Differential Diagnosis for "Hard not painful"

• Single most likely diagnosis
  • Lipoma: A benign tumor composed of fat tissue, often presenting as a hard, painless mass.
• Other Likely diagnoses
  • Fibroma: A benign tumor of fibrous or connective tissue, which can feel hard and is usually not painful.
  • Hematoma: A collection of blood outside of blood vessels, which can present as a hard, painless mass if it is chronic and has started to calcify or organize.
  • Cyst: Certain types of cysts, like a dermoid cyst, can feel hard and are typically not painful.
• Do Not Miss (ddxs that may not be likely, but would be deadly if missed.)
  • Malignant tumor: Although less likely, a hard, painless mass could be a sign of a malignant tumor, such as a sarcoma. Early detection is crucial for treatment and prognosis.
  • Metastasis: A metastatic lesion from a primary cancer elsewhere in the body could present as a hard, painless mass.
• Rare diagnoses
  • Pilar cyst: A type of cyst that originates from the hair follicle and can feel hard, though they are more commonly found on the scalp.
  • Calcification: Abnormal calcification in soft tissues can present as hard, painless masses, though this would be less common and often associated with other symptoms or conditions.
  • Osteoma cutis: A rare condition where bone forms in the skin, which could present as a hard, painless nodule.