Oncology Flashcards
Mazabraud’s syndrome
multiple intramuscular myxomas associated with monostotic or polyostotic fibrous dysplasia
t(12;16)
myxoid liposarcoma
t(17;22)
dermatofibrosarcoma protuberans
codes for PDGF beta chain/collage type 1 alpha 1 fusion protein
Inhibits PDGF receptor tyrosine kinase
imatinib
used in dermatofibrosarcoma protuberans in particular t(17;22) mutation
estrogen receptor beta positive
desmoid tumor
t(2;13)
alveolar rhabdomyosarcoma
Pax3-FKHR fusion protein
alveolar rhabdomyosarcoma
small round blue cell tumors of children
- neuroblastoma (rosette pattern)
- rhabomyosarc
- non hodgkin lymphoma
- Ewing’s sarc
- blastemic component of Wilm’s tumor
- Mesenchymal chondrosarc
MyoD1 positive myoglobin positive myosin positive desmin positive vimentin positive
rhabdomyosarcoma
actin and vimentin immunoreactivity
cigar shaped cells on histo
leiomyosarcoma
arise in nonmyelinating Schwann cells with biallelic inactivation of NF1 tumor-suppressor gene
neurofibroma
loss of neurofibromin leads to increased of what?
increased RAS activity
affects RAS dependent MAPK activity which is essential for osteoclast function and survival
positive S100 stain
keratin staining is negative
bag of worms transformation
Malignant peripheral nerve sheath tumor
Verocay bodies
Neurolemomma (Schwanoma)
composed of two rows of aligned nuclei in a palisading formation
Antoni A - spindle cells
Antoni B - less cellularity
most common sarcoma of the foot
synovial sarcoma
lung most common site of mets.
Rare in that it does metatasize to lymph nodes (SCARE)