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A lump on the finger knuckle joint that appears suddenly can cause concern. It can happen for many reasons, ranging from an inflammatory disease to an infection or, more rarely, a tumor.

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Source: Medical News Today

  • Yale University
  • The University of Pennsylvania
  • Cornell University
  • The University of Rochester
  • American Academy of Orthopaedic Surgeons
  • American Society for Surgery of the Hand
  • AO Trauma
  • The Student National Medical Associatio
  • The J. Robert Gladden Orthopaedic Society
  • American Board of Orthopaedic Surgery