History of trauma to digit and painful PIP.
Forced flexion of actively extended finger
Direct blow to PIP
Jamming
Laceration distal to PIP can injure central tendon
On exam, will see hyperflexion of PIP with hyperextension of DIP and MP joints.
Boutonniere deformity
Rheumatoid arthritis
Nursemaid's elbow
Volar PIP dislocation
Swan neck deformity
Flexion contracture of PIP joint
Drummer's wrist
Distal finger