• Contrast enhanced computed tomography scan (CT) in a 34-year-old female with an extralobar pulmonary sequestration. (medscape.com)
  • Contrast enhanced computed tomography angiogram in a 34-year-old female with an extralobar pulmonary sequestration (same patient as in the previous image). (medscape.com)
  • This provides improved three-dimensional contrast and spatial resolution compared to conventional computed tomography , where data is obtained and computed from individual sequential exposures. (lookformedical.com)
  • Computed tomography (CT) scanning with contrast and magnetic resonance angiography (MRA) are also highly useful in revealing the presence of systemic arteries, which are the major diagnostic feature of pulmonary sequestration. (medscape.com)
  • In contrast, later development of the accessory lung bud results in the extrapulmonary type that may give rise to communication with the GI tract. (medscape.com)
  • Pulmonary sequestration is an embryonic mass of lung tissue that has no identifiable bronchial communication and that receives its blood supply from 1 or more anomalous systemic arteries. (medscape.com)
  • Pulmonary sequestration is rare, estimated to be 1-6% of congenital lung malformations. (medscape.com)
  • Pulmonary sequestration, or bronchopulmonary sequestration, should be considered in patients with a cystic lung mass. (medscape.com)
  • The two forms of pulmonary sequestration are intrapulmonary, which is surrounded by normal lung tissue, and extrapulmonary, which has its own pleural investment. (medscape.com)
  • however, most references advocate resection of these lesions because of the likelihood of recurrent lung infection, the need for larger resection if the sequestration becomes chronically infected, and the possibility of hemorrhage from arteriovenous anastomoses. (medscape.com)
  • Pulmonary sequestration is believed to result from abnormal diverticulation of foregut and aberrant lung buds. (medscape.com)
  • The most frequently supported theory of sequestration formation involves an accessory lung bud that develops from the ventral aspect of the primitive foregut. (medscape.com)
  • Early embryologic development of the accessory lung bud results in formation of the sequestration within normal lung tissue. (medscape.com)
  • Intrapulmonary sequestration occurs within the visceral pleura of normal lung tissue. (medscape.com)
  • Pulmonary segmentectomy, when combined with hilar and mediastinal lymphadenectomy, is currently considered the gold standard treatment for early-stage lung tumors (NSCLC) smaller than 2 cm in diameter. (biomedcentral.com)
  • The rate of sublobar resection (SLR) for early-stage non-small cell lung carcinoma (NSCLC) is increasing, mainly because of a growing rate of early-stage lung carcinomas and ground-glass opacities. (amegroups.org)
  • It may present as a lung infection on physical examination and chest imaging. (medscape.com)
  • A mass in the posterobasal segment of the lung in young patients with recurrent, localized pulmonary infections is suggestive of ILS. (medscape.com)
  • This article will be based not only on our own experience but also on the "Illustrated anatomical segmentectomy for lung cancer" atlas by Nomori and Okada ( 10 ) that is a unique contribution to this topic and a precious support to the surgeon. (amegroups.org)
  • A diffuse parenchymal lung disease caused by inhalation of dust and by tissue reaction to their presence. (lookformedical.com)
  • The pluripotential tissue from this additional lung bud migrates in a caudal direction with the normally developing lung. (medscape.com)
  • The most common location is in the posterior basal segment, and nearly two thirds of pulmonary sequestrations appear in the left lung. (medscape.com)
  • The disadvantage is that, unlike positron-emission tomography where the positron-electron annihilation results in the emission of 2 photons at 180 degrees from each other, SPECT requires physical collimation to line up the photons, which results in the loss of many available photons and hence degrades the image. (lookformedical.com)
  • 1. Prevalence and anatomical characteristics of subsuperior segment in lung lower lobe. (nih.gov)
  • 20. Atypical bronchus in the right lower lobe: Computed tomography-based analysis. (nih.gov)
  • However, anatomical variations of the bronchi are common, particularly in the right upper lobe of the lung. (biomedcentral.com)
  • We report a case of thoracoscopic resection of the posterior segment of the right upper lobe of the lung. (biomedcentral.com)
  • However, intraoperative exploration revealed that the nodule was located in the posterior segment of the right upper lobe, further showing that the bronchi of the posterior segment of the right lung opened into the bronchus intermedius. (biomedcentral.com)
  • Postoperative retrospective three-dimensional (3D) reconstruction of the lung CT images confirmed that the bronchi of the posterior segment of the right upper lobe originated from the bronchus intermedius. (biomedcentral.com)
  • 17. Pulmonary veins variations with potential impact in thoracic surgery: a computed-tomography-based atlas. (nih.gov)
  • 5. Application of three-dimensional reconstruction of left upper lung lobes in anatomical segmental resection. (nih.gov)
  • With the increasing availability of chest computed tomography (CT), the detection of small pulmonary nodules has become more common, facilitating the development of lung segmental resection. (biomedcentral.com)
  • 3] Arteriography (conventional or CT angiography [CTA]) is helpful in differentiating the lesion from other abnormalities of the lung, such as pulmonary arteriovenous fistulae, but the CT scans should be correlated with clinical presentation and chest radiographs. (medscape.com)
  • A 74-year-old female patient presented with an abnormal shadow on chest computed tomography (CT) at a medical checkup and subsequently visited our hospital. (biomedcentral.com)
  • High-resolution CT scan of the thorax obtained during expiration demonstrates a mosaic pattern of lung attenuation in a patient with asthma. (medscape.com)
  • CT utilizes specific airway and lung density measurements to identify severity of disease and pathology, hyperpolarized gases are used as MRI contrast media to identify small airway disease, and positron emission tomography (PET) can help identify and target lung inflammation. (medscape.com)
  • HRCT has the potential to aid with the functional assessment of the lungs, such as tests of airtrapping and the bronchodilator response. (medscape.com)
  • The increasing application of video-assisted thoracoscopic surgery for lung surgery requires accurately determining lung anatomy to prevent severe complications. (biomedcentral.com)