Boards Facts Flashcards
Genetic syndromes with increased risk of rhabdomyosarcoma
li-fraumeni syn
costello syn
NF1
beckwith-wiedemann syn
Two most useful stains for rhabdomyosarcoma
desmin +
myogenin +
positive stains in leiomyosarcoma
desmin, h-caldesmon, SMA, MSA
need positivity of at least 2
angiosarcoma risk factors
radiation, vinyl chloride, coal dust
pathognomonic feature histologically for angiosarcoma
intracytoplasmic lumina
What % of malignant peripheral nerve sheath tumors occur in NF1 patients
25-30%
Most common nerves affected by MPNST
vagal and vestibular cranial nerves
malignant triton tumor components
MPNST and rhabdomyosarcoma
recurrent PAX3-MAML3 gene fusion is seen in
Biphenotypic sinonasal sarcoma
t(2;4)
PAX3-FOX01 and PAX3-NCOA1 can be found in what two neoplasms
alveolar rhabdomyosarcoma
biphenotypic sinonasal sarcoma
most common non-rhabdomyosarcoma soft tissue sarcoma in children, adolescents and young adults is?
synovial sarcoma
greatest risk factor for synovial sarcoma
prior radiotherapy
What mutation is associated with sporadic cases of desmoid-type fibromatosis
CTNNB1 (85%) of sporadic cases
severe oncogenic osteomalacia has been reported in association with what lesion?
sinonasal glomangiopericytoma
What region of the beta-catenin gene is specifically implicated in glomangiopericytoma
GSK3beta region
3 risk factors (or associated factors) for development of hemangiomas
injury
hormonal factors
drug (vemurafenib)
Hemangiomas have a greater association with what genetic syndromes
sturge-weber syndrome
von hippel lindau disease
T/F angiosarcomas may arise within hemangiomas
false- angiosarcomas arise de novo
What is Horner syndrome and what lesion may cause this presentation
oculosympathetic palsy- decreased pupil size, a drooping eyelid and decreased sweating on the affected side of your face
“miosis, ptosis, anhidrosis”
-Caused by many things, one being tumors in the area and particularly a sinonasal schwannoma
What tumor of the sinonasal tract has a left sided predominance
meningioma
chondromesenchymal hamartoma may be the presenting sign for what genetic syndrome
pleuropulmonary blastoma-associated DICER1 familial tumor susceptibility syndrome
third most common sinonasal malignancy
sinonasal lymphoma
1. SCC 2. adneocarcinoma
What populations are more greatly affected by sinonasal extra nodal NK/Tcell lymphoma
east asian
indigenous populations of mexico, central and south america
two most common hematolymphoid tumors of the sinonasal region
extranodal NK/T cell lymphoma
DLBCL