© International Society for the Study of Vascular Anomalies (ISSVA).
© William A. Lee. Adaptation, commentary, and original interpretive content. All rights reserved.
Adaptation of the ISSVA Vascular Anomalies Classification (2018–2026) used with permission requested; original content © ISSVA. This presentation includes a patient‑centered adaptation of ISSVA’s lead classification document. A complete permissions package submitted to ISSVA for review.
Portions of the ISSVA Vascular Anomalies Classification (2018–2026) are referenced and reinterpreted here by William A. Lee for non‑commercial, educational, and patient‑advocacy purposes. The original classification is the copyrighted work of the International Society for the Study of Vascular Anomalies (ISSVA).
Care 4 - Rare 