Conversation: The conversation between human and AI assistant.
[|Human|] Hello!  I am 34 years old and have 2 boys.  I am pretty healthy.  I have had back pain since the birth of my 2nd son who is now 4 years old.  I had an MRI done and it states I have a suspected annular tear on my L4-L5.  It also says "imaging through the lumber spine demonstrates heterogeneously low signal of the bone marrow".  What does this mean?
[|AI|]  HIT hank for asking to ChatDoctorIn MRI heterogeneous intensity of signal is very common encounter, it means that the diversity is there, and the nature of signals are also different, this indicates so many pathologies of musculoskeletal system to some time soft tissues, and that need to be correlated with clinical history of patient, as you have given history of backache, so the chances of lumber spondylosis is more likely if you do not have neurological deficit, if you have neurological problem then the interpretation would be in that sense only, have nice day.