Differential Diagnosis for 1.2 cm Ovoid Hypoechoic Mass Left Chest Wall

• Single Most Likely Diagnosis
  • Lipoma: A common benign tumor composed of fat tissue, which can appear as a hypoechoic mass on ultrasound, especially if it contains a significant amount of fibrous or vascular components.
• Other Likely Diagnoses
  • Cyst: A fluid-filled structure that can appear hypoechoic on ultrasound. It could be a sebaceous cyst, epidermoid cyst, or another type of benign cystic lesion.
  • Hematoma: A collection of blood outside of blood vessels, which could appear hypoechoic, especially if it's not fully resolved.
  • Abscess: A localized collection of pus that can appear as a hypoechoic mass, often with increased blood flow on Doppler ultrasound.
  • Neurofibroma: A benign nerve sheath tumor that can appear as a hypoechoic mass, especially if it involves the peripheral nerves near the chest wall.
• Do Not Miss Diagnoses
  • Metastasis: Although less likely for a small, isolated mass, metastatic disease from a primary malignancy (e.g., breast, lung, or melanoma) could present as a hypoechoic mass in the chest wall.
  • Soft Tissue Sarcoma: A rare but potentially deadly malignancy that could appear as a hypoechoic mass. Early detection is crucial for treatment and prognosis.
• Rare Diagnoses
  • Schwannoma: A rare, benign tumor arising from the nerve sheath, which could appear hypoechoic.
  • Glomus Tumor: A rare, usually benign tumor originating from glomus cells, which could present as a hypoechoic mass, although they are more commonly found in the fingers or toes.
  • Desmoid Tumor: A rare, benign but locally aggressive tumor that could appear as a hypoechoic mass, often associated with a history of trauma or surgery.