ear Flashcards
most common benign tumor of middle ear
glomus tumor
glomus tumor is also known as
paraganglioma
chemodectoma as it resembles carotid body
types of glomus tumor
1 glomus jugulare arise from dome of jugular bulb
2 glomus tympanicum
arise from promontory along course of 9th and 10 th nerve
most common site for glomus tumor is
hypotympanum
most common benign tumor of ext auditory canal
exostosis
is glomus tumor is vascular
yes it is highly vascular main blood supply is ascending pharyngeal artery
most common cranial nerve involved by glomus tumor are ??
facial nerve followed by last 4 cranial nerve
is glomus tumor capsulated ?
no it is noncapsulated ,locally invasive
cell 9f origin of
glomus tumor is
chief cells which contain ach,catecholamines and serotonin
zellballen is ??
classic finding of clusted of chief cells k/a zellballen highly vascular may bleed substantially during surgical excision
glomus tumor can be multicentric T/F
T ie it can originate from more thn 1 site
IOC for glomus tumor is
CT scan
earliest symptoms of glomus tumor are
deafness
tinnitus
kind of tinnitus in glomus tumor
pulsatile and of swishing character
synchronous with pulse and can be stopped by carotid pressure
otoscopy finding of glomus tumor
red reflex
rising sun appearence tympanic membrane appears bluish and bulging
wht is pulsation/brown sign
it is seen in glomus tumor
tumor pulsates big when ear canal pressure is raised with siegels speculum
aquino sign is ???
blanching of mass with manual compression of ipsilateral carotid artery
Phelps sign is seen in
glomus jugulare ie absence of normal crest bw carotid canal and jugular fossa on lateral tomography
pulsatile tinnitus is seen in
glomus tumor
arterial》 av malformation of temporal bone ,carotid subclavian atherosclerosis venous 》 high jugular bulb,benign ICT
symptoms of glomus tumor when it presents as polyp
profuse bleeding from ear
audible bruit heard by stethoscope since it secrete catecholamines and produce headache ,sweating ,flushing
