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Arch Otolaryngol Head Neck Surg. 2005;131:1030.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Diagnosis: Intramuscular angioma (IMA)

The most widely used classification system for vascular lesions was proposed by Mulliken and Glowacki¹ in 1982. It divides such lesions into 2 broad categories: hemangiomas (vascular tumors) and vascular malformations. Hemangiomas usually are not present at birth. They characteristically undergo proliferation followed by involution, and during the proliferative phase they histologically demonstrate endothelial hyperplasia and increased mitotic activity. Vascular malformations, on the other hand, are always present at birth, although they may not be clinically apparent. They do not undergo proliferation or involution, and histologically they consistently demonstrate normal mitotic activity.

Certain vascular lesions do not readily fit into the Mulliken-Glowacki classification system. Intramuscular angioma (often described as intramuscular hemangioma in the literature) appears to be one such example. Akin to vascular malformations, the IMA has no established proliferative phase and does not regress spontaneously.² The histopathologic features of IMAs, however, can be similar to those of both hemangiomas . . . [Full Text of this Article]

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