Journal of the Korean Association of Oral and Maxillofacial Surgeons : eISSN 2234-5930 / pISSN 2234-7550

Fig. 2.

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Fig. 2. Pattern of invasion (POI) classified into 5 categories. Type 1 shows a broad pushing front. Type 2 shows a finger-like front (A, ×20 magnification, red arrows). Type 3 shows a larger cell group (>15-cell island, red arrow) (B, ×10 magnification). Type 4 shows smaller cell groups (≤15-cell island, red arrows), strands, or even single cells (within 1 mm from main tumor) (C, ×20 magnification). Type 5 shows satellite patterns that detached the island (red arrow) from the main tumor or island by >1 mm (D, ×10 magnification), large cell island >1 mm away from the main tumor.
J Korean Assoc Oral Maxillofac Surg 2022;48:249~258