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Vascular Tumors and Tumor-Like Lesions 

Vascular Tumors and Tumor-Like Lesions
Vascular Tumors and Tumor-Like Lesions

Odile Enjolras

, John B. Mulliken

, and Harry P. W. Kozakewich

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date: 10 April 2020

Pathologists often use “hemangioma” in a generic sense and apply the term to many vascular tumors, tumor-like lesions and vascular malformations. In vascular anomalies centers, specialists use ”hemangioma” to mean infantile hemangioma. For precision, “hemangioma” requires a qualifier so as to designate other vasoproliferative lesions. The traditional histologic terms, such “arteriovenous” and “venous” hemangiomas are antiquated; these lesions are currently categorized as vascular malformations. This chapter reviews the histopathology of common and uncommon vascular tumors and includes newly delineated entities, such as PTEN hamartoma of soft tissue and kaposiform lymphangiomatosis. Clinical and pathologic mimickers of vascular tumors are also included. Vascular tumors involve all organ systems and pathologists, general and specialized, are confronted with these lesions.

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