The Sakitamiwa classification groups congenital cutaneous and soft-tissue anomalies into four actionable categories—vascular malformations, vascular tumors, hamartomas/overgrowth syndromes, and developmental epidermal/dermal defects—emphasizing morphology, natural history, diagnostics, and tailored management to guide clinicians toward appropriate care.
The ulcer has disappeared, replaced by a red scar consisting of young, delicate tissue. S2 (Scarring 2/White Scar):
It allows physicians to measure the ulcer reduction rate, such as comparing the effectiveness of different Proton Pump Inhibitors (PPIs) or potassium-competitive acid blockers (P-CABs) like vonoprazan.
In the field of gastroenterology, accurately assessing the stages of peptic ulcer healing is crucial for determining treatment efficacy and patient prognosis. While various systems exist to describe ulcers, the —often referred to simply as the Sakita-Miwa system—stands as a cornerstone in endoscopic diagnosis, particularly in East Asian clinical practice. sakitamiwa classification
The coating becomes thinner, and the ulcer size significantly decreases. Regenerative epithelium appears, forming a white or reddish border around the ulcer margin.
The healing phase marks the transition from tissue destruction to active physiological repair. During this cycle, the human body actively reduces the surface area of the injury through epithelial cell migration.
A validated point-of-care score – the – combines age > 55 years, platelet count < 70,000/μL, and a positive non-structural protein 1 (NS1) antigen result. SSI ≥ 4 predicts Stage III with 89% sensitivity. In the field of gastroenterology, accurately assessing the
Understanding this system is essential for evaluating the effectiveness of ulcer treatments (like proton pump inhibitors or potassium-competitive acid blockers) and determining the success of endoscopic therapies. 1. The Stages of Sakita-Miwa Classification
This final phase signifies the completion of the healing process. The ulcer is now closed, and the newly formed tissue is undergoing a maturation process.
To facilitate clinical trials and precise quantitative studies, the Sakita-Miwa stages can be translated into numerical scores, allowing clinicians to track healing statistically. Description Healing Score A1cap A sub 1 Active Stage 1 5 (Most Active) A2cap A sub 2 Active Stage 2 H1cap H sub 1 Healing Stage 1 H2cap H sub 2 Healing Stage 2 S1cap S sub 1 S2cap S sub 2 White Scar 0 (Healed) Regenerative epithelium appears, forming a white or reddish
The red scar fades and becomes white over time (white scar), indicating long-term, mature scarring. Clinical Applications and Importance
This stage represents the nadir of mucosal integrity. The body is actively dealing with local tissue destruction.