title: Tumoral pseudogout of the proximal interphalangeal joint of a finger: a case report and literature review.
abstract: Tumoral pseudogout is a rare clinical form of calcium pyrophosphate dihydrate crystal deposition disease. Tumoral pseudogout can mimic other diseases such as chondroid tumor, tophaceous gout, or tumoral calcinosis. Its radiological features have been presented in some case reports, but no specific radiographic features have been identified. Here, we report an unusual case of recurrent tumoral pseudogout involving the proximal interphalangeal joint of the right long finger. This case presents with progressive radiological findings of the disease with an enlarging and recurrent calcified mass and secondary bony erosion and remodeling, along with a radiological-pathological correlation. We also review previously reported imaging findings of this disease entity, differential points in comparison to other diseases, and some key points for making the correct diagnosis.
authors.affiliation: Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea.
authors.forename: Hyo Jung
authors.initials: HJ
authors.lastname: Park
authors.affiliation: Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea. chung@amc.seoul.kr.
authors.forename: Hye Won
authors.initials: HW
authors.lastname: Chung
authors.affiliation: Department of Radiology and Research Institute of Radiology, University of Ulsan College of Medicine, Asan Medical Center, 88, Olympic-ro 43-gil, Songpa-gu, Seoul, 05505, South Korea.
authors.forename: Tack Sun
authors.initials: TS
authors.lastname: Oh
authors.affiliation: Departments of Orthopedic Surgery, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea.
authors.forename: Jong-Seok
authors.initials: JS
authors.lastname: Lee
authors.affiliation: Department of Pathology, University of Ulsan College of Medicine, Asan Medical Center, Seoul, South Korea.
authors.forename: Joon Seon
authors.initials: JS
authors.lastname: Song
authors.affiliation: Department of Pathology, Kyung Hee University Hospital, Gangdong, Kyung Hee University School of Medicine, Gangdong, South Korea.
authors.forename: Yong-Koo
authors.initials: YK
authors.lastname: Park
mesh_terms: D000368:Aged; D002114:Calcinosis / Q000000981:diagnostic imaging; D002805:Chondrocalcinosis / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005385:Fingers / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007596:Joints / Q000000981:diagnostic imaging* / Q000473:pathology; D008297:Male; D011859:Radiography
keywords: Calcium pyrophosphate dihydrate crystal deposition disease; Tumoral pseudogout