Hi Leanne,

I realize those who inserted notes thought it was "intralesione." I've seen that in many subject matters, "infra" and "intra" are sort of two sides of the same coin. So, I gave it a shot with Google (in English) and got 3 hits.

In your context, (administration of a drug if I am not mistaken), I liked best:

9. The pharmaceutical composition of claim 1 or 2 in sterile, injectable form for intravenous, infra-arterial, infra-muscular, intradermal, subcutaneous infraarticular, cerebrospinal, epidural, intracostal, intraperitoneal, intratumor, intrabladder, infra-lesion or subconjunctival administration.

from CIPO - Canadian Patent Database - Claims - 2326456

The two other sites are:

Organisation of the sympathetic skin response in spinal cord injuryFile Format: PDF/Adobe Acrobat
Palmar SSR. Plantar SSR. Light touch. Pin prick. Supra-lesion. stimuli. Infra-lesion. stimuli. Supra-lesion. stimuli. Infra-lesion. stimuli ...
jnnp.bmjjournals.com/cgi/reprint/72/3/356.pdf

SURGICAL TREATMENT OF POST-TRAUMATIC SYRINGOMYELIA BY ARACHNOID ...... in group D and in 10% in group R. At last follow-up, there was a statistically significant improvement in pain in the supra- and infra-lesion levels. ...
proceedings.jbjs.org.uk/cgi/content/abstract/87-B/SUPP_II/102-b

So, I wouldn't be so quick to assume it's a typo (unless, of course, the client confirms it as such).

GL!