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The diagnostic potentialities of laser spectroand videofluorescence endoscopy, complex transabdominal US examination, dynamic multihelical computed tomography (MHCT) with the possibility of constructing multiplanar reformations, and virtual gastroscopy were studied with a view to diagnosing gastric cancer (GC). It was established that laser spectral fluorescence with the drug Alasens (5-aminolevulinic acid) is a highly revealing method for diagnosis and differential diagnosis of GC. The sensitivity of the method is 96%, and its specificity is 78%. Well-defined videofluorescence was noted in 91.3% of pa‐ tients with GC. The possibility of detecting cancer with complex trans-ultrasonography in the pyloroantral division and in the lower third of the body of the stomach constitutes 95.6% attaining absolute values in T3 and T4. Dynamic MHCT allows 97% detection of GC attaining absolute values, beginning with T2 invasion depth; tumor localization is ir‐ relevant. Comparative visual assessment of the quality of a virtual image and conven‐ tional video esophagogastroduodenoscopy (EGDS) was made. The study demonstrated a sufficiently high level of virtual images whose quality was not inferior to that of conven‐ tional images in intraluminal tumor growth. The indications for the application of this technique require further specification.

Modern Technologies for Timely Detection and Differential Diagnosis of Gastric Cancer