Aftercare will have to be especially looked after until the dermis heals. Depending on the size of the letters you will have an area of skin that will be sort of like "road rash", and need to heal. Because you are undergoing Chemo, you are going to heal much more slowly. As JulieJ indicated find someone experienced with cancer patients, has a great reputation, and is willing to take the time to get to know you if possible. Look over the shop, make sure they have an Autoclave to sterilize their equipment. Watch them work sometime, and see how they set up and dispense their ink, use new needles, clean and disinfect their work areas. Sometimes they can be some pretty scary looking individual's doing this sort of artwork, but you need to look beyond that. The guy that did mine and my wife's tattoo's was really scary looking. He has evil killer clowns as tattoo's, all over, His entire back is a Harley V-Twin engine, and he has graying hair in a long braided pony tail all the way to his ass, a great busy beard, and is a hard core Biker. An advertising agency once asked around to locate the scariest looking biker in the Detroit area, everyone named Chris. He owns his own shop has been the mentor to several other very talented artists. He is actually a VERY nice fellow. A truly talented artist will likely be able to give you an idea of something more than just OTMF.
Cool Idea - and I wish you luck.
DW 53 dx Jun 2013
CT mets Liver Spleen lung. IVb CEA~110
Jul 2013 Sig Resct
8/13 FolFox,Avastin 12Tx mild sfx, Ongoing 5-FU Avastin every 3 wks.
CEA: good marker
7/7/14 CT Can't see the spleen Mets.
8/16/15 CEA Up, CT new abdominal mets. Iri, 5-FU, Avastin every 2 wks.
1/16 Iri, Erbitux and likely Avastin (Trial) CEA going >.
1/17 CEA up again dropped from Trial, Mets growth 4-6 mm in abdomen
5/2/17 Failed second trial, Hospitalized 15 days 5/11. Home Hospice 5/26, at peace 6/4/2017