Can rectal cancer be detected by ultrasound B?

Written by Gong Chun

Oncology

Updated on September 02, 2024

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Can rectal ultrasound detect it? When we perform an abdominal ultrasound for the digestive system, we might see a potential mass in the abdomen, but its specific nature cannot be clearly identified. Therefore, the definitive diagnosis of rectal cancer still relies on biopsy and pathological examination. Thus, it is recommended to go to the hospital and consult a professional oncologist for tests, such as undergoing an endoscopic biopsy or having a surgical procedure to remove and then analyze the pathology to confirm whether it is rectal cancer or not.

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Difference between hemorrhoids bleeding and rectal cancer bleeding

The difference between bleeding from hemorrhoids and rectal cancer is distinct. For hemorrhoids, bleeding is mostly painless and intermittent, primarily manifesting as bright red blood either dripping or spraying into the toilet bowl. Patients may even experience significant blood loss, potentially leading to shock. On the other hand, bleeding from rectal cancer usually involves blood mixed with stool and generally does not involve large volumes. Most patients present with dark-edged stool. Anemia is often detected during routine blood tests, which leads to further investigation with a colonoscopy that may reveal rectal cancer. Therefore, the bleeding characteristics of the two conditions are different. In cases where rectal cancer is suspected, proactive endoscopic examinations are recommended to confirm the diagnosis through tissue pathology, followed by aggressive surgical treatment.

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Is anal prolapse rectal cancer?

Patients with a confirmed diagnosis of rectal cancer may experience varying degrees of anal heaviness and bloating. However, the presence of localized anal bloating and heaviness alone, without further examination, is not sufficient to diagnose rectal cancer. Sometimes, large hemorrhoids or excessive relaxation of the rectal mucosa compressing the anal opening can also result in localized anal bloating and heaviness. Additionally, certain anal or rectal inflammations can stimulate the intestinal mucosa and cause feelings of bloating and heaviness. Therefore, when these symptoms appear, further examinations such as an anoscopy or a colonoscopy are needed to clarify the cause of the symptoms, which will then allow for the selection of appropriate treatment methods. The presence of anal heaviness does not definitively indicate rectal cancer.

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Can a colonoscopy detect colon and rectal cancer?

Colonoscopy can detect colon and rectal cancers. By conducting a colonoscopy, it can be determined whether a space-occupying lesion is in the colon or the rectum. In the workplace, it can also confirm the distance from the anus in centimeters, to guide the next steps of surgical treatment. If a colon or rectal tumor is found during colonoscopy, a pathological biopsy may be needed. Combined with the pathological biopsy, a diagnosis can be made whether the patient has colon cancer or rectal cancer. At the same time, colonoscopy can also detect other diseases, such as colon polyps, ulcerative colitis, Crohn's disease of the colon, and so on.

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Gastroenterology

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Can a colonoscopy detect rectal cancer?

Colonoscopy can detect colon and rectal cancer. It is the most important and primary method for examining colonic mucosal lesions. The large intestine includes the cecum, colon, and rectum. Colonoscopy allows direct visual inspection of lesions, including the size and color of the lesions, and whether there are ulcers and erosion, the nature of any attachments, etc. It also allows for direct biopsy. Firstly, it can assess the texture of the lesion, such as whether it is soft, hard, or brittle. Moreover, the biopsied sample can be analyzed histologically to determine the benign or malignant nature, depth of infiltration, etc. Different pathological characteristics have different prognoses and treatment methods, suitable for early cancers treatable under endoscopy, or those that can be removed during the process of the colonoscopy.

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Is the survival rate for rectal cancer high?

Rectal cancer is primarily a malignant tumor, and there are individual differences in treatment, even differing biological behaviors. Some people discover it early, while others find it later, sometimes even with multiple metastases. If it is diagnosed in a later stage, naturally, the patient's survival period is shorter. Surgical treatment of rectal cancer is one aspect, and subsequent measures to possibly extend the patient's survival include radiotherapy, chemotherapy, targeted therapy, immunotherapy, etc.