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Golgi Tendon Organ

Kelly Mrachek, MD
By Kelly Mrachek, MD

Nov 06, 2020

Macrophagic Myofasciitis (MMF), neuro notes, arkana laboratories, neuropathology

In reviewing this skeletal muscle biopsy, what is this structure and what is its function? (Hematoxylin and Eosin stained FFPE tissue section, original magnification:  400x)

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Answer: This is the Golgi Tendon Organ (GTO), a normal finding in skeletal muscle, and it serves as a proprioceptive receptor that senses tension within tendons.  Note the small nerve twig entering the structure from the left (9 o’clock).

 

 

 

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