The system is divided into three primary stages, each containing two sub-levels based on the visual appearance of the ulcer during an endoscopy: 1. The Active Stage (A) A1 (Active-1):
The Sakita-Miwa classification is essential for several reasons: sakitamiwa classification
: During this transitional active phase, inflammation begins to calm. The surrounding tissue edema shrinks, rendering the "lip-like sign" barely visible or absent. The base remains covered in mucus/slough, but the boundaries are sharper. 2. The Healing Stage (Stage H) The system is divided into three primary stages,
The strength of the lies in its predictive power. A 2021 multicenter retrospective study involving 1,200 patients found that: 200 patients found that: