Number and define all the medical terms in this MRI report. ( Impression - 9 words ) ( Findings - 5 words )

Impression: 10 cm long area of marrow edema and anterior periosteal edema in the mid tibial shaft is nonspecific in appearance. A developing stress fracture is a possibility although no discrete fracture line is visualized. There is an intramedullary blood vessel coursing through the area of marrow edema raising the possibility of vasculitis or acute bone infarction. Osteomyelitis from a hematogenous source is unlikely but can not be excluded. Radiographic follow up is recommended.

Findings: There is a 10 cm long area of marrow edema in the mid left tibial shaft. There is no cortical erosion or mass effect. There is a mid periosteal edema at the anteromedial margin of the tibial shaft. No fracture line is identified. An intermedullary blood vessel is seen to enter the posterior tibial shaft through a nutrient channel.