PMC9046988_01
(A) Chest computer tomography (CT) at day +75 showing bibasal peripheral ground-glass opacities. (B) Chest CT at day +117 showing persistence of ground-glass opacities with significant reduction.
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f1
A computer tomography scan (CT) was performed as monitoring of his sequelae after acute and severe COVID-19 and revealed ground-glass opacities in both basal lobes of the lungs ( Figure 1A ) . A month later, a new follow-up CT scan was performed ( Figure 1B ), showing a significant improvement of the infiltrates; also, oxygen flow needs were decreasing.
A timeline of the case 1; administered treatments, O2 supply, Rituximab administration, serology, date of vaccination and diagnosis test [Rapid Antigen Test and RT-PCR in nasopharyngeal swabs (NS) and plasma]. RT-PCR, real-time polymerase chain reaction; CT, Cycle threshold values; N, Normal.
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The clinical course, diagnostic tests, and treatments received are summarized in  Figure 2 .
PMC9046988_02
(A) Chest computer tomography (CT) at day +34 showing peripheral ground-glass opacities in both basal lobes of the lungs. (B) Chest CT at day +83 showing a complete disappearance of ground-glass opacities.
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During admission, a chest and abdominal CT scan was performed, showing bilateral interstitial pneumonia and no images suggestive of lymphoma progression ( Figure 3A ). She completed 2 months with prednisone; a new CT scan showed a resolution of bilateral infiltrates ( Figure 3B ). Since then, the patient has been well without recurrence of symptoms.
A timeline of the case 2; administered treatments, O2 supply, Rituximab administration, serology , date of vaccination and diagnosis test ( Rapid Antigen Test and RT-PCR in nasopharyngeal swabs (NS) and plasma). RT-PCR, real-time polymerase chain reaction; CT, Cycle threshold values; N, Normal.
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We summarize the treatments received, clinical manifestations, and diagnostic tests in  Figure 4 .