Anterior diaphragm: variations in the CT appearance

Area of Science:

• Radiology
• Anatomy
• Medical Imaging

Background:

• The anterior diaphragm's appearance on CT scans can vary.
• These variations are influenced by the anatomical relationship between the xiphoid process and the central tendon.
• Accurate interpretation is crucial for diagnosing related pathologies.

Purpose of the Study:

• To describe the typical appearances of the anterior diaphragm on computed tomographic (CT) scans.
• To correlate these appearances with the cephalocaudal relationship of the xiphoid to the central tendon.
• To enhance the diagnostic accuracy for conditions like Morgagni hernias.

Main Methods:

• Analysis of computed tomographic (CT) scans focusing on the anterior diaphragm.
• Categorization of diaphragmatic appearances based on shape and continuity.
• Correlation of imaging findings with anatomical landmarks.

Main Results:

• Three common CT appearances of the anterior diaphragm were identified.
• The most frequent appearance is a smooth, concave curve continuous across the midline.
• Less common appearances include midline discontinuity or a broad, irregular band, with occasional absence of visualization.

Conclusions:

• Variations in anterior diaphragmatic CT appearance are common and predictable.
• Recognizing these variations is essential for differentiating normal anatomy from pathology.
• This understanding aids in the diagnosis of Morgagni hernias and variants of pneumoperitoneum.