Book contents
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Section 1 Shoulder
- Section 2 Arm
- Section 3 Elbow
- Section 4 Forearm
- Section 5 Wrist
- Section 6 Hand
- Section 7 Hip and Pelvis
- Section 8 Thigh
- Section 9 Leg
- Section 10 Ankle
- Section 11 Foot
- Case 70 Master knot of Henry
- Case 71 Tarsal tunnel syndrome
- Case 72 Great toe sesamoids: osteonecrosis versus stress fracture
- Case 73 Lisfranc fracture/dislocation
- Case 74 Navicular stress fracture: importance of advanced imaging
- Section 12 Tumors/Miscellaneous
- Index
- References
Case 70 - Master knot of Henry
from Section 11 - Foot
Published online by Cambridge University Press: 05 July 2013
- Frontmatter
- Contents
- List of contributors
- Foreword
- Preface
- Section 1 Shoulder
- Section 2 Arm
- Section 3 Elbow
- Section 4 Forearm
- Section 5 Wrist
- Section 6 Hand
- Section 7 Hip and Pelvis
- Section 8 Thigh
- Section 9 Leg
- Section 10 Ankle
- Section 11 Foot
- Case 70 Master knot of Henry
- Case 71 Tarsal tunnel syndrome
- Case 72 Great toe sesamoids: osteonecrosis versus stress fracture
- Case 73 Lisfranc fracture/dislocation
- Case 74 Navicular stress fracture: importance of advanced imaging
- Section 12 Tumors/Miscellaneous
- Index
- References
Summary
Imaging description
The master knot of Henry is best seen on coronally oriented cross-sectional imaging such as CT or MRI of the foot. After extending past the sustentaculum tali, the flexor hallucis longus (FHL) crosses from lateral to medial over the dorsal surface of the flexor digitorum longus (FDL). This cross-over is termed the master knot of Henry (Figure 70.1). At this cross-over, these two tendons are enclosed together and attached to the vault of the arch of the foot. Just distal to the master knot of Henry, there is a ligamentous attachment between the two tendons. This ligament can be proximal to distally oriented from the FHL to the FDL; it can be distal to proximally oriented from the FHL to the FDL; or it can be bifid with both distal to proximal and proximal to distal oriented ligaments as they extend from the FHL to the FDL.
Importance
Depending on the orientation of the ligament by the master knot of Henry, rupture of the FHL or FDL proximal to the master knot of Henry may not cause loss of toe flexion. When the ligament is oriented distal to proximal from the FHL to the FDL, rupture of the FHL proximal to the master knot of Henry will not cause loss of toe flexion. Conversely, when the ligament is proximal to distal from the FHL to the FDL, rupture of the FDL proximal to the knot will not cause loss of toe flexion. With a bifid ligament, then rupture of either the FHL or FDL proximal to the knot will not cause loss of toe flexion.
- Type
- Chapter
- Information
- Pearls and Pitfalls in Musculoskeletal ImagingVariants and Other Difficult Diagnoses, pp. 151 - 152Publisher: Cambridge University PressPrint publication year: 2013
References
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