Enthesis

Dr Jeremy Jones et al.

An enthesis (pl. entheses) is the connective tissue junction where ligaments and tendons attach to bone.

There are two types of entheses:

  • fibrous enthesis
  • fibrocartilage enthesis

Histology

Fibrous enthesis

The ligament or tendon attaches directly to the bone.

Fibrocartilage enthesis

There is a more complex attachment:

  • tendon with longitudinal fibroblasts
  • fibrocartilaginous region of variable thickness where chondrocytes predominate
  • abrupt transition to calcified fibrocartilage (the tidemark, or blue line)
  • bone

Pathology

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Article Information

rID: 52493
Section: Anatomy
Synonyms or Alternate Spellings:
  • Entheses

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