Mid-Back (Thoracic)
T4 Syndrome
T4 증후군
Upper thoracic (T2-T7) dysfunction causing upper limb paresthesia
- How common
- Relatively uncommon
- Typical age
- Women, ages 30–50
What is it?
Upper thoracic facet dysfunction irritates sympathetic chain and dermatomes, causing upper limb symptoms.
Commonly affected: T2-T7 facets, sympathetic chain
How it develops
- Upper Thoracic StrainPoor posture stresses T2-T7 facets
- Facet DysfunctionHypomobility with protective spasm
- Sympathetic IrritationIrritation of thoracic sympathetic chain
- Upper Limb SymptomsGlove-like paresthesia/pain
Symptoms
- Bilateral arm paresthesiaVague glove-like bilateral paresthesia
- Upper back painAching pain between shoulder blades
- Posture-dependentWorse with prolonged sitting
- Associated headacheOccipital headache may accompany
How it is examined
- Upper thoracic tendernessT2-T7 spinous process and paraspinal tenderness
- Segmental facet testReduced segmental mobility upper thoracic
- Normal neurologicNo objective motor/reflex/sensory deficit
- Adson/Roos negativeRules out thoracic outlet syndrome
Imaging
Usually normal or mild degenerative changes.
- Often normal
- Mild facet changes
- Postural alignment abnormality
MRI to exclude structural causes (disc, tumor).
- No specific findings
- Excludes structural pathology
Non-surgical care
- Manual therapyUpper thoracic mobilization/manipulation (HVLA)
- Posture correctionMonitor height and seating ergonomics
- Stretching/strengtheningThoracic extension, scapular stabilization
- Trigger point therapyUpper back myofascial release
Conservative options are generally tried first. Medications listed here can have side effects — discuss them with your prescriber.
When surgery is considered
No surgical indication
Procedures that may be discussed
- Conservative care only
Outlook
Most resolve in weeks with manual therapy and posture correction.