Sun-Won Park1,2, Ji-Hoon Kim3, Ji Hoon Park4, Kyung Chul Moon5, Jin Chul Paeng6, Byung Se Choi4, Younghen Lee7, Jae Hyoung Kim4, Roh-Eul Yoo3, Koung Mi Kang3, Soo Chin Kim8, Seung Hong Choi3, Tae Jin Yun3, Chul Ho Sohn3. 1. Department of Radiology, Seoul Metropolitan Government - Seoul National University, Boramae Medical Center, Seoul, Korea. 2. Seoul National University College of Medicine, Seoul, Korea. 3. Department of Radiology, Seoul National University Hospital, Seoul, Korea. 4. Department of Radiology, Seoul National University, Bundang Hospital, Seongnam, Korea. 5. Department of Pathology, Seoul National University Hospital, Seoul, Korea. 6. Department of Nuclear Medicine, Seoul National University Hospital, Seoul, Korea. 7. Department of Radiology, Korea University Ansan Hospital, Ansan, Korea. 8. Department of Radiology, Gangnam Center, Seoul National, University Hospital Healthcare System, Seoul, Korea.
Abstract
BACKGROUND: Chondroblastoma commonly involves the temporal bone in the craniofacial region, but its imaging features have not been elucidated. This study aimed to describe the imaging features of temporal bone chondroblastoma with their pathologic correlation. METHODS: Radiopathologic correlation was performed in 5 patients with temporal bone chondroblastoma from our database and in 11 patients identified through a PubMed search. RESULTS: The cases of temporal bone chondroblastoma commonly involve the squamous part, temporal and infratemporal fossae, temporomandibular joint, and tympanic cavity, with the following features: high attenuation with calcification; heterogeneity; low signal intensity on T2-weighted imaging with enhancement; a smooth interface to the brain; and strong hypermetabolism on fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT. The heterogeneous low signal intensity on T2-weighted imaging was correlated with various histopathologic components, including calcification and hemosiderin deposition. CONCLUSION: Temporal bone chondroblastoma usually forms as an expansile, heterogeneous, hypermetabolic mass in the middle cranial fossa, frequently with low signal intensity on T2-weighted imaging, reflecting various degrees of calcification and hemosiderin deposition.
BACKGROUND:Chondroblastoma commonly involves the temporal bone in the craniofacial region, but its imaging features have not been elucidated. This study aimed to describe the imaging features of temporal bone chondroblastoma with their pathologic correlation. METHODS: Radiopathologic correlation was performed in 5 patients with temporal bone chondroblastoma from our database and in 11 patients identified through a PubMed search. RESULTS: The cases of temporal bone chondroblastoma commonly involve the squamous part, temporal and infratemporal fossae, temporomandibular joint, and tympanic cavity, with the following features: high attenuation with calcification; heterogeneity; low signal intensity on T2-weighted imaging with enhancement; a smooth interface to the brain; and strong hypermetabolism on fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT. The heterogeneous low signal intensity on T2-weighted imaging was correlated with various histopathologic components, including calcification and hemosiderin deposition. CONCLUSION:Temporal bone chondroblastoma usually forms as an expansile, heterogeneous, hypermetabolic mass in the middle cranial fossa, frequently with low signal intensity on T2-weighted imaging, reflecting various degrees of calcification and hemosiderin deposition.