Average stenosis rate in each arterial group for six patients with pulmonary tumor thrombotic microangiopathy. No significant differences were found for average stenosis rate between the under 100-μm group and the 100 to 300-μm group in all cases. On the other hand, significant differences were found for average stenosis rate between the under 100-μm group or 100 to 300-μm group and the 300-μm group in four of the six cases (Case 1, 2, 3, and 6). Statistical significance was tested using the one-way analysis of variance (ANOVA) and the Bonferroni post hoc test. Values are expressed as mean ± standard deviation. Differences were considered significant at P < 0.05 (*: P < 0.05, ns: P > 0.05).