Discussion
Diagnosis With Brief Discussion
- Diagnosis
- Carcinoid tumor
- Radiologic Findings
- Figs 1. Chest PA shows alobulated margin mass in the left upper lung zone.
Fig 2. Chest CT scan shows a well-marginated, enhancing mass with distal mucoid impaction in the left upper lobe.
Figs 3-4. The apicoposterior segmental bronchus of the left upper lobe is obstructed by the mass.
Bronchoscopic biopsy was performed, and the mass was confirmed as carcinoid tumor pathologically.
- Brief Review
- Carcinoid tumors account for 1~2% of pulmonary neoplasms. They are considered to be neuroendocrine tumors. There are two types of carcinoidtumors, distinguished by histologic features: typical (80~90%) and atypical (10~20%) carcinoid. Most of the typical carcinoids are central in location.And atypical carcinoids are usually located peripherally. The centrally located typical carcinoids tend to manifest earlier with central airway obstruction symptoms and signs than do peripherally located atypical carcinoids. Carcinoids tend to be vascular and may demonstrate intense enhancement. Internal calcification can be seen (30%). Prognosis of carcinoids is dependent on histologic findings; typical carcinoids generally have an excellent prognosis, whereas atypical carcinoids have a worse prognosis.
- References
- 1. Meisinger QC, Klein JS, Butnor KJ, Gentchos G, Leavitt BJ. CT features of Peripheral Pulmonary Carcinoid Tumors. AJR 2011; 197:1073-1080.
2. Chong S, Lee KS, Chung MJ et al. Neuroendocrine Tumors of the Lung: Clinical, Pathologic, and Imaging Findings. RadioGraphics 2006;26(1):41-57.
3. Jeung MY et al. Bronchial carcinoid tumors of the thorax: spectrum of radiologic findings. Radiographics 2002 Mar-Apr;22(2):351-65
4. Muller NL et al. Imaging of the chest. Chapter 26 Carcinoid tumors, pulmonary tumorlets, and neuroendocrine hyperplasia. Volume I. p542-548
- Keywords
- Airway, Neoplasm_Malignant,