Ultrasound Spot Diagnosis of Common Benign Subcutaneous Masses and Pseudomasses: What the Radiologist Needs to Know.

Common benign subcutaneous benign masses and pseudomasses represent a wide spectrum of masses among which lipomas and epidermal cysts account for a vast majority of the lesions encountered in routine practice. Other types of tumors originate from various components of the skin, such as the pilous tract, nerves, veins, arteries, or eccrine glands. In some instances, pseudomasses may be distinguished from tumoral masses using specific signs. When the diagnosis of a subcutaneous lesion lacks specificity for benignity with ultrasound, radiologists should ensure proper management of the patient to rule out the possibility of a rare but possible sarcoma of the subcutaneous layer.