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68Ga-DOTATOC Pictorial Essay of Various Recurrent Meningiomas Rejected for Treatment With 177Lu-DOTATATE: Is There a Place for Another Theranostic Examination?
Clinical Nuclear Medicine 2024 May 2
We report the cases of 4 patients treated for recurrent meningiomas of various grades. Pretreatment 68Ga-DOTATOC PET/CT was performed prior to screening for vectorized internal radiotherapy with 177Lu-DOTATATE or prior external radiotherapy to aid contouring. None of these patients had sufficient uptake to be eligible for 177Lu-DOTATATE or reliable contouring. Most recurrences were grades II and III, suggesting a loss of physiological somatostatin receptor overexpression in these tumors. Therefore, the benefit of treatment with 177Lu-DOTATATE in the current indication is questionable. In the absence of a validated systemic treatment, and considering a few case reports, treatment with 177Lu-PSMA could be investigated as an additional vectorized internal radiotherapy option.
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