【双语病例】烛泪样骨质增生症
History:A32-year-oldmanpresentswithchronicrightkneepainfollowingafallsixmonthsprior.
病史:32岁男性,6个月前摔倒后慢性右膝疼痛。
Radiographsoftherightkneeareshownbelow.
右膝平片以下所示。
MRIoftherightkneewasattainedforfurtherevaluationofthepatient’ssymptoms.
进一步行右膝MR扫描。
Findings
Radiographs:corticaldestructionisseen.
MRI:Sagittalfat-saturatedprotondensityimageoftherightkneedemonstratesahypointenselesionalongtheanteriortibialcortex,elesionisalsohypointenseonthecoronalT1-weightedimage.
平片:右膝正侧位片示未见明显骨折或脱位,可见1纵行硬化性病变沿胫骨近段干骺端前部走行。未见明显骨皮质破坏。
MRI:右膝矢状位脂肪抑制质子密度成像示低信号病变沿胫骨前缘皮质散布,和平片图象相对应,周围未见骨髓水肿,冠状位T1WI示病变也呈低信号。
Differentialdiagnosis
Melorheostosis
Osteopathiastriata
Myositisossificans
Osteofibrousdysplasia
Osteoidosteoma
Diagnosis:Melorheostosis
鉴别诊断:
烛泪样骨质增生症
条纹状骨病
骨化性肌炎
骨性纤维结构不良
骨样骨瘤
最后诊断:烛泪样骨质增生症
Keypoints
Melorheostosis
Pathophysiology
Melorheostosisisadefectinintramembranousboneformationleadingtoirregular,flowinghyperostosis.
Thereisapredilectionforthelongbonesofthelowerextremities.
Usuallyaffectsasingleextremity(canhavesingleormultiplefoci).
Etiopathogenesisispostulatedtobedevelopmental,relatedtodysfunctionalmesodermaldevelopmentinalimbbud,orasaresultofaninsulttospinalaccessorynerves.
Itisasporadic,nonhereditarycondition,butithasbeenassociatedwithmutationsintheLEMD3gene.
Naturalhistory:
Rateofhyperostosisisfasterinpediatricthanadultpatients.
Ittendstoprogressslowly,witheventualstabilizationduringadulthood.
病理生理:
烛泪样骨质增生症是一种由于膜内成骨的缺点而致使的不规则的条纹状骨肥厚。
好发于下肢长骨;通常累及单侧(可单发或多发)
病发机理认为可能与胚芽时期中胚层发育不良有关,或与脊副神经的伤害有关。
散发,非遗传性,但可能与LEMD3基因突变有关。
自然病程:小儿骨肥厚的比例高于成人;进展缓慢,在成人后终究稳定化。
Epidemiology
Typicallydiagnosedinadolescenceorearlyadulthood.
Thereisnogenderpredilection.
流行病学
多在青春期或成人初期诊断此病;
无性别优势。
Clinicalpresentation
Melorheostosisismost
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