Xiphoid process

Xiphoid Process

The Xiphoid Process (pronounced: /ˈzaɪfɔɪd/), also known as the xiphisternum or metasternum, is a small cartilaginous extension of the lower part of the sternum which is usually ossified in the adult human.

Etymology

The term "Xiphoid" is derived from the Greek word "xiphos" meaning "sword" and "eidos" meaning "shape". It is so named because of its sword-like shape.

Anatomy

The Xiphoid Process is the smallest and most inferior part of the sternum, or breastbone. At birth, it is a thin, roughly triangular region of cartilage that slowly ossifies into a bone and fuses with the body of the sternum. The Xiphoid Process serves as an attachment point for several major muscles, including the diaphragm, the rectus abdominis, and the transversus thoracis.

Clinical Significance

The Xiphoid Process is an important landmark in the human body. It marks the lower limit of the mediastinum and the central part of the diaphragm. The Xiphoid Process can sometimes be felt as a lump in the sternum and can be mistaken for a pathological mass. In some cases, the Xiphoid Process can cause Xiphoidalgia, a rare syndrome characterized by discomfort and pain in the lower sternum.

Related Terms

• Sternum
• Diaphragm
• Rectus abdominis
• Transversus thoracis
• Mediastinum
• Xiphoidalgia

External links

• Medical encyclopedia article on Xiphoid process
• Wikipedia's article - Xiphoid process

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