The Sakita-Miwa system is highly regarded for its precision. It divides the healing process into six distinct categories: 1. Active Stage (A)
This classification system is widely used in and Infectious Diseases to differentiate between two major types of childhood tuberculosis (TB). It was proposed by Dr. Asril Aminullah and colleagues in Indonesia (sometimes referred to as the "Miwa" classification in local literature derived from Japanese collaborative studies, specifically involving Dr. Miwa).
: The floor is completely covered by regenerating epithelium, and the white coating has disappeared. It appears as a "red scar" due to visible capillaries. S2 (White Scar)
Mature healing; the red scar fades to a stable, pale white scar 💡 Clinical Significance and Application
Clinical Report: Sakita-Miwa Classification for Gastric Ulcers 📋 Executive Summary sakitamiwa classification
is the hallmark of an acute, active ulcer. The ulcer crater is typically deep and completely covered by a thick, shaggy layer of white or yellowish-white fibrin slough—the necrotic tissue at the base of the ulcer. This stage is characterized by significant inflammation of the surrounding area; the mucosa adjacent to the crater is markedly swollen, red, and edematous, which makes the ulcer’s margins look heaped up. Importantly, no visible regenerating epithelium (the new, healthy pink tissue) is seen at the edges.
infection or NSAID use to prevent a return to the "A" stage. Conclusion
For bedside recall, the mnemonic:
The Sakita-Miwa system classifies ulcers based on their appearance during endoscopic examination: 1. Active Stage (A) The Sakita-Miwa system is highly regarded for its precision
: The resolution phase where mucosal continuity is fully restored.
The system divides childhood TB into two primary groups:
Since its introduction in 1970, the Sakita-Miwa classification has become a cornerstone of gastrointestinal endoscopy, providing a practical and objective method for tracking ulcer healing. Its strength lies in its simplicity: by observing a few key characteristics—the presence of edema, the appearance of regenerating epithelium, the extent of white coating, and the nature of scar tissue—an endoscopist can accurately determine the ulcer's stage. This reliable framework is essential for clinical decision-making, from selecting appropriate therapies to designing rigorous clinical trials. Ultimately, the Sakita-Miwa classification ensures that clinicians worldwide can speak a common language when managing one of the most common gastrointestinal conditions, leading to more effective and consistent patient care.
The ulcer begins to shrink and the body starts the repair process. It was proposed by Dr
The ulcer is significantly smaller. The regenerating epithelium covers most of the base, leaving only a tiny central defect. 3. Scarring Stage (S1 & S2)
By providing a clear, chronological roadmap of ulcer development, the Sakita-Miwa classification remains a "gold standard" in endoscopic reporting. It bridges the gap between a single visual observation and a comprehensive treatment plan, ensuring that patients receive care tailored to the specific biological state of their condition. specific treatments typically prescribed for each of these stages?
The Sakita-Miwa classification is not merely a descriptive tool; it has direct and profound implications for patient management. It is a cornerstone of modern gastroenterology for several key reasons:
The following table summarizes the endoscopic appearance at each stage.