<prompt> Kohlers disease involves:Femoral headNavicular boneTibial tubercleLunate bone  <response>: Navicular bone 269-MCommon osteochondritisNameSite affected Perthes disease- Femoral disease Fanners disease- Capitulum Keinbocks disease- Lunate bone Osgood shlatters disease- Tibial tubercle Severs disease- Calcaneal tuberosity Kohlers disease- Novicular bone Fricbergs disease- Metatarsal head Scheurmanns disease- Ring epiphysis of vertebrae Calves disease- Central bony nucleus of vertebral body 