Colorectal cancer should with some other with abdominal mass, cramping, rectal bleeding or stool habits change wait for a symptom of intestinal disease, including colon disguised identify the benign tumor or polyps to produce lesions as adenoma, inflammatory polyp, youth sex polyp, wiggle lipoma, hemangioma, leiomyoma etc; E. various inflammatory diseases such as ulcerative colitis, Crobn Addison’s disease, amebic enteritis, Japan schistosomiasis, tuberculosis, colonic diverticulitis, appendicitis surrounding inflammatory bag piece, radioactive enteritis and venereal sex is lymphatic granulation is swollen, benign rectum and canal diseases such as hemorrhoids, anal fissure, anal, etc. Other such as intussusception and sigmoid colon dung block product storage and rare bowel endometriosis also belong to identify list. Due to the large intestine cancer symptom does not special, and intestinal tract diseases clinical manifestations phase overlap, therefore, in clinical diagnosis of many take initiative diagnosis way, eliminate diagnosis with less, suspected patients, ask for details of the history after a careful check, cooperate with fiber colon or X-ray BeiCan enema and pathologic biopsy often can make clear diagnosis. Colon cancer should be mainly with colonic inflammatory disease identification, including Crohn disease, tuberculosis, ulcerative colitis, schistosomiasis granulation is swollen, amebic granulomatous disease etc. In addition, still should with primary liver cancer, biliary disease, appendix abscess photograph differentiate. Colorectal cancer should with the bacterium dysentery, amebic dysentery, hemorrhoids, schistosomiasis, chronic knot photograph differentiate.
1. Shigellosis is main with chronic bacterial dysentery identification. Patients have abdominal pain, diarrhea, tenesmus, mucous symptom such as purulent blood, and defecate number increase, left lower quadrant abdominal tenderness as characteristics. As for chronic bacterial dysentery, can have acute onset, divide afore-mentioned semiotic aggravate outside still fever, headache, loss of appetite. This disease has the epidemiological characteristics, defecate cultivate dysentery bacillus positive. Sigmoidoscopy check bowel mucosa except hyperemia, edema, mucosa ulcer outside a granular, can have a scar and bowel mucous polyps, take purulent make germiculture positive high application celiac trane, norfloxacin, levofloxacin antimicrobial treatment such as effective.
2) amebic dysentery patients present abdominal distension, abdominal pain, diarrhea or tenesmus, bowel movements are mucous take the symptom such as purulent blood, defecate. Chronic type person can have angular, anemia, colon often CuHou can touch, control two ventral and epigastrium often tenderness, easy and colorectal cancer or confused colon cancer. But when this shit has a foul amoebic dysentery, dung can find amebic cyst or nourishing body. Sigmoidoscopy checks to see normal mucosa has typical scattered in ulcer, ulcer bottom scrape take from the materials can be found protozoon anti-bma.
3. Hemorrhoid clinical admiral colorectal misdiagnosed as hemorrhoids. See the real many According to the Shanghai tumor hospital statistics 590 cases of colorectal cancer misdiagnosed hemorrhoid person in 156, the misdiagnosis rate up to 26.4%. The main causes of misdiagnosis system of history didn’t know, but not be refers to check. General hemorrhoids more for painless bleeding, a bright red, not with defecate mixed with the amount of blood loss and expression is defecate surface and the blood, blood, linear bleeding even injection shape bleeding. And colorectal cancer patients of feces often accompanied by mucus and rectal stimulating symptoms, digital rectal examination or sigmoidoscopy examination can identify with colorectal cancer will hemorrhoids.
4. With tuberculosis of tuberculosis of the right lower abdominal pain, diarrhea, paste sample, and abdomen bag piece and systemic tuberculosis poisoning symptoms as feature. Hyperplasia with constipation, type of tuberculosis of as the main performance. X-ray gastrointestinal barium meal can identify with colorectal cancer. Ulcer type of tuberculosis of the intestines, barium in lesions 39% visible signs of filling, not beautiful, but in the upper section of barium bowel lesions is filled with good, called X line barium shadow jumping pine. Mucosal ZhouBi coarse disorderly, bowel wall edge is irregular, sometimes indented. Hyperplasia type of tuberculosis of the intestines period saw proliferative narrow, shrink and deformation, visible filling defect, mucous membrane ZhouBi disorder, wiggle stifness and colon bag disappear. As for fiber colonoscopy, from the lesion site biopsied may attain the farther diagnose.
5. Schistosomiasis schistosomiasis bowel lesions in descending colon, rectum and sigmoid colon and worm eggs deposition in bowel mucosa made local congestion, edema, necrosis, when necrosis after falling off is formed namely superficial mucosal ulceration, clinically, abdominal pain, diarrhea and stool, further appear the symptom such as connective tissue hyperplasia, and finally make bowel wall thickening, serious cause fluctuate a narrow and granuloma, should distinguish with colorectal cancer. But Japan schistosomiasis colon cancer and have certain mutual relationship, therefore, should be in colonoscopy in the lesion site, especially for granulomatous lesion biopsy.
6. Crohn’s disease crohn’s disease for granulomatous inflammatory lesions, concurrent fibrous change and ulcers, good hair in young and middle-aged. Diarrhea general light, every defecate 3 ~ 6 times, abdominal pain more in the right lower quadrant abdominal, after defecate abdominal pain can reduce, about 1/3 cases in the right lower quadrant abdominal can ammonites and bag piece, and can appear anal, anus around abscess. Barium enema have characteristics change, visible bowel wall thickening, stiff neck narrow, mucous membrane, ZhouBi disappear, coarsens, flat, straightened, is a thin strip shadow, Longitudinal form sores and transversely fissure shape ulcer; Normal mucosa is congestion, edema, fibrosis, submit false polypoid lesion called pebble duty. Fiber colon visible mucosa edema, slightly hyperaemia, pebbles, accompanied by circle, sample uplift linear or groove, trelleborg sample ulcers. The patient often concurrent fever, anemia, arthritis and liver disease.
7. Ulcerative colitis UC is a reason unknown rectum and colon chronic inflammatory disease, 95% cases have rectal involvement. In the 20 ~ 50 more see. To clinical symptom such as purulent blood and diarrhea, mucous, abdominal pain and tenesmus as the main performance, so easily confused with colorectal cancer. Fiber colonoscopy visible lesions mucosa is diffuse hyperemia, edema, the mucosal surface in a granular, debaucjed, often have small ulcers or shallow, accompanied by mucus and purulent, the person that weigh ulcer is bigger. Later, colon polyps visible pseudo bag disappear. Gas barium double contrast imaging visible mucosa ZhouBi bulky disorder, ulceration and secretion cover, bowel wall edge can show burr form or jagged, narrow neck stiff, later intestines, colon bag disappear, formation of polyps pseudo after a round or pebble form filling defect.
8. Irritable bowel syndrome IBS is a kind of intestinal function disorder, its occurrence and mental factors. Abdominal pain, diarrhea, constipation and diarrhoea and constipation alternately, indigestion, as its main performance. But generally good conditions, many dung conventional and cultivation of X line barium are negative, irrigation and fiber colonoscopy are of no positive discoveries.