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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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A lesion composed of microscopic vessels is called as:
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The correct answer is  The term hemangioma traditionally has been used to describe a variety of developmental vascular anomalies. Currently, hemangiomas are considered to be benign tumors of infancy that display a rapid growth phase with endothelial cell proliferation, followed by gradual involution.
 
Ref: Nevilles oral and maxillofacial pathology 4th edition page 504