Organ
Right middle lobe
Anterior right lobe between two fissures
High-yield
Lateral is S4 and medial is S5. These are different names from the two left lingular segments despite corresponding numbers.
Overview
The middle lobe lies between the superior and inferior right lobes, near the heart and anterior chest wall. It has two principal segmental territories.
Reference facts
- Location
- Anterior right lung between the horizontal and oblique fissures
- Parts
- Lateral S4 and medial S5
- Blood supply
- Middle lobar branches of the right pulmonary artery
- Innervation
- Right pulmonary plexus
- Relations
- Right heart border medially and chest wall anteriorly; hilar nodes near its bronchus
- Function
- Gas exchange in the middle lobar territory
Clinical correlation
Middle lobe syndrome describes persistent or recurrent loss of aeration. Causes may involve an obstructed bronchus or nonobstructive inflammatory disease, rather than one universal mechanical defect.
Frequently asked questions
Where is the right middle lobe located?
Anterior right lung between the horizontal and oblique fissures.
What does the right middle lobe do?
Gas exchange in the middle lobar territory.
What are the parts of the right middle lobe?
Lateral S4 and medial S5.
What is the blood supply of the right middle lobe?
The right middle lobe is supplied by the middle lobar branches of the right pulmonary artery.