DIPJ

DDx

OA

Psoriasis

CREST (scleroderma)

RA (rare form)

Other seronegative arthropathies

Hyperparathyroidism

Reactive arthropathy

Gout

Conditions

1.  PIPJ Synovitis

- synovectomy via dorsomedial approach

2.  Flexor tenosynovitis

- may cause trigger finger

- trial HCLA

- remove synovits but don't release A1 pulley

- will worsen ulna drift

3.  DIPJ

- rarely affects

Epidemiology

Male & Females > 60 years

- X-ray evidence of OA

Symptomatic 

- 25% females

- 15% males

Affected joints

Base thumb

PIPJ / Bouchard's nodes

DIPJ / Heberden's nodes