Colorectal Cancer.- Introduction: Colorectal Cancer.- Poorly Differentiated Colorectal Adenocarcinoma (Methodology).- Colorectal Cancer: Immunohistochemical Diagnosis with Heterogeneous Nuclear Ribonucleoprotein K.- Metastases and Recurrence of Colorectal Cancer: Diagnostic Role of Immunoscintigraphy.- Colorectal Cancer Diagnosis Using DNA Levels in Blood and Stool.- Colorectal Carcinoma: Identification of MicroRNAs Using Real-Time Polymerase Chain Reaction.- Colorectal Cancer: Optimization of the Combination of 5-Fluorouracil and Irinotecan.- Detection of Abdominal Abscesses After Colorectal Surgery: Ultrasonography, Computed Tomography and Gallium Scan.- Antimetastatic Therapy in Colorectal Cancer: Role of Tumor Cell Matrix Metalloproteinase 9 (Methodology).- Endoscopic Resection of Early Colorectal Tumors: Novel Diagnostic and Therapeutic Techniques.- Role of Stromal Variables in Development and Progression of Colorectal Cancer.- Quantitative Assessment of Colorectal Cancer Perfusion: Perfusion Computed Tomography and Dynamic Contrast Enhanced Magnetic Resonance Imaging.- Positron Emission Tomography and Colorectal Cancer.- Prognostic Significance of Protein Markers in Colorectal Cancer Stratified by Mismatch Repair Status.- Colorectal Cancer: Lactate Dehydrogenase (LDH) Activity as a Prognostic Marker.- Colon Cancer.- Detection of Tumor Cells in Lymph Nodes of Colon Cancer Patients Using Real-Time Quantitative Reverse Transcription-Polymerase Chain Reaction.- Colon Cancer: Laparoscopic Surgery.- Sentinel Node-Based Immunotherapy of Colon Cancer.- Rectal Cancer.- Rectal Cancer: Preoperative Staging Using Endorectal Ultrasonography (Methodology).- Rectal Cancer: Spectral Imaging and Immunohistochemistry of Thymidylate Synthase.- Cancer of the Rectum: Abdominoperinealand Sphincter-Saving Resections.- Chemoradiation for Rectal Cancer.- Resectable Rectal Cancer: Preoperative Short-Course Radiation.- Preoperative Chemoradiotherapy Allows for Local Control in Rectal Cancer – But Distant Metastases Remain an Unsolved Problem.- Locally Advanced Rectal Cancer: Combined Chemotherapy During Preoperative Radiation Therapy.- Colorectal Liver Metastases.- Colorectal Cancer Liver Metastases: Neoadjuvant Therapy with Bevacizumab.- Colorectal Liver Metastases: Radiofrequency Ablation.- Anal Cancer.- Anal Squamous Cell Carcinomas: Diagnosis Using p63 Immunohistochemistry.- Molecular and Clinicopathologic Features Which Predict Outcome in Patients with Anorectal Melanoma.