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Any symptoms? Pain? Any other pictures? When did you notice it? Is it getting bigger? Are you aware of anything which might have triggered it? Any medical problems? Any surgeries Any medications including over-the-counter pills and herbs? Any family medical history?
Can you attach T1-weighted images with gadolinium (contrast) of 233.JPG (without gadalinium)?
Did you have any iv infusion during the MRI?
It is difficult to say what it is without gadolinium. If it is enhanced, it could be meningioma. You should have MRI wth gadolinium infusion.
There are many possibilities (lymphoma, plasmacytoma, metastatic carcinoma, melanocytic neoplasms, solitary fibrous tumor, gliosarcoma, inflammatory lesions such as sarcoidosis and granulomatosis with polyangiitis, and infections such as tuberculosis). Only the headaches are related to meningioma. Hypothyroidism causes weakness and memory problem. Multiple sclerosis could cause your symptoms. But you need enhanced MRI to detect it.