Ebook CT amp; MRI pathology – A pocket atlas: Part 2
➤ Gửi thông báo lỗi ⚠️ Báo cáo tài liệu vi phạmNội dung chi tiết: Ebook CT amp; MRI pathology – A pocket atlas: Part 2
Ebook CT amp; MRI pathology – A pocket atlas: Part 2
PART VIAbdomen279GASTROINTESTINALCarcinoidDescription: Carcinoids are rare, slow-growing cancers which start in the lining of the gastrointestinal tra Ebook CT amp; MRI pathology – A pocket atlas: Part 2act.Etiology: Unknown; however, genetic involvement is suspected.Epidemiology: Overall, 1.5 cases per 100,000 population. They occur mostly in the appendix (50%) and small bowel (20%). The ileum is the most frequent site of involvement in the small bowel. Females and older adults are more commonly a Ebook CT amp; MRI pathology – A pocket atlas: Part 2ffected.Signs and Symptoms: The signs and symptoms may be vague. Patients may experience abdominal pain, bleeding, and bowel obstruction.Imaging CharaEbook CT amp; MRI pathology – A pocket atlas: Part 2
cteristics: Primary tumors may be small. Aggressive tumors >2 cm may have a necrotic center. May mimic a lymphoma.CT♦Appear as a bright wall mass withPART VIAbdomen279GASTROINTESTINALCarcinoidDescription: Carcinoids are rare, slow-growing cancers which start in the lining of the gastrointestinal tra Ebook CT amp; MRI pathology – A pocket atlas: Part 2 the arterial phase.MRI♦T1-weighted signal is isointense to muscle.♦Tl-weighted postgadolinium shows bright signal on delayed studies.♦T2-weighted signal may vary from isointense to hyperintense to muscle.Treatment: Surgery' is the treatment of choice. Chemotherapy is helpful for metastatic spread.2 Ebook CT amp; MRI pathology – A pocket atlas: Part 280Prognosis: Results arc better if complete resection of the localized tumor is accomplished.ABFIGURE 1. Carcinoid. Pre- (A) and postcontrast (B) CTsEbook CT amp; MRI pathology – A pocket atlas: Part 2
of the abdomen show an enhancing, partially calcified, stellate mid-abdominal mesenteric mass with radiating bands of fibrosis and retraction of the sPART VIAbdomen279GASTROINTESTINALCarcinoidDescription: Carcinoids are rare, slow-growing cancers which start in the lining of the gastrointestinal tra Ebook CT amp; MRI pathology – A pocket atlas: Part 2PR) image shows similar findings as the axial images. In this image, multiple low-attenuation liver metastases can be seen.281Colorectal CancerDescription: Colorectal cancer (adenocarcinoma of the colon) is the most common malignant tumor affecting (he gastrointestinal tract. Colorectal cancer often Ebook CT amp; MRI pathology – A pocket atlas: Part 2 begins as a polyp which may become malignant if left untreated.Etiology: A number of factors such as heredity, inflammatory bowel disease (e.g., ulceEbook CT amp; MRI pathology – A pocket atlas: Part 2
rative colitis and Crohn’s disease), physical inactivity, overweight and obesity, diabetes, diet, smoking, and alcohol intake are thought to play a roPART VIAbdomen279GASTROINTESTINALCarcinoidDescription: Carcinoids are rare, slow-growing cancers which start in the lining of the gastrointestinal tra Ebook CT amp; MRI pathology – A pocket atlas: Part 2States. African Americans have a higher incidence rate than white people, while Hispanics/Latinos, American Indians, and Alaska natives have a lower incidence rate. Male are slightly more affected than females. Incidence and death rates increase in individuals 50 years and older.Signs and Symptoms: Ebook CT amp; MRI pathology – A pocket atlas: Part 2In its early stage, colorectal cancer is often asymptomatic. Patients may experience rectal bleeding, blood in the stool, cramping lower abdominal paiEbook CT amp; MRI pathology – A pocket atlas: Part 2
n, change in bowel habits, and new onset of constipation.Imaging Characteristics: Primary tumor may be a colon polyp usually >1 cm. Polyps may appear PART VIAbdomen279GASTROINTESTINALCarcinoidDescription: Carcinoids are rare, slow-growing cancers which start in the lining of the gastrointestinal tra Ebook CT amp; MRI pathology – A pocket atlas: Part 2entral low attenuation represents hemorrhage or necrosis.♦Air within the tumor may indicate ulceration.PART VIAbdomen279GASTROINTESTINALCarcinoidDescription: Carcinoids are rare, slow-growing cancers which start in the lining of the gastrointestinal traGọi ngay
Chat zalo
Facebook