Table 2.

Immunohistochemical markers and cytogenic markers of dermatofibrosarcoma protuberans

MARKERS	METHOD	COMMENTS
CD34 and vimentin	Immunostaining	Helps in diagnosis of DFSP
CD117	Immunostaining	Used only for GIST susceptibility to imatinib
Apoplipoprotein B	Immunostaining	New marker for diagnosis of DFSP
COL1A1-PDGFβ	FISH	Confirms probable susceptibility to imatinib; diagnosis of DFSP if loss of CD34 observed
t(17;22)	RT-PCR	Confirms probable susceptibility to imatinib; diagnosis of DFSP if loss of CD34 observed