Extrapulmonary manifestations of sarcoidosis.
a. Endobronchial cobblestones (a nodular appearance of the tracheal wall mucosa).
b. Diffuse reddish swelling of the earlobe due to skin localization of sarcoidosis granulomas.
c. Sarcoid dactylitis (classical Perthes—Jüngling disease associated with sarcoidosis) causing cystic lesions in the hand bones.
d. Lupus pernio (a chronic hardened red lesion of the skin).
e. Cardiac sarcoidosis with midmyocardial delayed enhancement (arrow) on MRI.
f. Radiography scan of the finger of a patient with sarcoid dactylitis.
g. Skeletal muscle involvement, visualized on fluorodeoxyglucose-PET scan of the lower limbs.
h. Sarcoidal reaction with nodular thickening of the skin at the site of tattooing in a patient with pulmonary sarcoidosis.
i. MRI scan showing a neurosarcoidosis lesion (arrow) to the left and caudally of the optic chiasma.
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