Hello Kelly
A little of my history:
Papillary thyroid Cancer diagnosed Jun 2003, Modified neck dissection and
total thyroidectomy Nov 2003,
DFSP discovered during surgery (was suspected to be a sebaceous cyst!) but
turned out to be DFSP.
Anyway I have been reading a lot and some idea what this is.
I am sure you know all the basic stuff from links that J sent you.
DFSP: can recur locally. does not metastasize easily (but I dont believe in
statistics anymore, I am probably the ONLY person other than my grandmon in
the planet with both DFSP and thyroid cancer !!!)
First line of defense: surgery. Two schools of thought for this
1) Mohs Micrography: where the take slices of tumor and during surgery
itself look at it in the microscope. This way they hope to make sure that
they get negative margins and remove all the offending tissue without
removing good tissue. Les trauma. this is current gold standard
2) Wide excision: they take out a few cms of tissue around the tumor margin
and hope they have got it all. I am unfortunately in the situation of having
to go through wide excision because my primary DFSP is removed and my
head-and neck surgeon prefers to do wide excision. He is probably not
trained in Mohs micrography that bein the field of Dermatologists. but I
cannot afford to go to a dermatologist because I have had modified neck
dissection an total thyroidectomy and dont want oo many cooks in that
vulverable part of my neck. So I have to trust my head- and neck surgeon to
do his best.
DFSP-FS: this is amore aggressive form of DFSP, it has something called a
fibrosarcomatous change.
DF: this is considred benign.
They have to make sure it is not the FS variant of DFSP.
DFSP tissue can undergo special immunohistochemical staining to decide what
kind it is. DFSP regular stains for CD34- 50-100% of the cells, but DFSP-FS
stains for CD-34 less than 50% of the cells. The other stains that DFSP
stains are positive for Vimentin and p53 and negative for Factor Xiiia
DFSP tissue has low or scattered mitotic figures, DFSP-FS has high number of
mitotic figures
http://www.geocities.com/sampyroy2000/DFSP.html
DFSP occurs when the (PDGF) Platelet Derived Growth Factor gene fuses with
COL1A1 gene. The PDGF gene can no longer do its job correctly because its
fused with something else. PDGF is a potent cell division stimulant of
fibroblasts (connective tissue cells), smooth muscle and other connective
tissue.
If you have distant mets, they will probaby do chemotherapy, but I think
they will just do surgery because it may have locally recurred for you.
I found something called STI571 (imatinib) that is used to treat Chronic
MyeloProliferative Leukemia, regularly. this thing is supposed to inhibit
PDGF mediated growth.
Anita
(not a doctor- just reading enough to pass a couple of med schools exams

)