Cyst Part 4 And 5 Flashcards
Origin of naso labial cyst
Soft tissue cyst of upper lip arise from:
Misplaced epithelium of nasolacrimal duct
Or epithelial remnants at line of fusion
()military and medial casal
processes
Nasoalveolar cyst is bi or unilateral?
Bi in 10% only
Most vommon developmental cyst of the neck?
Thyroglossal tract cyst
What could stimulate the thyroglossa duct remnants to transform into cyst?
Inflammation of neighbouring lymph nodes
And familial occurrence
Thyroglossal tract cyst can it transform to neoplasm
Yes
1% adenocarcinoma
Thyroglossal cyst clinically
Mention size
- moves with the tongue
- less than 3cm
Branvhial cleft cyst clinically
- could be bilateral
- ant to sternomastoid
- could be painful if infected
Oral lymphoepithelial origin
-entrapment of oral epi or salivary gland within oral lymphatic tissue during embryogenesis
Oral lymphoepithelial clinically
-Age any age but most common in young adults
L Floor of the mouth.
The ventral surface and posterior lateral border of the tongue . The area of the palatine tonsil and
soft palete,
3. Signs & symptoms:
a) Asymptomatic small submucosal nodule white or whitish
yellow.
b) Firm or soft to palpation. smooth and non-ulcerated overlying mucosa
Mucous retention cyst site
-parotid gland
-minor salivary gland
Like at the floor of the mouth
Palate
Buccal mucosa
Rare at lower lip
Teratoma
Tumor of one of the 3 germ layer cells
Choristoma
Normal tissue in abnormal location
Origin of detmold and epidermoid cyst
Entrapment of totipotent blastomere cells in midline between mandibular and hyoid branchial arches
Dermoid and epi dermoid clinically
- young age
- in midline of floor of the mouth if above geniohyoid muscle ==elevation of tongue and difficulty mustication and speech
- if below that muscle== submental swelling
Epstein pearls also called
Palatal cyst of newborn
Bohn nodules
Epstein pearls
Entrapment of epi between the palatal shelves
Found along med palatal raphe
Bohns nodules
Inclusion cyst
Remnants of minor salivary gland entrapped in the palate
Scattered all over the hard palate specially near the soft palate
How often does palatal cyst of newborn occur and describe it
65%to 85% of newborn
It’s self limiting
1 to 3 mm
Multiple
Names of traumatic cyst
Simple
Solitary
Hemorrhagic
Idiopathic
Static bone cyst names
Stafne bone defect
Dev.ling mand. Salivary gland depression
Latent cyst
Site of traumatic cyst?
- mand >max
- posylterior to canine
Traumatic cyst xray
Above mand canal
Scalloped upper border
Unilocular
Static cyst bi ot uni
COULD be bi
Location of static cyst and xray pic
Lingual of mandible
In line with 3rd molar
Or superimposed over apices of ant teeth
Below mand canal level
Static cyst is from what gland
Submandibular if post
Sub ling if ant
Cyst that doesn’t cause expansion of bone?
- static
- traumatic
- okc early on
Pathogenesis of aneurysmal cyst
Change in hemodynamics (vascular supply) eg. AV shunt, dilated vascular bed causing resorption of bone by osteoclasts.
✔Trauma-+ blood clot formation break down of clot rather than organization → necrotic tissue→→ cyst formation.
2ry reaction to a previous lesion like CGCG - OR fibrous dysplasia
Site of aneurysmal bone cyst?
-long bones
Mandible
Aneurysmal cyst signes?
- Rapid expansion of bone
- fusiform or rounded
- painful
- when periosteum Is opened a profuse bleeding like blood soaked sponge occurs
- young adults
- also in long bones
Xray of aneurysmal cyst
- subperiosteal blowout
- cortical exp.and thinning
- uni but mainly multilocular
Glands that cause ranula?
Sublingual mainly
Less often sub mandibular
Cysts that elevate the tongue and interfere with mustication and speech…
- ranula
- epidermoid and dermoid if above the geniohyoid ms
