Sakitamiwa Classification [extra Quality] Jun 2026

Slough becomes thinner; edema at the margin begins to decrease; the ulcer base is clearly demarcated . H1

It is important not to confuse the Sakita-Miwa classification with another common endoscopic scoring system for ulcers: the .

Use as a primary or secondary endpoint in clinical trials for new gastroprotective drugs.

The classification was originally established in the early 1970s. While the original primary text is often cited as a textbook or early Japanese journal entry, you can find the classification detailed and applied in these authoritative research papers: sakitamiwa classification

By analyzing the macroscopic characteristics of a gastric or duodenal ulcer—such as the presence of a white slough coating, mucosal edema, margins, and regenerative epithelium—clinicians can objectively determine whether an ulcer is expanding, healing, or fully scarred. Today, it serves as an indispensable tool in both routine clinical practice and global pharmacological trials to measure the efficacy of acid-suppressing medications. The Three Main Stages and Six Substages

If you were looking for a real medical term – such as the Sakati–Nyhan classification for congenital malformations (arthrogryposis, ectodermal dysplasia) or the Kawasaki disease staging – please clarify. Otherwise, this article stands as a complete, structured guide to the hypothetical Sakitamiwa Classification system.

The Sakita-Miwa system is highly regarded for its precision. It divides the healing process into six distinct categories: 1. Active Stage (A) Slough becomes thinner; edema at the margin begins

The is a standardized endoscopic grading system used primarily by gastroenterologists to assess the life cycle and healing stages of peptic ulcers (both gastric and duodenal). Developed by Japanese researchers Sakita and Miwa, it divides the progression of an ulcer into three main stages— Active (A) , Healing (H) , and Scarring (S) —each further subdivided into two substages.

The staging is based on three key visual characteristics observable during an endoscopy: the thickness of the "white coating" (slough or exudate) covering the ulcer, the extent to which new pink (regenerating) epithelium has grown over the ulcer base, and the color of the resulting scar.

), it allows for a more personalized treatment plan, ensuring that high-risk ulcers ( A1cap A sub 1 ) are monitored closely until they become inactive scars ( S2cap S sub 2 The classification was originally established in the early

The classification of disease is the fundamental backbone of medical practice. In biomedicine, classification systems like the ICD-11 categorize diseases based on distinct biological markers. However, in many developing nations and indigenous communities, "Folk Illnesses" persist. These are syndromes recognized only within a specific culture, often lacking direct equivalents in Western nosology.

Understanding the stages of the Sakita-Miwa system is critical for evaluating drug efficacy in clinical trials, assessing bleeding risks, and tracking patient recovery over time. The Structure of the Sakita-Miwa Classification

: The surrounding tissue edema begins to subside, clearing up the boundaries of the wound. The ulcer crater remains deep, but a delicate, thin red halo (marginal zone) begins to encircle the white slough, signaling that the body is preparing to transition into a healing phase. Surrounding mucosal folds begin converging uniformly toward the ulcer edge. 2. The Healing Stage (H)

Why does the Sakitamiwa classification persist?

Regenerative epithelium (new tissue) appears around the margins of the ulcer, making them look smoother or less distinct than in the active stage. The white coat begins to disappear.