Yes, back in the eighties, they tried treating my daughter with steroids.
These actually to stop the spleen working, then by withdrawing the steroids to, sort of, kick=start the spleen to work properly.
It did not work with her.
She had left home a year earlier, then lost her job, and when she went to her GP saying how tired she always felt, she was told she was 'depressed' due to her falling out with her parents, and no job, etc.
It was only when she became really poorly that I made her come back home and visited GP with her and insisted on blood tests, that her condition (and by that time it was extremely bad), was discovered.
One outward sign can be with round marks, like small circles of small bruises on arms, etc. Potentially, it can be very dangerous so needs proper medical intervention.