Differential Diagnosis for Pain and Swelling in MCP Joint of Left Ring Finger
Single Most Likely Diagnosis
- Trauma or Sprain: The most common cause of pain and swelling in the metacarpophalangeal (MCP) joint, especially in a young adult, is trauma or a sprain. This could be due to a recent injury, such as a fall or a blow to the hand.
Other Likely Diagnoses
- Osteoarthritis: Although less common in a 24-year-old, osteoarthritis can occur, especially if there's a history of trauma or repetitive strain on the joint.
- Rheumatoid Arthritis: An autoimmune disorder that can cause pain, swelling, and stiffness in the MCP joints, often symmetrically.
- Gout: A form of arthritis characterized by sudden, severe attacks of pain, swelling, redness, and tenderness, often occurring at the base of the thumb or other joints.
- Septic Arthritis: A bacterial or fungal infection within the joint, which can cause pain, swelling, and decreased range of motion.
Do Not Miss Diagnoses
- Infectious Arthritis (e.g., Septic Arthritis): Although less likely, missing a diagnosis of septic arthritis can lead to severe consequences, including joint destruction and systemic infection.
- Osteomyelitis: An infection of the bone, which can spread to the joint and cause similar symptoms.
- Ganglion Cyst: A non-cancerous lump that can cause pain and swelling, especially if it becomes inflamed or infected.
Rare Diagnoses
- Psoriatic Arthritis: A type of arthritis that occurs in people with psoriasis, causing pain, swelling, and stiffness in the joints.
- Lupus: A chronic autoimmune disorder that can cause arthritis, as well as other systemic symptoms.
- Sarcoidosis: A condition that can cause inflammation and swelling in various parts of the body, including the joints.
- Hemarthrosis: Bleeding into the joint, which can cause pain and swelling, often due to a bleeding disorder or trauma.