Long-term survival in patients with primary malignant brain tumors after postoperative home hydrogen inhalation: Three case reports

Figure 7 Cranial magnetic resonance imaging performed in November 2022 showed patchy low signals on T1-weighted imaging and mixed signals on fluid-attenuated inversion recovery sequence in the surgical area, suggesting possible postoperative changes or tumor recurrence. A: Follow up cranial magnetic resonance imaging (MRI)-axial section in November 2022; B: Follow up cranial MRI-sagittal section in November 2022; C: Follow up cranial MRI-axial section in December 2023 revealing no obvious enhancing lesions; D: Follow up cranial MRI-sagittal section in December 2023 revealing no obvious enhancing lesions; E: Follow up cranial MRI-axial section in September 2025 revealing no obvious enhancing lesions; F: Follow up cranial MRI-sagittal section in September 2025 revealing no obvious enhancing lesions (provided by the West Campus of Huashan Hospital, affiliated to Fudan University, Shanghai, China).