Radioanatomical study of a true tracheal bronchus using multidetector computed tomography

Suzuki, Masayuki; Matsui, Osamu; Kawashima, Hiroko; Takemura, Akihiro; Matsubara, Kosuke; Hayashi, Norio; Koda, Wataru; Shibata, Yoshihiro

doi:10.1007/s11604-009-0405-5

Cited by 31 publications

(28 citation statements)

References 23 publications

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“…Recently, CT findings of TTB have been studied using multidetector computed tomography (MDCT) with multiplanar reconstruction and three-dimensional images (3,5,8,9). Most articles on CT findings of TTB have focused on its incidence, classification, or accompanying anomalies.…”

Section: Introductionmentioning

confidence: 99%

True Tracheal Bronchus: Classification and Anatomical Relationship on Multi-Detector Computed Tomography

Kim

Jou

et al. 2017

J Korean Soc Radiol

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Purpose:To propose the imaging classification of true tracheal bronchus (TTB) on multi-detector computed tomography (MDCT), and to evaluate its anatomical relationship with surrounding structures. Materials and Methods:This study included 44 patients who were diagnosed with TTB on MDCT for 6 years. We classified TTB into five types, based on the existence of the right upper lobe bronchus originating from the right main bronchus and the number of segmental bronchi of TTB. We analyzed the site of origin and the running direction of TTB based on its anatomical relationship with surrounding structures and some ancillary findings. Results: The imaging classification of TTB included Type I (47.7%), Type II (13.6%), Type III (11.4%), Type IV (25.0%), and Type V (2.0%). According to the site of origin of TTB, below the aortic arch (52.3%) and at the level of the aortic arch (43.1%) were the two main sites of origin, whereas the frequency of the site of origin above the azygos arch, at the level of the azygos arch, and below the azygos arch was 27.3%, 38.6%, and 34.1%, respectively. Considering both aortic and azygos arches, below the aortic arch and below the azygos arch were the most common sites of origin (27.3%). With respect to the running direction of TTB, in all cases, TTB passed below the azygos arch to the right upper lobe. There was no statistically significant (p > 0.05) difference in age or sex between types of TTB. Ancillary findings included tracheal stenosis (n = 2), narrowing of the right main bronchus (n = 2), luminal narrowing of TTB and bronchiectasis at the distal portion (n = 1), and a highly located azygos arch above the aortic arch (n = 2). Conclusion:The proposed imaging classification of TTB and its anatomical relationship with surrounding structures will improve our understanding of various imaging features and embryological development of TTB. Radiologists should pay careful attention to evaluation of the airway including the trachea on thoracic imaging. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Index terms

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Section: Introductionmentioning

confidence: 99%

True Tracheal Bronchus: Classification and Anatomical Relationship on Multi-Detector Computed Tomography

Kim

Jou

et al. 2017

J Korean Soc Radiol

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“…The right upper lobe bronchus with its segmental and subsegmental bronchus originating from the trachea is very rare (0.2%) and in that case tracheal bronchus is defined as "pig bronchus" (Ghaye et al, 2001;Yildiz et al;Ming & Lin, 2007;Suzuki et al, 2010) (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

Developmental Anomalies of Bronchial Tree: A Multidetector Computerized Tomography Study

et al. 2013

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SUMMARY:Anomalies of the bronchial tree may cause recurrent acute pulmonary infection and persistent obstruction symptoms. The developmental anomalies of the bronchial tree were presented mostly as case reports with an accompanying anomaly. However in this study, these anomalies were detected in multidetector computerized tomography (MDCT) images which have no reported pathology. Thoracic MDCT images of 400 patients (0-74 years old, 224 male and 176 female) were evaluated. Four tracheal bronchus (1%) were detected. Three of them were displaced type, one of them was pig bronchus. And two accessory cardiac bronchus (0,5%) originated from medial wall of the intermediate bronchus were detected. According to our findings, incidence of tracheal bronchus and accessory cardiac bronchus seems to be higher in Turkish population.

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“…Anomalous bronchus arising below the origin of the upper lobe bronchus is called posteparterial on the right side and posthyparterial on the left side [2]. The tracheal bronchus in our case is a displaced preparterial type -the variant most commonly reported in many series [1][2][3][4][5].…”

Section: Discussionmentioning

confidence: 64%

“…The 'supernumerary' type is a true accessory bronchus as it is associated with normal branching pattern of the upper lobe bronchus [2]. The displaced type occurs more frequently than the supernumerary one [1][2][3][4][5]. Usually, displaced tracheal bronchus ventilates the apical segment of the upper lobe on the right side and apicoposterior segment of the upper lobe on the left side.…”

Section: Discussionmentioning

confidence: 99%

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Tracheal Bronchus Presenting with Recurrent Haemoptysis in an Adult Female

Panigrahi

Pradhan

Mohapatra

2017

Advances in Respiratory Medicine

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Abnormal bronchus arising directly from the trachea or the main bronchus is a rare developmental anomaly of the tracheobronchial tree. In general, tracheal bronchus has been reported in less than 1% of adult patients undergoing bronchoscopy with a male predominance. Tracheal bronchus is classified as -'displaced' and 'supernumerary', the former being the most common type reported. Most patients are asymptomatic; however, cases presenting with cough, haemoptysis or recurrent lung infections are not uncommon. The diagnosis is usually made through computed tomography or bronchoscopy. Awareness of this anomaly may help in timely identification or prevention of perioperative complications during general anaesthesia or resectional thoracic surgery. Herein we report a case of right-sided displaced tracheal bronchus in an adult female presenting with recurrent haemoptysis.

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Radioanatomical study of a true tracheal bronchus using multidetector computed tomography

Abstract: TTB was identified by MDCT with an incidence of 0.31%.

Cited by 31 publications

References 23 publications

True Tracheal Bronchus: Classification and Anatomical Relationship on Multi-Detector Computed Tomography

True Tracheal Bronchus: Classification and Anatomical Relationship on Multi-Detector Computed Tomography

Developmental Anomalies of Bronchial Tree: A Multidetector Computerized Tomography Study

Tracheal Bronchus Presenting with Recurrent Haemoptysis in an Adult Female

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