Fig. 2.

[18F]FDG PET/CT in a patient with a known history of psoriatic arthritis and erythema nodosum, still under treatment with corticosteroids. He complained of the onset of indolent lateral-cervical lymphadenopathies and bilateral salivary glands swelling after COVID-19 vaccination. PET/CT shows a pattern suspicious for sarcoidosis, with symmetric lymphadenopathies with high [18F]FDG uptake in the mediastinum, lateral-cervical and pulmonary hilum bilaterally, and in sub-diaphragmatic stations. Mediastinal lymphadenopathy biopsy confirmed the diagnosis of non-necrotizing granulomatous sarcoidosis