Cystic degeneration of a carcinoid lung tumor: an uncommon cause of an intrathoracic cyst.
ABSTRACT Carcinoid tumor is a rare, slow-growing neuroendocrine tumor that accounts for less than 1% of all lung tumors. It occurs most commonly in the midgut, then the lung, and usually presents as a solid lesion. We report a patient with a typical carcinoid tumor that had undergone cystic degeneration.
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ABSTRACT: Carcinoid tumors are unusual and most reports are anecdotal or limited in number. A series of 2837 cases was published in 1975. No recent large series is available. The authors evaluated 5468 cases identified by the Surveillance, Epidemiology, and End Results (SEER) program of the National Cancer Institute (NCI) from 1973 to 1991 together with 2837 carcinoid cases previously registered by 2 earlier NCI programs. To the authors' knowledge, the 8305 carcinoid tumors analyzed represent the largest current epidemiology series to date. The most frequent sites for carcinoids were the gastrointestinal (GI) tract (73.7%) and the bronchopulmonary system (25.1%). Within the GI tract, most occurred in the small bowel (28.7%), appendix (18.9%), and rectum (12.6%). For all sites, age-adjusted incidence rates were highest in African American males (2.12 per 100,000 population per year). Associated noncarcinoid tumors were frequent in conjunction with small intestinal (16.6%), appendiceal (14.6%), and colonic carcinoids (13.1%). The highest percentage of nonlocalized lesions were noted for pancreatic (76.1%), colonic (71.2%), and small intestinal carcinoids (70.7%) and this corresponded to their poor 5-year survival rates (34.1%, 41.6%, and 55.4%, respectively). The best 5-year survival rates were recorded for appendiceal (85.9%), bronchopulmonary (76.6%), and rectal carcinoids (72.2%). These exhibited invasive growth or metastatic spread in only 35.4%, 27.2%, and 14.2% of cases, respectively. Carcinoids appear to have increased in incidence in the past 20 years. In part, this may be due to different surgical rules of the various registries, improved diagnostic technology, and increased awareness. A cumulative analysis of all types of carcinoid tumors in the SEER group indicates that in 45.3% metastases are already evident at the time of diagnosis. The overall 5-year survival rate of all carcinoid tumors regardless of site was 50.4% +/- 6.4%.Cancer 03/1997; 79(4):813-29. · 4.90 Impact Factor
Article: Carcinoid tumour.[Show abstract] [Hide abstract]
ABSTRACT: Carcinoid tumours are often indolent asymptomatic tumours. However, a small but significant proportion are malignant and difficult to manage. Multiple endocrine neoplasia type 1 (MEN-1) may be associated with carcinoid tumours and should therefore be considered in the investigation of these patients. This review puts into context the use of newer imaging modalities, including octreotide scintigraphy. The therapeutic treatment options are discussed, including the use of octreotide, the role of receptor-targeted therapy, hepatic-artery embolisation, and the arguments against chemotherapy. We review the need for careful patient selection when considering curative and palliative surgery, including liver transplantation. We conclude that there are now better diagnostic tools and therapeutic options available for those patients with malignant carcinoid tumours, and that these patients are best managed by a multidisciplinary approach. Earlier detection and treatment of these tumours should lead to improved quality of life and survival, which, ideally, should be assessed in formal trials.The Lancet 10/1998; 352(9130):799-805. · 39.21 Impact Factor
Article: Carcinoid tumors.New England Journal of Medicine 04/1999; 340(11):858-68. · 54.42 Impact Factor