Neuroblastoma
Neuroblastoma Updated by Jingya Wang Background What are the 3 types of neuroblastic tumors? 3 types of neuroblastic tumors: 1. Neuroblastoma (NB) 2. Ganglioneuroblastoma 3. Ganglioneuroma These tumors differ in…
GENERAL RADIOLOGY
Medulloblastoma
Medulloblastoma Updated by Nikhil G. Thaker BACKGROUND Estimate the annual incidence of medulloblastoma (MB) in the U.S. What is its frequency relative to other CNS tumors in children? ~500 cases/yr…
Retinoblastoma
Retinoblastoma Updated by Vinita Takiar BACKGROUND What is the incidence and median age for presentation of retinoblastoma (RB)? 250–300 cases/yr of RB; 95% <5 yo (1 yo for familial, 2…
Ependymoma
Ependymoma Steven H. Lin, Ori Shokek, and Updated by Mark Edson BACKGROUND In children and adults, what % of brain tumors are ependymomas? Children: 5% (3rd most common childhood CNS…
Langerhans Cell Histiocytosis
Langerhans Cell Histiocytosis Updated by Mark Edson BACKGROUND What is the estimated annual incidence of Langerhans cell histiocytosis (LCH) in the U.S.? ~1,200 cases/yr of LCH in the U.S. It…
Rhabdomyosarcoma Updated by Vinita Takiar
Rhabdomyosarcoma Updated by Vinita Takiar BACKGROUND What are the 3 most commonly tested rhabdomyosarcoma (RMS) cases on the radiation oncology oral boards? Bladder (trigone), parameningeal (PM), and orbit What are…
Ewing Sarcoma
Ewing Sarcoma Updated by Randa Tao WORKUP/STAGING What is the annual incidence of Ewing sarcoma (EWS) in the U.S.? How common is it relative to other bone tumors? 200 cases/yr…
Protection and Quality Assurance in Bone Densitometry
(1) where, D(z) is the radiation dose profile along the axis of rotation, N the number of data channels used in a particular axial acquisition, and T is the slice…
of Insufficiency Fractures
Fig. 1 Anteroposterior radiograph of the pelvis demonstrates areas of sclerosis in both sacral ala (arrows) consistent with insufficiency fractures Fig. 2 Axial MRI (STIR-sequence) of the pelvis demonstrating bone marrow edema…
in Osteoporosis
Fig. 1 Bony cortical changes with age. a Frontal hand radiograph of a 18-year-old woman shows normal cortical thickness in all the bones. b Frontal hand radiograph of a 40-year-old woman…
