<prompt> What is Kienbochs diseaseOsteochondritis of lunateOsteochondritis of neck of femurOsteochondritis of navicularOsteochondritis of tibial condyle  <response>: Ans. is a i.e osteochondritis of lunate Ref. : Maheshwari 3e p269 2e, p268JOsteochondritis :These are a group of miscellaneous affections of the growing epiphysis in children and adolescents.Typically, a bony nucleus of the epiphysis affected by osteochondritis becomes temporarily softened; and while in the softened stage it is liable to deformation by pressure.Common osteochondritis NameSite affectedPerthes diseasePannes diseaseKienbocks diseaseOsgood shlatters diseaseSever s diseaseKohlers diseaseFreibergs diseaseScheurmanns diseaseCalves disease- Femoral head most common- Capitulum- Lunate bone- Tibial tubercle- Calcaneal tuberosity- Navicular bone- Metatarsal head- Ring epiphysis of vertebrae- Central bony nucleus of vertebral body Note that this is a very important chart and must be learnt very well. I had a method to remember it. I placed them in an order of sites affected from hand to foot and then made a mnemonic for the names. Site affectedName of diseaseMnemonicIn order from hand to foot Lunate boneKienbocks diseaseKhaike CapitulumPanners diseasePaan Ring epiphysis of vertebraeScheuermanns diseaseSupreme Central bony nucleus of vertebral bodyCalve s diseaseCourt Femoral headPerthe s diseasePassed Tibial tubercleOsgood shlatter s diseaseOrder to Calcaneal tuberositySevers diseaseSever Navicular boneKohlers diseaseKohls Metatarsal headFriebergs diseaseFreedom 