title: Typical and atypical manifestations of intrathoracic sarcoidosis.
abstract: Sarcoidosis is a systemic disorder of unknown cause that is characterized by the presence of noncaseating granulomas. The radiological findings associated with sarcoidosis have been well described. The findings include symmetric, bilateral hilar and paratracheal lymphadenopathy, with or without concomitant parenchymal abnormalities (multiple small nodules in a peribronchovascular distribution along with irregular thickening of the interstitium). However, in 25% to 30% of cases, the radiological findings are atypical and unfamiliar to most radiologists, which cause difficulty for making a correct diagnosis. Many atypical forms of intrathoracic sarcoidosis have been described sporadically. We have collected cases with unusual radiological findings associated with pulmonary sarcoidosis (unilateral or asymmetric lymphadenopathy, necrosis or cavitation, large opacity, ground glass opacity, an airway abnormality and pleural involvement) and describe the typical forms of the disorder as well. The understanding of a wide range of the radiological manifestations of sarcoidosis will be very helpful for making a proper diagnosis.
authors.affiliation: Department of Radiology, St. Vincent's Hospital, The Catholic University of Korea, Kyunggi-do 442-723, Korea.
authors.forename: Hyun Jin
authors.initials: HJ
authors.lastname: Park
authors.forename: Jung Im
authors.initials: JI
authors.lastname: Jung
authors.forename: Myung Hee
authors.initials: MH
authors.lastname: Chung
authors.forename: Sun Wha
authors.initials: SW
authors.lastname: Song
authors.forename: Hyo Lim
authors.initials: HL
authors.lastname: Kim
authors.forename: Jun Hyun
authors.initials: JH
authors.lastname: Baik
authors.forename: Dae Hee
authors.initials: DH
authors.lastname: Han
authors.forename: Ki Jun
authors.initials: KJ
authors.lastname: Kim
authors.forename: Kyo-Young
authors.initials: KY
authors.lastname: Lee
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008198:Lymph Nodes / Q000473:pathology; D013902:Radiography, Thoracic; D017565:Sarcoidosis, Pulmonary / Q000000981:diagnostic imaging* / Q000473:pathology; D013896:Thoracic Diseases / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed