there is this brand new trial:
"A Pharmacokinetic Study of Subcutaneous and Intravenous MabThera (Rituximab) in Patients With Follicular Lymphoma
This study is currently recruiting participants.
Verified by Hoffmann-La Roche, October 2009"
http://clinicaltrials.gov/ct2/show/NCT00930514
I also remember a couple of years ago there was talk of injecting RTX into the intraperitoneal cavity to combat lymphoma that was localized there.
I recently had 8 weekly Rituxan iv infusions. I have never heard of subcutaneous.
Please let us know if you find out.
Lorrie62