Boyden classification of bronchi

Nader and Assoc Prof Craig Hacking ◉ ◈ et al.

The Boyden classification of bronchi refers to the standard nomenclature used to describe bronchopulmonary segmental anatomy.

Each lung has 10 segments, however on the left, the first two segments share a common trunk and are hence B1/2. Also given the shared trunk on the left of the lower lobe anterior and medial basal segments forming the anteromedial segment, B7 is omitted.

Classification

The right lung is subdivided into three lobes with ten segments. The notation in brackets refers to the Boyden classification. The number designates the secondary lobar bronchus.

right upper lobe
- apical segment (B1)
- posterior segment (B2)
- anterior segment (B3)
right middle lobe (or more correctly - just middle lobe)
- lateral segment (B4)
- medial segment (B5)
right lower lobe
- superior segment (B6)
- medial segment (B7)
- anterior segment (B8)
- lateral segment (B9)
- posterior segment (B10)

The left lung is subdivided into two lobes and thereby, into eight segments. The notation in brackets refers to the Boyden classification.

left upper lobe
- apicoposterior segment (B1/2)
- anterior segment (B3)
- superior lingular segment (B4)
- inferior lingular segment (B5)
left lower lobe
- superior segment (B6)
- anteromedial segment (B8)
- lateral segment (B9)
- posterior segment (B10)

References

Anatomy: Thoracic

Anatomy: Thoracic

thoracic skeleton
- thoracic cage
  - ribs
    - typical ribs
    - atypical ribs
    - variant anatomy
  - costal cartilage
  - sternum
- thoracic spine
- articulations
muscles of the thorax
spaces of the thorax
thoracic viscera
- tracheobronchial tree
  - trachea
- lungs
- heart
  - cardiac chambers
  - heart valves
  - pectinate muscles
  - cardiac fibrous skeleton
    - aortic annulus
  - coronary arteries
    - coronary arterial dominance
    - myocardial segments
    - left main coronary artery (LMCA)
      - ramus intermedius artery (RI)
      - circumflex artery (LCx)
        
        obtuse marginal branches (OM1, OM2, etc))
        
        Kugel's artery
      - left anterior descending artery (LAD)
        
        diagonal branches (D1, D2, etc)
        
        septal perforators (S1, S2, etc)
    - right coronary artery (RCA)
      - conus artery
      - sinoatrial nodal artery
      - acute marginal branches (AM1, AM2, etc)
      - inferior interventricular artery (PDA)
      - posterior left ventricular artery (PLV)
    - congenital anomalies
  - innervation of the heart
  - fetal circulation
    - foramen ovale
  - atrial septum
    - fossa ovale
  - endocardium
  - myocardium
  - pericardium
    - epicardium
    - epicardial fat pad
    - pericardial space
      - oblique pericardial sinus
      - transverse pericardial sinus
      - pericardial recesses
        
        aortic recesses
        
        superior aortic recess
        
        inferior aortic recess
        
        pulmonic recesses
        
        right pulmonic recess
        
        left pulmonic recess
        
        postcaval recess
        
        pulmonary venous recesses
        
        right pulmonary venous recess
        
        left pulmonary venous recess
    - pericardial ligaments
- esophagus
  - Zenker diverticulum
  - Killian-Jamieson diverticulum
- thymus
  - retrocaval thymus
- breast
  - nipple-areola complex
  - terminal ductal lobular unit
  - axillary tail
    - foramen of Langer
  - mammary fat
  - Montgomery glands
    - Montgomery tubercles
  - Cooper ligaments
    - crests of Duret
  - retromammary space (Chassaignac bursa)
  - lymphatic drainage
    - Sappey plexus
    - intramammary lymph nodes
  - variants
    - supranumerary nipple (polythelia)
    - accessory breast tissue (polymastia)
    - breast hypoplasia
    - amastia
    - amazia
blood supply of the thorax
- arteries
  - thoracic aorta (development)
  - pulmonary trunk
    - left pulmonary artery
      - aberrant left pulmonary artery
    - right pulmonary artery
- veins
  - superior vena cava (SVC)
    - superior cavoatrial junction
    - variant anatomy
  - inferior vena cava (IVC)
    - inferior cavoatrial junction
  - coronary veins
    - cardiac veins which drain into the coronary sinus
      - great cardiac vein
      - middle cardiac vein
      - small cardiac vein
      - posterior vein of the left ventricle
      - vein of Marshall (oblique vein of the left atrium)
    - anterior cardiac veins
    - venae cordis minimae (smallest cardiac veins or thebesian veins)
  - pulmonary veins
    - bronchial veins
  - thoracoepigastric vein
lymphatics
innervation of the thorax

Article information

rID: 41263

System: Chest

Section: Anatomy, Classifications

Synonyms or Alternate Spellings:

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Cases and figures

Figure 1: right sided bronchiFigure 1: right sided bronchi

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Figure 2: left sided bronchiFigure 2: left sided bronchi

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