Calcific Tendinitis

Upper Limb

Overview

Calcific tendinitis is an inflammatory condition characterized by calcium hydroxyapatite deposition within tendons, most commonly affecting the rotator cuff of the shoulder. The condition presents with acute or chronic pain and functional limitation, often self-limiting but capable of causing significant disability during acute phases.

Pathophysiology

Calcific tendinitis involves deposition of calcium hydroxyapatite crystals within tendon tissue, typically progressing through stages: formative (asymptomatic crystal deposition), calcific (mature deposits with possible inflammation and resorption), and post-calcific (resorption and healing). The exact etiology remains unclear but involves intrinsic tendon factors, vascular changes, and cellular responses to crystal formation. Acute inflammation occurs when the body attempts to resorb deposits, triggering an intense local inflammatory response that may cause sudden severe pain.

Patient Education

Calcific tendinitis often resolves spontaneously over weeks to months as your body naturally reabsorbs the calcium deposits; maintaining movement within pain tolerance and avoiding immobilization accelerates recovery.

Typical Presentation

Site

Supraspinatus tendon most common; also infraspinatus, subscapularis, and less commonly biceps tendon. Shoulder anterolateral region typically over the insertion

Quality

Sharp, acute, sometimes burning or throbbing pain; may be described as catching or stabbing

Intensity

Highly variable: ranges from mild asymptomatic findings on imaging to severe incapacitating pain; acute phases can be 7-10/10

Aggravating

Overhead activities, reaching across body, sleeping on affected side, sudden movements, activities requiring shoulder elevation and external rotation

Relieving

Rest, ice application, anti-inflammatory medications, heat after acute phase, pendulum exercises, arm support

Associated

Night pain, significant functional limitation in acute phase, local swelling and warmth, loss of active range of motion (especially abduction and external rotation), referred pain to lateral arm, muscle guarding and protective spasm

Orthopaedic Tests

Neer Impingement Sign

Procedure

Patient seated or standing; examiner passively flexes the shoulder to 90° while internally rotating the humerus, moving the arm across the body and upward.

Positive Finding

Reproduction of pain in the anterolateral shoulder, suggesting subacromial impingement and supraspinatus involvement.

Sensitivity / Specificity

72% / 60%

Hegedus et al., 2008, BJSM

Interpretation

Positive result suggests mechanical impingement of rotator cuff tendons, common in calcific tendinitis affecting the supraspinatus. Low specificity; must be combined with other tests.

Hawkins-Kennedy Test

Procedure

Patient seated or standing with shoulder flexed to 90° and elbow flexed to 90°; examiner passively internally rotates the humerus.

Positive Finding

Pain reproduction in the anterolateral shoulder; more specific for subacromial impingement than Neer sign.

Sensitivity / Specificity

73% / 75%

Hegedus et al., 2008, BJSM

Interpretation

Higher specificity for subacromial impingement and rotator cuff pathology. Positive finding supports calcific tendinitis diagnosis, particularly when deposits are in the supraspinatus.

Painful Arc Test

Procedure

Patient actively abducts the shoulder from 0° to 180°; examiner observes for a range of angles where pain is reported.

Positive Finding

Pain reproduction between 60° and 120° of abduction (the 'painful arc'), typically resolving beyond 120°.

Sensitivity / Specificity

54% / 82%

Hegedus et al., 2008, BJSM

Interpretation

High specificity for subacromial pathology. Calcific deposits in the supraspinatus typically produce a painful arc; positive finding strengthens diagnosis when combined with imaging.

Infraspinatus Strength Test (External Rotation at 0° Abduction)

Procedure

Patient supine or seated with shoulder abducted 0° and elbow flexed 90°; examiner applies internal rotation resistance while palpating the infraspinatus.

Positive Finding

Weakness or pain with external rotation resistance; may be accompanied by pain on palpation over the infraspinatus tendon.

Sensitivity / Specificity

See current literature / See current literature

Interpretation

Identifies infraspinatus involvement or inhibition due to pain from calcific deposits. Useful when calcification affects the infraspinatus or posterior rotator cuff.

Palpation of the Rotator Cuff

Procedure

With patient seated and arm internally rotated (hand on opposite shoulder), examiner palpates the rotator cuff tendons, particularly supraspinatus and infraspinatus at the musculotendinous junction.

Positive Finding

Tenderness, localized pain, or palpable crepitus over the affected tendon; may elicit referred pain with direct pressure.

Sensitivity / Specificity

See current literature / See current literature

Interpretation

Direct palpation over calcific deposits often reproduces pain. Useful for identifying the specific location of calcification; particularly valuable during acute inflammatory phases of calcific tendinitis.

Calcium Provocation Test (Resisted Horizontal Adduction)

Procedure

Patient supine or seated with shoulder flexed 90° and internally rotated; examiner applies resistance to horizontal adduction while palpating the supraspinatus.

Positive Finding

Reproduction of pain or tenderness along the supraspinatus tendon during active or resisted movement.

Sensitivity / Specificity

See current literature / See current literature

Interpretation

Attempts to provoke symptoms from calcific deposits in the supraspinatus by creating shear stress on the tendon. Useful adjunct to impingement testing when calcification is suspected.

⚠ Red Flags

  • •Sudden severe pain with inability to move arm (possible rupture)
  • •Signs of infection: fever, spreading erythema, warmth, increased swelling
  • •Neurological signs: numbness, tingling, weakness suggesting nerve compromise
  • •Systemic symptoms: unexplained weight loss, fatigue, fever (possible autoimmune or malignancy)
  • •Severe unrelenting pain unresponsive to conservative treatment lasting >6 weeks
  • •Symptoms following trauma with immediate functional loss

⚡ Yellow Flags

  • •High pain catastrophization or fear-avoidance behaviors limiting movement
  • •Beliefs that calcium deposits are permanent or require surgery
  • •Poor coping strategies or significant anxiety about condition
  • •Work or activity-related fear with potential for kinesiophobia
  • •Expectations for rapid resolution leading to non-compliance with staged recovery
  • •Secondary gain factors or compensation claims

Osteopathic Techniques

Region

Shoulder girdle and rotator cuff

Technique

Soft Tissue

Rationale

Gentle soft tissue mobilization to the supraspinatus, infraspinatus, and surrounding musculature reduces protective muscle guarding, improves local circulation to promote resorption, and decreases secondary myofascial restrictions without aggravating inflamed tendon tissue

Region

Glenohumeral joint

Technique

Articulation

Rationale

Gentle arthrokinematic mobilizations in neutral and pain-free ranges maintain joint mobility and synovial nutrition without forcing movement through inflamed tissue, preventing secondary stiffness and promoting proprioceptive recovery

Region

Cervical and thoracic spine

Technique

MET

Rationale

Muscle energy techniques to cervical and thoracic segments address postural dysfunction and muscle imbalances that offload the shoulder girdle, improve thoracic mobility to enhance shoulder mechanics, and reduce referred pain patterns

Region

Scapulothoracic articulation

Technique

Soft Tissue

Rationale

Release of serratus anterior, rhomboid, and trapezius restrictions restores scapular stability and positioning, reducing abnormal glenohumeral mechanics and secondary stress on calcified tendon during arm elevation

Region

Shoulder complex and upper limb

Technique

Lymphatic

Rationale

Gentle lymphatic drainage techniques improve local fluid dynamics, reduce inflammatory swelling and pain, and enhance resorption of calcium deposits by optimizing tissue environment and reducing local inflammatory mediator concentration

Region

Thoracic inlet and shoulder girdle

Technique

Functional

Rationale

Functional release of the shoulder girdle complex in pain-free positions restores normal movement patterns, reduces protective guarding, and facilitates proper neuromotor recruitment without tissue irritation

Add-On Approaches

Chinese Medicine

Acupuncture to local points (LI15 Jianyu, TE14 Jianliao) and distal points (LI10, LI4) may reduce inflammation and pain; moxibustion for post-acute phase to promote circulation and resorption; herbal formulas addressing blood stasis and inflammation

Chiropractic

Shoulder joint mobilization and manipulation to restore arthrokinematics; cervical and thoracic spine manipulation to optimize postural mechanics; soft tissue therapy to supporting musculature

Physiotherapy

Progressive range of motion exercises beginning with pendulum exercises; scapular stabilization progressions; rotator cuff strengthening in functional patterns; postural correction and ergonomic modification; manual therapy adjunctive to exercise

Remedial Massage

Soft tissue massage to trapezius, rhomboid, serratus anterior, and pectoralis musculature; trigger point therapy to reduce secondary myofascial restrictions; gentle cross-friction techniques may support resorption phase

Rehabilitation Exercises

Pendulum Circles

Range of MotionBeginner

Active-Assisted Shoulder Flexion (using opposite arm or wall slide)

Range of MotionBeginner

Sleeper Stretch (shoulder internal rotation)

StretchingBeginner

Cross-Body Shoulder Stretch (horizontal adduction)

StretchingBeginner

Isometric Shoulder External Rotation (arm at side, neutral elbow)

StrengtheningBeginner

Side-Lying External Rotation with light resistance band

StrengtheningIntermediate

Prone Horizontal Abduction (T-position)

StrengtheningIntermediate

Scapular Retraction (shoulder blade squeeze, standing or seated)

PosturalBeginner

Wall Slides (shoulder flexion-abduction pattern with scapular control)

PosturalIntermediate

Resistance Band Pull-Apart (external rotation emphasis)

StrengtheningIntermediate

Quadruped Shoulder Reach (gentle dynamic mobilization)

Range of MotionIntermediate

Standing Resistance Band Diagonal Patterns (functional reaching)

StrengtheningAdvanced

Referral Criteria

  • •Acute severe pain with complete loss of function not improving after 48 hours of conservative care
  • •Suspected tendon rupture (sudden weakness, complete loss of ability to initiate motion, positive drop-arm test)
  • •Fever, spreading erythema, or systemic signs suggesting infection
  • •Neurological deficits: weakness, sensory changes, or dermatomal patterns
  • •Failure to improve after 6-8 weeks of appropriate conservative treatment
  • •Chronic calcifications causing persistent limitation affecting quality of life despite compliance with rehabilitation
  • •Imaging evidence of large, symptomatic deposits in patients with functional goals requiring intervention
  • •Suspected autoimmune or systemic disease contributing to calcification
  • •Signs of concurrent impingement or rotator cuff tear
  • •Psychological distress or catastrophic pain beliefs affecting recovery trajectory