A special brush was divised for cytological examination on the gastric cancer. This is a hard brush in various shape and hardness attached to the flexible stick, 5 cm in diameter, 5 cm in length for the regular size.
The patient is prepared NPO after supper the day before procedure, 300 ml of the physiological saline solution and a-Chymotripsine in the early morning, and gastric irrigation is carried out immediately before the procedure. The polyethylen outer tube with 1.6cm of external diameter, 1.2cm of internal diameter is inserted to the stomach after topical narcosis being applied to the pharynx.
The brush is introduced through the outer tube to reach the lesion suspected by position change and manipulation. The specimen obtained is fresh, big enough to sufficient mass, and examined by the Papanicolaou's method.
This procedure is applied for early cancer, polyp, ulcer, and chronic gastritis, all suspected cancer, with 82.4% accuracy. There are no cases diagnosed as malignant among the non-cancerous cases. This is useful for the cases of pyloric stenosis. The minimal cancerous lesion detected by this method is 0.3×0.5cm2.
