Which of the following statements is wrong regarding hematoma

Ref. Sabiston Textbook of Surgery. Pg. 436   Hematoma A hematoma is a localized collection of blood outside the blood vessels ,due to either disease or trauma including injury or surgery and may involve blood continuing to seep from broken capillaries . A hematoma is initially liquid in form spread among the tissues including in sacs between tissues where it may coagulate and solidify before blood is reabsorbed in to blood vessels Hematoma need not be operated