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Table 1: Follow-up, biopsy findings, and definitive diagnosis of 16 pseudotumoral lesions
Case No. Follow-up (Months/Evolution of Lesion) Histologic Examination Final Diagnosis
2 77 m/Focal atrophy No Acute arterial infarct
13 26 m/Lesion regression. Detection of new lesions on follow-up Yes, brain tissue without abnormalities Multiple sclerosis
17 14 m/Lesion regression No Acute disseminated encephalomyelitis
28 30 m/Lesion regression Yes, brain tissue without abnormalities Multiple sclerosis
33 2 m/Lesion regression No Unspecific
34 75 m/Lesion regression. Detection of new lesions on follow-up Yes, inflammatory, gliosis Multiple sclerosis
42 35 m/Focal atrophy Yes, inflammatory, gliosis Unspecific
52 30 m/Lesion regression. Resolution of contrast enhancement Yes, inflammatory, gliosis Unspecific
60 8 m/Lesion regression. Resolution of contrast enhancement No Multiple sclerosis
62 27 m/Lesion regression Yes, inflammatory Unspecific
64 20 m/Lesion regression. Resolution of contrast enhancement No Unspecific
68 8 m/Lesion resolution Yes, inflammatory Unspecific
72 6 m/Lesion regression. Focal atrophy No Acute arterial infarct
78 11 m/Lesion regression No Acute arterial infarct
80 4 m/Lesion regression No Venous infarct
82 8 m/Lesion regression No Multiple sclerosis