股骨头水肿鉴别诊断英文课件.pptVIP

GA T1 Spontaneous osteonecrosis of the knee (SONK) T1 Spontaneous osteonecrosis of the knee (SONK) T2 Low signal area Spontaneous osteonecrosis of the knee (SONK) 55 y. Osteoarthritis Osteoarthritis variants osteonecrosis insufficiency fracture Femoral head edema T1 T2 FS PD Subchondral band in impaction fracture + 3 months + 18 months Spontaneous healing T1 T1 T2 Spontaneous healing Subtle depression of the bone plate 55 y. Osteoarthritis Osteoarthritis variants osteonecrosis insufficiency fracture Femoral head edema 55 y. Osteoarthritis (+variants) Osteonecrosis Insufficiency fracture Transient BM edema Transient osteoporosis Transient bone marrow edema Male, 35-55 y. Hip pain Transient (3?-6 months) Spontaneous Idiopathic Hot spot bone scan Normal X-rays Edema of the femoral head Transient osteoporosis Male, 35-55 y. Hip pain Transient (3?-6 months) Spontaneous Idiopathic Hot spot bone scan Marked osteoporosis on X-rays Edema of the femoral head Bloem JL Radiology 1988;167:753 T1 T2 FS PD Initial + 3 months + 6 months ??Transient osteoporosis?? ??Transient edema?? Coronal T1: fem head edema ? In conclusion, Moderate decrease in signal intensity Ill-delimited margins Predominates in subchondral area Femoral head edema Differential diagnosis Bruno Vande Berg, Frédéric Lecouvet, Baudouin Maldague, Jacques Malghem St Luc University hospital, Brussels, Belgium Definition Histology Differential diagnosis Bone marrow edema of the femoral head Bone marrow edema: A generic term used by radiologists to describe a lesion pattern that suggests an ongoing abnormal process in the bone marrow at MRI Moderate decrease in signal intensity on T1 – not very low Ill-delimited – no sharp margins Subchondral area involvement- may extend in femoral neck Bone marrow edema of the femoral head T1 Intermediate to high on SE T2 T1 T2 T1 T2 T1 + C Very low signal Sharp margins Slight decrease no margins subchondral Edema NOT edem