OBJECTIVE: Radiologists are often challenged to review CT examinations of the skull without pertinent clinical information or plain radiographs. Skull lesions of fibrous dysplasia (FD) may often be confused with Paget disease (PD). The purpose of this article is to evaluate radiographic similarities and to find the signs that can differentiate PD from FD of the skull on head CT and to describe the CT imaging features of PD and FD. DESIGN AND PATIENTS: CT scans of the skull in eight cases of PD, 18 cases of FD (13 cases of skull and facial bones, five cases of only facial bones) and 10 normals were studied retrospectively. RESULTS: Ten features were found to be similar in PD and FD and 10 other features were found to be dissimilar. The frequency of the 10 differentiating features was evaluated to determine their reliability in distinguishing one disorder from the other. The differentiating features in order of significance include: (1) "groundglass" appearance, (2) symmetry, (3) involvement of the paranasal sinuses, (4) thickness of the cranial cortices, (5) involvement of the sphenoid bone, (6) orbital involvement, (7) nasal cavity involvement, (8) presence of a soft tissue mass, (9) maxillary involvement, and (10) the presence of cyst-like changes. CONCLUSION: These 10 signs improve the radiologist's skill in differentiating FD and PD.
OBJECTIVE: Radiologists are often challenged to review CT examinations of the skull without pertinent clinical information or plain radiographs. Skull lesions of fibrous dysplasia (FD) may often be confused with Paget disease (PD). The purpose of this article is to evaluate radiographic similarities and to find the signs that can differentiate PD from FD of the skull on head CT and to describe the CT imaging features of PD and FD. DESIGN AND PATIENTS: CT scans of the skull in eight cases of PD, 18 cases of FD (13 cases of skull and facial bones, five cases of only facial bones) and 10 normals were studied retrospectively. RESULTS: Ten features were found to be similar in PD and FD and 10 other features were found to be dissimilar. The frequency of the 10 differentiating features was evaluated to determine their reliability in distinguishing one disorder from the other. The differentiating features in order of significance include: (1) "groundglass" appearance, (2) symmetry, (3) involvement of the paranasal sinuses, (4) thickness of the cranial cortices, (5) involvement of the sphenoid bone, (6) orbital involvement, (7) nasal cavity involvement, (8) presence of a soft tissue mass, (9) maxillary involvement, and (10) the presence of cyst-like changes. CONCLUSION: These 10 signs improve the radiologist's skill in differentiating FD and PD.
Authors: Massimo Fusconi; Michela Conte; Martina Pagliarella; Chiara De Vincentiis; Armando De Virgilio; Anna Teresa Benincasa; Simone Alessi; Andrea Gallo Journal: J Neurol Surg B Skull Base Date: 2013-06-13
Authors: Ki Beom Bae; Jae Hwan Kwon; Young Ho Kim; Tae Young Jung; Joong Hwan Cho Journal: Clin Exp Otorhinolaryngol Date: 2008-12-26 Impact factor: 3.372
Authors: Sanjay Kumar Bhadada; Anil Bhansali; Sambit Das; Ramanbir Singh; R Sen; A Agarwal; B R Mittal; Uma Nahar; Pinaki Dutta; Niranjan Khandelwal Journal: Indian J Med Res Date: 2011-05 Impact factor: 2.375