Signs and Symptoms - Hematomas can be visible under the skin or felt as masses or lumps - Lumps may be caused by blood being limited to a specific space - Hematomas may dissolve or continue to grow - Broken down blood cells and hemoglobin can move in the connective tissue - Hematomas on articulations can reduce mobility and resemble fractures

Classification - Hematomas can be classified based on their location and cause - Types of hematomas include subdermal, intramuscular, and skull/brain hematomas - Subgaleal hematoma occurs between the galea aponeurosis and periosteum - Cephalohematoma is commonly caused by vacuum or vertex delivery - Hemangioma is a misdiagnosis of a hematoma in the vertebra

Types - Subdermal hematoma occurs under the skin - Intramuscular hematoma develops inside muscle tissue - Skull/brain hematomas include subgaleal and cephalohematoma - Hematoma can also refer to a mass or tumor - Hematomas can occur in various parts of the body, such as the ankle or buttocks

See also - Metanephric dysplastic hematoma of the sacral region - Welts can sometimes resemble hematomas - Further information on hematoma types, causes, and treatments - Hematoma information from the University of Utah library - Robbins Basic Pathology textbook reference

References - Hematoma classification according to ICD-10 and ICD-9-CM codes - Definition of hematoma from the Online Etymology Dictionary - Reference to a book on pathology discussing hematoma - Additional reference from Emedicinehealth.com on hematoma information - Gross image of a hematoma on a toenail from the University of Utah library