Differential Diagnosis for Fluid-Filled Growth on Finger
Single Most Likely Diagnosis
- Ganglion cyst: This is the most common type of lump found on the wrist or finger, often filled with a jelly-like fluid. It is usually benign and can be caused by wear and tear on the joint.
Other Likely Diagnoses
- Mucous cyst: A small, fluid-filled lump that appears on the finger, typically near the nail. It is often associated with osteoarthritis and can be caused by a buildup of fluid in the joint.
- Epidermoid cyst: A benign cyst filled with a thick, cheesy material that can appear on the finger. It is usually caused by a blockage of the oil glands in the skin.
- Sebaceous cyst: Similar to an epidermoid cyst, but filled with a thick, oily material. It is also usually benign and caused by a blockage of the oil glands.
Do Not Miss Diagnoses
- Squamous cell carcinoma: A type of skin cancer that can appear as a firm, growing lump on the finger. Although rare, it is important to rule out this diagnosis due to its potential severity.
- Malignant melanoma: A type of skin cancer that can appear as a new or changing mole on the finger. It is crucial to consider this diagnosis due to its high mortality rate if left untreated.
- Infectious abscess: A collection of pus that can appear as a painful, fluid-filled lump on the finger. It is essential to consider this diagnosis, as it requires prompt antibiotic treatment or drainage.
Rare Diagnoses
- Glomus tumor: A rare, benign tumor that appears as a small, blue-colored lump under the fingernail. It is usually painful and sensitive to temperature changes.
- Digital myxoid cyst: A rare, benign cyst filled with a thick, jelly-like material that appears on the finger. It is often associated with osteoarthritis and can be caused by a buildup of fluid in the joint.
- Synovial sarcoma: A rare type of cancer that can appear as a lump on the finger, often near the joint. It is essential to consider this diagnosis due to its potential severity, although it is extremely rare.