xColorectal cancer (CRC) is common, affecting >40,000 people a year in the UK. Most cancers are sporadic but a few, such as those occurring at a younger age, have a clear genetic basis. Most are situated in the rectum or rectosigmoid and cause rectal bleeding, often with a looser or more frequent stool. Right-sided cancers typically result in anaemia, because the blood in the stool is occult and unnoticed by the patient. Almost all symptoms of malignancy can also be caused by benign disease. Diagnosis relies on luminal imaging, with colonoscopy being the gold standard.
Elsevier’s Medicine is a continually updated, evidence-based learning resource for trainees. It is an essential tool to help trainees achieve their postgraduate medical qualification, wherever you are in the world. It provides a concise overview of the latest medical knowledge and practice based upon the UK Core Medical Training curriculum, with each article written by invited qualified experts. Given its comprehensive coverage of internal medicine, this resource is also an ideal companion for GPs and consultants in the acute medicine setting.
xColorectal cancer is common with a lifetime risk of 5% and remains the second most common cause of cancer death, with low 5-year survival (55%). Early detection through bowel screening and surveillance of high-risk groups aims to identify early disease. Specialist surgery, despite the associated morbidity and mortality, offers the best chance of cure. Isolated multiorgan metastatic disease is increasingly resected, with good results. This article summarizes management of colorectal cancer, with a focus on early rectal and polyp cancers, which can pose management dilemmas. 

A letter published in the NEJM in 1980 was later described by the journal as having been "heavily and uncritically cited"[14] to claim that addiction due to use of opioids was rare, and its publication in such an authoritative journal was used by pharmaceutical companies to push widespread use of opioid drugs, leading to an addiction crisis in the U.S. and other countries.[15]
In April 2001, Druker et al. reported a targeted therapy for chronic myelogenous leukemia. Based on the knowledge that BCR-ABL, a constitutively activated tyrosine kinase, causes CML, the authors tested with success an inhibitor of this tyrosine kinase in patients who had failed first-line therapy. The finding helped begin the era of designing cancer drugs to target specific molecular abnormalities.[18]
xColorectal cancer (CRC) is common, affecting >40,000 people a year in the UK. Most cancers are sporadic but a few, such as those occurring at a younger age, have a clear genetic basis. Most are situated in the rectum or rectosigmoid and cause rectal bleeding, often with a looser or more frequent stool. Right-sided cancers typically result in anaemia, because the blood in the stool is occult and unnoticed by the patient. Almost all symptoms of malignancy can also be caused by benign disease. Diagnosis relies on luminal imaging, with colonoscopy being the gold standard.
xColorectal cancer is common with a lifetime risk of 5% and remains the second most common cause of cancer death, with low 5-year survival (55%). Early detection through bowel screening and surveillance of high-risk groups aims to identify early disease. Specialist surgery, despite the associated morbidity and mortality, offers the best chance of cure. Isolated multiorgan metastatic disease is increasingly resected, with good results. This article summarizes management of colorectal cancer, with a focus on early rectal and polyp cancers, which can pose management dilemmas.
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