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ISSN 1405-0099 (Print)

2006, Number 2

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Cir Gen 2006; 28 (2)

Colonoscopy in the diagnosis of colorectal cancer

Montiel-Jarquín A, Castro-Romero M, Martínez-Camacho S, Ramos-Álvarez G, Reyes-Páramo P, Llata-Hernández AM, Zamudio-Huerta L

Language: Spanish
References: 22
Page: 72-76
PDF size: 114.72 Kb.


ABSTRACT

Objective: To assess the diagnostic value of colonoscopy for cancer in patients with suspicion of colon neoplasm.
Setting: Specialty hospital of the National Medical Center “Manuel Ávila Camacho”.
Design: Retrospective, transversal, descriptive.
Statistical analysis: Descriptive statistics, determination of sensitivity, specificity, positive and negative predictive values (PV+ PV-), and positive and negative odds ratio (OR), and multiple regression.
Material and methods: The study period comprised from January 1998 to June 2000. Direct variables analyzed were: diagnosis or not of colon neoplasm by means of colonoscopy, and the secondary variables were age, gender, and symptoms considered as cause for “clinical suspicion” of being a colon neoplasm carrier, these were: abdominal pain, weight loss, alterations in intestinal habits, low intestinal tract hemorrhage, anemia, palpable tumor, positive rectal examination, intestinal occlusion, and fever.
Results: We studied 40 patients with clinical suspicion of colorectal cancer and abnormal signs in the colon by enema study. Colonoscopy was normal in 37 (92.5%) patients. Biopsies were performed in all 40 patients, resulting: 7 benign: 3 (42.8%) unspecific chronic inflammatory processes and 4 (57.2%) normal tissue; 33 malignant: 30 adenocarcinomas (91%), 2 lymphomas (6%), and 1 metastatic carcinoma (3%). Sensitivity was 100%, specificity 42.8% PV+ 89.1%, PV-100%, OR+ 1.74 and OR- 0.
Conclusion: Colonoscopy can discard the presence of malignancy.


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