I don't think hematologists study in depth about structural or compressive issues? Possibly more towards the chemical and diseases of the blood?
did a quick search...
[A medical specialist who treats diseases and disorders of the blood and blood-forming organs.
A physician specialized in disease of blood cells; most hematologists are also board certified in oncology Meat & potatoes diseases Anemia, leukemia, coagulopathies]
http://medical-dictionary.thefreedic...m/hematologist