Muscle & Fat Tumors Flashcards
what does the suffix leio- mean?
smooth muscle
what does the suffix rhabdo mean?
skeletal muscle
where do you find smooth muscle in the oral cavity?
VESSEL WALLS
are muscle tumors common or rare in the oral cavity
RARE
how do leiomyomas present clinically
- FIRM, MOVEABLE submucosal nodules
- looks like a cheek bite
just by the name, what do you know about rhabdomyosarcoma?
it is MALIGNANT and it involves skeletal muscle
are rhabdomyosarcomas common
NO
what are the 3 variants of rhabdomyosarcoma?
- EMBRYONIC (kids, worst prognosis)
- PLEOMORPHIC (adults)
- ALVEOLAR (least common)
of the 3 variants of rhabdomyosarcoma, which has the worst prognosis?
they all have a very poor prognosis
what is the MOST COMMON MALIGNANT soft tissue tumor in children?
rhabdomyosarcoma
what chromosome is associated with rhabdomyosarcoma?
chromosomal translocation in the PAX3-FOX01 fusion gene
what are the most common mesenchymal neoplasms of the head and neck region?
lipomas (benign tumors of fat)
what are multiple lipomas in the oral cavity called?
LIPOBLASTOMATOSIS
where do most lipomas occur?
in the buccal mucosa
how do lipomas present histologically?
- WELL DIFFERENTIATED
- univacuolated fat cells will be set in a thin fibrous connective tissue stroma
