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Table 1 Grading scheme for invasive adenocarcinomas of pulmonary nodules

From: Multi-classification model incorporating radiomics and clinic-radiological features for predicting invasiveness and differentiation of pulmonary adenocarcinoma nodules

Grade

Differentiation

Patterns

1

Well differentiated

Lepidic predominant with no or less than 20% of high-grade patterns

2

Moderately differentiated

Acinar or papillary predominant with no or less than 20% of high-grade patterns

3

Poorly differentiated

Any tumor with 20% or more of high-grade patterns

  1. High-grade patterns include solid, micropapillary, and complex glandular patterns