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  Introduction to Sarcoidosis Sarcoidosis is a multisystem granulomatous inflammatory disease characterized by the formation of non-caseating granulomas in affected organs.  Sarcoidosis most commonly involves the lungs and intrathoracic lymph nodes but may affect virtually any organ system, including the heart, skin, eyes, nervous system, and liver.  Because of its protean manifestations and unpredictable course, sarcoidosis remains one of the most fascinating and challenging inflammatory disorders in clinical medicine. Sarcoidosis is frequently searched under terms such as sarcoidosis diagnosis, sarcoidosis imaging, cardiac sarcoidosis, gallium scan sarcoidosis, and sarcoidosis treatment guidelines, making optimized discussion of these keywords essential for educational and academic dissemination. Figure Review Figure 1. Gallium-67 Nuclear Medicine Scan Symmetrical increased Gallium-67 uptake in bilateral parotid and lacrimal glands (“Panda sign”) and right paratracheal ...