Kalmar “diaphyseal” sifa ce da ke nuni da gangar jikin wani dogon kasusuwa, wanda ke tsakanin iyakar kashi biyu (Epiphyses). Musamman, yana da alaƙa da diaphysis, wanda shine tsayi, ɓangaren tubular kashi wanda ke da alhakin ba da tallafi da tsari ga kashi. A cikin kalmomin likita, ana amfani da kalmar "diaphyseal" sau da yawa don bayyana karaya ko wasu raunin da ke faruwa a cikin ramin dogon kashi.