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The morphological abnormalities of spleen in 3 groups. Compared to the control group (A, ×100 and D, ×200), the degree of atrophy in the spleen was mild to moderate in the pulsed low-dose rate radiotherapy (PLDR) group (B, ×100 and E, ×200), but severe in the conventional radiotherapy (RT) group (C, ×100 and F, ×200).
