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Related Concept Videos

Lobes of the Cerebrum01:22

Lobes of the Cerebrum

The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
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Gross Anatomy of the Lungs01:17

Gross Anatomy of the Lungs

The lungs are a pair of vital organs connected to the trachea via the left and right bronchi. The base of these organs meets the dome-shaped muscle known as the diaphragm. Encased by the pleurae, the lungs contact the mediastinum. The right lung is shorter yet wider, and has a larger volume than the left lung. The left lung has an indentation known as the cardiac notch. The superior region of the lungs is referred to as the apex, whereas the base is the lower region near the diaphragm. The...
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Cerebrum: Anatomical Overview I01:26

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Cranial Bones: Lateral View01:27

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Related Experiment Video

Updated: May 28, 2026

Systematic Bronchoscopy: the Four Landmarks Approach
04:47

Systematic Bronchoscopy: the Four Landmarks Approach

Published on: June 23, 2023

How many lobes do you see?

Dimos Karangelis1, Georgios I Tagarakis, Serapheim Chlapoutakis

  • 1Department of Cardiovascular and Thoracic Surgery, University of Thessaly, Larissa, Hospital of Thessaly, Larissa, Greece.

Journal of Cardiothoracic Surgery
|October 28, 2011
PubMed
Summary
This summary is machine-generated.

Accessory fissures are rare lung anatomy variations. This case highlights a four-lobed right lung due to an accessory fissure, crucial for thoracic surgeons to identify.

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Area of Science:

  • Thoracic surgery
  • Human anatomy
  • Pulmonology

Background:

  • Accessory fissures are uncommon variations in normal lung anatomy.
  • Incomplete or absent major/minor fissures can complicate lobe differentiation.
  • Understanding these variations is vital for surgical planning.

Observation:

  • A rare intraoperative finding in a 19-year-old male with recurrent pneumothorax.
  • An accessory fissure was identified, dividing the right lower lobe's superior segment from its basal segments.
  • This resulted in a unique four-lobed appearance of the right lung.

Findings:

  • The accessory fissure created a distinct division within the right lower lobe.
  • The patient presented with recurrent pneumothorax, necessitating surgical intervention.
  • The anatomical malformation presented a diagnostic and surgical challenge.

Implications:

  • Accurate identification of accessory fissures is critical for thoracic surgeons.
  • Knowledge of these variations aids in optimal operative assessment.
  • Strategic surgical planning is enhanced by understanding lung anatomical anomalies.