestructura , Adulto , Células Cultivadas , Femenino , Colorantes Fluorescentes , Humanos , Concentración de Iones de Hidrógeno , Íleon/ultraestructura , Isoquinolinas , Masculino , Persona de Mediana Edad , Plexo Mientérico/citología , Plexo Mientérico/fisiología
16.
Gut ; 52(11): 1598-601, 2003 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-14570729

RESUMEN

BACKGROUND: and aims: Aspirin and other non-steroidal anti-inflammatory drugs have been shown to reduce the risk of colorectal cancer (CRC). Animal models have shown that aspirin is also effective in reducing the density of aberrant crypt foci (ACF). The aim of the study was to evaluate the effect of chronic administration of aspirin on the distribution pattern and histological characteristics of ACF in patients with CRC. METHODS: Our study compared the distribution patterns and histomorphological characteristics of ACF between a group of CRC patients treated with low dose aspirin (n=59) and a control group without aspirin (n=135). ACF were visualised on methylene blue stained macroscopically normal mucosa, microdissected, and serially cut. RESULTS: ACF were found in 75.8% of mucosal samples from the control group and in 36% of mucosal samples from the aspirin treated group, indicating a 47% decline in prevalence of ACF in colonic samples of patients treated with aspirin. A significant reduction from 92.5% to 40% (p<0.0001) was found in distal large bowel samples containing one or more ACF. Similarly, the aspirin treated group showed a reduction in ACF density of 64% and 82%, respectively, in both proximal and distal parts of the colon, indicating a significant reduction in ACF/cm(2) in distal colon samples (p<0.01). The aspirin treated group displayed a 52% reduction in dysplastic ACF although this difference was not statistically significant. CONCLUSIONS: Our study has provided evidence of the effective chemopreventive action of low dose aspirin on ACF in humans.


Asunto(s)
Antiinflamatorios no Esteroideos/uso terapéutico , Anticarcinógenos/uso terapéutico , Aspirina/uso terapéutico , Neoplasias Colorrectales/prevención & control , Lesiones Precancerosas/prevención & control , Adulto , Anciano , Anciano de 80 o más Años , Antiinflamatorios no Esteroideos/administración & dosificación , Aspirina/administración & dosificación , Colon/efectos de los fármacos , Colon/patología , Neoplasias Colorrectales/patología , Esquema de Medicación , Femenino , Humanos , Mucosa Intestinal/efectos de los fármacos , Mucosa Intestinal/patología , Intestino Grueso/efectos de los fármacos , Intestino Grueso/patología , Masculino , Persona de Mediana Edad , Lesiones Precancerosas/patología , Factores de Tiempo
17.
Harefuah ; 140(6): 468-70, 567, 2001 Jun.
Artículo en Hebreo | MEDLINE | ID: mdl-11420841

RESUMEN

INTRODUCTION: Sentinel lymph node biopsy (SLNB) has been recently proven to be an accurate staging method for breast cancer, replacing axillary lymph node dissection (ALND) in selected cases. We present our initial experience and the process of introduction and implementation of SLNB in a University Hospital setting. MATERIAL AND METHODS: 46 SLNB were performed in 42 consecutive female patients with invasive breast cancer. Treatment included 0.4mCi-2mCi of Tc-99m rhenium colloid injected either 2 hours before surgery (0.4 mCi) or the night before surgery (2 mCi). Four milliliters of Patent Blue V were injected peritumoral 10 minutes prior to skin incision in all patients. Following SLNB all women underwent subsequent ALND. Sentinel nodes were processed both with multiple (10-15) H&E sections and immunohistochemistry with cytokeratin antibodies stain. RESULTS: Blue dye, isotope or the combination of both identified 43/46 (93%) of the sentinel lymph nodes. ALND was performed only unilaterally in 4 patients with bilateral breast cancer bringing the total evaluable SLNB to 39. In the 39 patients in whom the sentinel node was successfully identified and underwent ALND, the SLNB was true positive (TP) in 17/39 (44%) true negative (TN) in 20/39 (51%) and false negative in 2/39 [(5%), both T2 lesions] with overall accuracy of 95%. In the last 10 cases all sentinel nodes were successfully identified with 70% TP and 30% TN. CONCLUSIONS: Experience with at least 30-40 consecutive cases for safe implementation of SLNB in clinical practice. Specific training and dedication is required for the entire team involved, including surgeons, nuclear medicine physicians and technicians and pathologists.


Asunto(s)
Neoplasias de la Mama/patología , Biopsia del Ganglio Linfático Centinela , Adulto , Anciano , Neoplasias de la Mama/radioterapia , Neoplasias de la Mama/cirugía , Terapia Combinada , Reacciones Falso Positivas , Femenino , Humanos , Queratinas/análisis , Persona de Mediana Edad , Valor Predictivo de las Pruebas , Radiofármacos/uso terapéutico , Reproducibilidad de los Resultados , Renio/uso terapéutico , Compuestos de Tecnecio/uso terapéutico
18.
Dis Colon Rectum ; 44(1): 27-35; discussion 35-6, 2001 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-11805560

RESUMEN

PURPOSE: Although sphincter-preservation procedures have replaced abdominoperineal resection as the treatment of choice for rectal cancer, a subset of patients with rectal cancer will still require abdominoperineal resection. The use of adjuvant radiotherapy has been shown to reduce local recurrence, and combined modality therapy (chemoradiation) improves survival. Sharp mesorectal excision compared with the classic teaching of blunt retrorectal dissection is also an important component of local control. The primary aim of the present study was to evaluate the postoperative complications associated with neoadjuvant therapy in patients requiring complete rectal excision. Oncologic outcomes for all patients with abdominoperineal resection are also provided. METHODS: A prospective database of 5,634 patients who underwent surgery for colorectal cancer at Memorial Sloan-Kettering Cancer Center between the years 1987 and 1997 was reviewed. Patients with primary adenocarcinoma of the rectum who underwent abdominoperineal resection were identified. In 1,622 patients who were operated on for primary rectal cancer, 292 patients (18 percent) underwent abdominoperineal resection and the rest had a sphincter-preserving procedure. Ten patients were excluded from the study because of prior pelvic irradiation for other cancer (8 patients) and insufficient radiation dose (<4,000 cGy; 2 patients). Neoadjuvant radiotherapy was given to 123 patients and postoperative adjuvant radiotherapy to 65 patients, whereas 94 did not receive radiotherapy. Intraoperative radiotherapy combined with preoperative radiotherapy was administered to 23 of the 123 patients given neoadjuvant radiotherapy. RESULTS: The duration of the operation was significantly longer in both neoadjuvant radiotherapy and intraoperative radiotherapy groups compared with the nonradiotherapy group (P = 0.01 and P < 0.0001, respectively). Estimated blood loss, mean number of blood units transfused per patient, and the percentage of patients being transfused were similar among the groups. Early postoperative complications were significantly higher in the neoadjuvant radiotherapy groups compared with the nonradiotherapy group. Late complications, overall survival, disease-free survival, and local recurrence were not significantly different among the groups. CONCLUSIONS: In patients with cancer of the lower one-third of the rectum, sharp pelvic dissection can result in a low rate of local recurrence even without radiotherapy. The role of preoperative radiotherapy, although associated with higher perineal wound complications, is important in increasing resectability and sphincter-preservation rate. Randomized, prospective trials will be needed to establish the role of adjuvant radiotherapy in patients undergoing sharp mesorectal excision for rectal cancer.


Asunto(s)
Abdomen/cirugía , Adenocarcinoma/cirugía , Instituciones Oncológicas , Terapia Neoadyuvante/efectos adversos , Recurrencia Local de Neoplasia/cirugía , Perineo/cirugía , Neoplasias del Recto/cirugía , Abdomen/patología , Adenocarcinoma/patología , Adenocarcinoma/radioterapia , Anciano , Pérdida de Sangre Quirúrgica , Femenino , Humanos , Tiempo de Internación , Masculino , Persona de Mediana Edad , Recurrencia Local de Neoplasia/patología , Recurrencia Local de Neoplasia/radioterapia , Perineo/patología , Atención Perioperativa , Complicaciones Posoperatorias , Neoplasias del Recto/patología , Neoplasias del Recto/radioterapia , Recto/patología , Recto/efectos de la radiación , Recto/cirugía , Estudios Retrospectivos , Análisis de Supervivencia , Factores de Tiempo , Resultado del Tratamiento
19.
Dis Colon Rectum ; 43(3): 333-7, 2000 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-10733114

RESUMEN

PURPOSE: Nausea and vomiting three to seven days after an elective operation on the colon and rectum remain a persistent clinical problem. Erythromycin, a safe, inexpensive drug that stimulates intestinal motilin receptors, has previously been shown to accelerate gastric emptying significantly after upper gastrointestinal surgery. We aimed to evaluate the effect of postoperative intravenous erythromycin on postoperative ileus in patients undergoing elective surgery for primary colorectal cancer. METHODS: Between May 1998 and April 1999, 150 patients undergoing primary resection of colon or rectal cancer were enrolled in this prospective, randomized, placebo-controlled trial. One hundred thirty-four patients completed the study. Patients were excluded if they had extensive metastatic disease, were taking medications known to interact with erythromycin, or if they required an ileostomy. Patients received either 200 mg of intravenous erythromycin or placebo every six hours. Clinical endpoints were recorded and continuous end-points are presented as mean +/- standard deviation. RESULTS: There were no significant complications related to erythromycin. The erythromycin (n = 65) and placebo (n = 69) groups were comparable regarding demographic and operative factors. The erythromycin group had a slightly shorter length of time to passage of flatus (4.1 +/- 1.3 vs. 4.4 +/- 1.1 days; P = 0.03). There was no significant difference between erythromycin and placebo in time to first solid food (5.6 +/- 1.9 vs. 5.4 +/- 1.8 days), time to first bowel movement (5.2 +/- 1.9 vs. 5.4 +/- 1.3 days), or time to discharge from hospital (7.5 +/- 2.0 vs. 7.6 +/- 2.8 days). There was no difference in the rate of clinically significant nausea (26 vs. 26 percent; P = 0.99), vomiting (17 vs. 16 percent; P = 0.88), or nasogastric tube placement (9 vs. 7 percent; P = 0.68). CONCLUSIONS: Erythromycin does not seem to alter clinically important outcomes related to postoperative ileus in patients undergoing resection for colorectal cancer.


Asunto(s)
Neoplasias Colorrectales/cirugía , Eritromicina/administración & dosificación , Vaciamiento Gástrico/efectos de los fármacos , Fármacos Gastrointestinales/administración & dosificación , Obstrucción Intestinal/tratamiento farmacológico , Náusea y Vómito Posoperatorios/tratamiento farmacológico , Anciano , Método Doble Ciego , Eritromicina/efectos adversos , Femenino , Fármacos Gastrointestinales/efectos adversos , Humanos , Infusiones Intravenosas , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Resultado del Tratamiento
20.
Dis Colon Rectum ; 43(2): 242-8, 2000 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-10696899

RESUMEN

PURPOSE: Clinical guidelines and care maps are important tools for improving quality of care and reducing costs. However, problems of quantity, quality, and accessibility of data recorded in the inpatient medical record have not been solved by the implementation of clinical pathways. Variance or "charting by exception" improves legibility, in part. The aim of the present study was to design a computer-based medical record on a database platform to provide legible notes within a clinical guideline and variance charting framework. METHODS: A computerized database program was written, integrating pre-established clinical guidelines into a user-friendly interface according to modification of the charting by exception principles. Patient care guidelines were provided for each postoperative day. After an initial debugging process by entering data from old charts of patients, the software was installed and its function was evaluated on selected patients. The charting time was compared with the standard charting method. Functionality and user friendliness were assessed. RESULTS: After a brief introduction of ten minutes, all users were able to use the software without difficulties. It was found to be functional and user friendly. The charting time was shorter for the computer-based inpatient medical record compared with the charting time of the standard charts. Because all daily notes were printed on standardized forms on a laser printer, legibility was excellent. CONCLUSIONS: The results of this pilot study suggest that the idea of computer-based inpatient medical record integrating an on-line inpatient medical record in a database platform is feasible. Further development and integration with other hospital information systems and the other health-care providers is required.


Asunto(s)
Colectomía , Enfermedades del Colon/cirugía , Sistemas de Información en Hospital/organización & administración , Ileostomía , Sistemas de Registros Médicos Computarizados/organización & administración , Enfermedades del Recto/cirugía , Bases de Datos Factuales , Humanos , Proyectos Piloto , Estudios Prospectivos , Garantía de la Calidad de Atención de Salud/métodos , Reproducibilidad de los Resultados
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