Intramuscular hemangiomas of the masseter and sternomastoid muscles.

Two cases of hemangiomas involving the masseter and sternomastoid muscle are added to the English literature. Our limited experience with these cases confirms that preoperative diagnosis and planning can be difficult. Recurrences of tumors are related to incomplete excisions although their further treatments in the final analysis depend on the adjacent structures affected. Careful individualization of treatment is therefore a necessity. Embolization is not sufficient therapy if not followed by surgery.