Surface Projection of the Spleen: Anatomical Location and Clinical Considerations

The spleen is an important organ located in the left upper quadrant of the abdomen. It plays a vital role in filtering blood, immune function, and red blood cell recycling.

Anatomical Location of the Spleen

The spleen is positioned between the 9th and 11th ribs on the left side. It lies posterior to the stomach and is adjacent to the diaphragm. The organ is enveloped by the peritoneum except at the hilum.

Surface Projection

• The superior border aligns with the 9th rib.
• The inferior border typically extends to the 11th rib.
• The spleen does not extend beyond the midaxillary line.

Clinical Considerations

The spleen's anatomical location is crucial for clinical assessments:

• Splenomegaly: Enlargement of the spleen can shift its projection, making it palpable below the costal margin.
• Trauma Risk: Due to its position near the ribcage, spleen injuries are common in abdominal trauma.
• Percussion & Palpation: A normal spleen is usually non-palpable, but clinical techniques help detect abnormalities.

Imaging and Diagnosis

Ultrasound and CT scans are frequently used to assess spleen size and detect pathological conditions.