GREETINGS

SWAMI VIVEKANAND SUBHARTI UNIVERSITY.

MEERUT

CYSTS OF THE JAWS

DIAGNOSIS AND MANAGEMENT

Dr.VISHAL BANSAL

(Professor and Head)

Subharti Dental College

Latin - Cystis Greek – Kurtis Meaning a pouch, bag, bladder

A “cyst” is defined as a pathological

cavity usually but not always lined

by epithelium containing fluid,

semisolid or gaseous material and

which is not formed by accumulation

of pus.

Pathogenesis of cyst

1. Initiation

2.Cyst formation

3.Cyst enlargement

Dental lamina will proliferate and forms the tooth

OKC GINGIVAL CYST OF NEW BORN GINGIVAL CYST OF ADULT LATERAL PERIODONTAL CYST GLANDULAR ODONTOGENIC CYST

CELL RESTS OF SERRES

DENTIGEROUS CYST

ERUPTION CYST

LATERAL PERIODONTAL CYST

AOC

CEOC REDUCED ENAMEL EPITHELIUM REMNANTS

OKC

Offshoots of basal cells of Oral epithelium

PERIAPICAL CYST

RESIDUALCYST

RESTS OF MALASSEZ

Cyst Enlargement

1. Attraction of fluid into the cystic cavity

2. Retention of fluid within the cavity

3. Production of raised internal hydrostatic pressure

4. Resorption of surr. bone with an increase in size of bony cavity

According to Harris cyst enlargement

1. Mural growth

Peripheral cell division

Accumulation of cellular content

2. Hydrostatic enlargement

Secretion

Transudation/exudation

Dialysis

3. Bone resorbing factors

Peripheral enlargement of a cyst Enlargement results from division of the lining epithelial cells

Peripheral cell division

Cyst of Oral & Maxillofacial tissues

Cysts of jaws

Cysts associated with maxillary antrum

Cysts of soft tisuues of face, neck and

salivary glands

Cysts of Jaws

Epithelial

Developmental

Odontogenic

(arising from odontogenic tissue)

Non-odontogenic

(arising from ectoderm involved in development of facial tissues)

Inflammatory

Non-epithelial

Classification A. Epithelial Lined Cysts

1. Developmental

a. ODONTOGENIC

i. Gingival Cyst of infants

ii. Odontogenic keratocyst

iii. Dentigerous Cyst

iv. Eruption Cyst

v. Gingival Cyst of adults

vi. Developmental lateral periodontal cyst

vii. Botryoid odontogenic cyst

viii. Glandular odontogenic cyst

ix. Calcifying odontogenic cyst

b. NON-ODONTOGENIC

i. Midpalatal raphe cyst of infants

ii. Nasopalatine Duct (Incisive Canal) Cyst

iii. Nasolabial Cyst

2. Inflammatory origin

i. Radicular cyst, apical and lateral

ii. Residual cyst

iii. Paradental cyst and juvenile paradental cyst

iv. Inflammatory collateral cyst

B. Non-Epithelial cysts

1. Solitary bone cyst

2. Aneurysmal bone cyst

II. Cysts associated with the maxillary antrum

1. Mucocele

2. Retention cyst

3. Pseudocyst

4. Postoperative maxillary cyst

III Cysts of the soft tissues of mouth, face and neck 1. Dermoid and epidermoid cyst

2. Lymphoepithelial (Branchial cyst)

3. Thyroglossal duct cyst

4. Anterior median lingual cyst (intralingual cyst of foregut origin)

5. Oral cysts with gastric or intestinal epithelium (oral alimentary tract cyst)

6. Cystic hygroma

7. Nasopharyngeal cyst

8. Thymic cyst

9. Cysts of the salivary glands: mucous extravasation cyst; mucous retention cyst; ranula; polycystic (dysgenetic) disease of the parotid

10. Parasitic cysts; hydatid cysts; cysticercus cellulosae; trichinosis

Clinical Presentation of cysts Asymptomatic when small (less than 2cm)

Swelling- slowly enlarging, painless unless infected

Facial asymmetry; obliteration of furrows on face

Frequent fractures of dentures or displacement of dentures

Migration/mobility of adjacent teeth/non-vital

teeth/retained/missing tooth

Pain- only when acutely infected

Discharge- salty taste/maxillary sinusitis

Paresthesia-if fracture occurs or infection causes sudden

increase in pressure over nerve

To rule out solid/cystic lesions

Differentiate between antrum and lesion

Straw- coloured with shiny cholesterol crystals- Dentigerous cyst

Golden-yellow colored fluid---- Radicular cyst

Whitish- if infected or keratocyst

Blood – hemangioma/ aneurysmal bone cyst

Serosanguinous or gas – simple bone cyst/ maxillary antrum

Putty like – keratocyst/dermoid

ASPIRATION

Straw- colored fluid

Golden yellow fluid – Radicular cyst

White cheesy material

Black-colored fluid

CYST CONTENTS

• Fluid comprising cellular breakdown products:

• Serum proteins (usually <4gm/100ml in OKC)

• Water and electrolytes

• Cholesterol crystals

• Parakeratinized squames(OKC)

Radiological Features

Round structureless radiolucency with continuous radiopaque margin.

Infection causes loss of radio opaque margin

Root resorption may be seen

Inferior dental nerve may be displaced

Differential anatomic landmarks

Mental foramen

Incisive foramen

Maxillary antrum

Nasal fossa

Reasons to treat cyst --

Increase in size – cause – facial deformity & destroy surrounding bone

Eventually become infected.

Objective of treating cyst--

Removal of lining or re-arrangement of position of

abnormal tissue to ensure its elimination from the jaw

Conservation of healthy teeth

Preservation of adjoining vital structures like

neurovascular bundle, integrity of maxillary antrum

Restoration of affected area to its original form and

shape by enucleation or marsupialization

General Principles of Management

Parstch I (1892) Marsupialization

Old & Medically compromised patients; cyst involving apices of many teeth, involved teeth need to erupt in oral cavity. Large cyst where enucleation may cause # of jaw

Whole lining cannot be removed or required for histopath; may result in incomplete removal

Long term care

Parstch II (1910) Enucleation

Small cyst; mural lesion, fissural cyst or OKC

Full specimen available for histo path

Early restoration of function

Other considerations in treatment

Extraction of involved teeth

RCT and apicoectomy of involved teeth

Drainage of dead space

Marsupialization of large maxillary cyst into

antrum - Nasal Antrostomy may be required

GINGIVAL CYST OF INFANTS • Small, superficial keratin-filled cysts

• Found on the alveolar mucosa of infants.

•Appears discrete white swelling

•Can be single or multiple.

•Arise from remnants of the dental lamina.

• Disappear spontaneously by rupture into the oral cavity

• Similar inclusion cysts (e.g., Epstein' s pearls and Bohns nodules) are also found in the midline of the palate or laterally on the hard and soft palate.

DENTIGEROUS CYST / FOLLICULAR CYST

Coined by Paget in 1863

The dentigerous cyst is defined as a cyst that originates by the

separation of the follicle from around the crown of an unerupted

tooth .

Most common type of developmental odontogenic cyst

Develops by accumulation of fluid between the reduced enamel

epithelium and the tooth crown.

Frequency --- 1.44 cyst for every 100 unerupted tooth.

The cyst nearly always involves or is associated with the crown of

a normal permanent tooth.

Seldom involves a deciduous tooth.

CLINICAL FEATURES With the crown of impacted tooth, may be found with

complex or compound odontoma or involving the

supernumery teeth.

Most common site mandibular and maxillary molar area

and maxillary cuspids .

Most lesions present in second and third decade with slight

male predilection

Male female ratio 3:2

Most dentigerous cyst are solitary,,Bilateral and multiple cyst

found in association with number of syndromes including cleido

cranial dysplasia, maroteaux- lamy syndrome

Potentially capable of becoming an aggressive lesion.

Expansion of bone with subsequent facial asymmetry, extreme

displacement of teeth, root resorption of adjacent teeth and

pain are possible sequel by continued enlargement of cyst.

RADIOLOGICAL FEATURES Unilocular radiolucent area that is associated with the

crown of an unerupted tooth.

The radio lucency usually has a well-defined and often

sclerotic border, but an infected cyst may show ill -

defined borders.

A large dentigerous cyst may give the impression of a

multilocular process because of the persistence of bone

trabeculae within the radiolucency.

Infected Dentigerous cyst

The Central variety

The lateral variety is usually associated with mesioangular impacted mandibular third molars that are partially erupted.

In the circumferential variant, the cyst surrounds the crown and extends for some distance along the root so that a significant portion of the root appears to lie within the cyst .

DIFFERENTIAL DIAGNOSIS

Ameloblastoma or ameloblastic fibroma

If the cyst involving the anterior maxilla

adenomatoid odontogenic cyst would be

the prime consideration in young patient

Cyst involving maxillary antrum

ODONTOGENIC KERATOCYST /KOT

Robinson-----term primordial cyst.

The term Keratocyst was coined by Philipsen in 1956 based on

the histologic appearance of the lining.

In 2005 WHO - KOT because of High mitotic activity, Epithelial

turnover rate and prostaglandin induced bone resorption.

More common in the mandibular third molar and ramus region.

CLINICAL FEATURES

Peak incidence in second and third decade.

More frequently in males specially in black

Asymptomatic unless infected .

On aspiration odourless creamy or caseous content.

Maxillary OKC tends to be secondarily infected due to

close proximity to maxillary sinus.

Multiple OKC found in:-

Gorlin goltz syndrome

Marfan syndrome

Ehler-Danlos syndrome

RADIOGRAPHIC FEATURES

Mainly unilocular presenting well defined

peripheral rim, may contains the crown of

retained tooth.

Multilocular OKC also observed with scalloping of

borders.

In some cases produce the root resorption.

DIAGNOSIS Aspiration – cheesy material

keratin flakes

Protein content - <4 gm/100 ml

Lactoferin also present some times in

keratocyst fluid

Biopsy- Parakeratinized and Orthokeratinized.

DIFFERENTIAL DIAGNOSIS Dentigerous cyst

If cyst in ant region- adenomatoid odontogenic cyst

Unilocular primordial origin keratocyst resembles a lateral periodontal cyst, if located b/w premolars

Multilocular presence with ameloblastoma/odontogenic myxoma/ central giant cell tumor

Less common but well known to be central arteriovenous hemangioma.

Recurrence Thin fragile epithelium

Incomplete removal/ residual cystic lesion gives rise to

new cyst formation (microcysts, daughter cysts)

New keratocyst develop from epithelial offshoots of basal

layer of oral epithelium – satellite cysts

High recurrence is seen in area associated with teeth

were not removed during surgery.

Continuous formation of new cysts in patients with basal

cell nevus syndrome

TREATMENT

Recurrence rate

14.3% in 28 patients

(Paul Edwards JOMS

2006)

0% IN 10 cases Pogrel

et al JOMS

62:651:2004

Marsupialization

ENUCLEATION AND CURETTAGE recurrence rate 17.79% (Zaho et.al 000 2002)

18% Stoelinga PW (JOMS 63;1662; 2005)

Pre op

Post op

ENUCLEATION AND PERIPHERAL OSTECTOMY Recurrence rate is 18.2% (Morgan et al JOMS 63;635:2005

ENUCLEATION AND CHEMICAL CAUTERIZATION result in cell death and necrosis and penetrates bone depth 1.54 mm after 5 minutes. Common disadvantage is injury to nerve if exposure >5 min and necrosis of surrounded tissue. Recurrence rate 2.5% in 40 cases Voorsmit et al( JOMS 1981) 6% (Stoelinga PW. JOMS;63:1662: 2005)

Carnoy’s Solution Absolute alcohol 6 ml Chloroform 3 ml Glacial acetic acid 1 ml Ferric chloride 1gm

ENUCLEATION AND CRYOTHERAPY

Liquid nitrogen produce cellular necrosis in bone while preserving in organic osseous framework and maintain the osteogenic and osteoconductive properties.

Cycles - 1- 5- 1- 5 F – T - F- T

Bone depth 0.82 mm <20 degree

centigrade cell death . Recurrence rate 11.5 % in 26

cases Brain et al (JOMS 2001)

Advantages of Marsupialization followed by Enucleation

Keratocyst lining is transformed into nonkeratinizing epithelium-less aggressive nature.

Decrease interleukin alpha level one of the factor in OKC enlargement.

Cyst lining becomes thickened and thus easy to enucleate.

Cost effective.

RESECTION Marginal or segmental in most extensive form 0% recurrence rate used in aggressive and recurrent cases.

ERUPTION CYST

The eruption cyst is the soft tissue analogue of the

dentigerous cyst.

Mostly seen in children with eruption of primary or

permanent incisors and molars.

Manifestate as expansile and compressible swelling.

Lateral periodontal cyst/OKC 1.Primordial cyst arises from dental lamina rests.

2.Lies within the interadicular crestal or mid root level bone.

3.Tear drop unilocular radiolucency, no root resorption and

divergence of roots.

4.Tooth will be vital, no mobility of teeth.

Calcifying odontogenic cyst COC like OKC clinically, radiographically and

histopathologically is a unique specific cyst.

Unlike OKC it has a less aggressive behavior with

little recurrence potential.

Pathogenesis- cell responsible are dental lamina

rests(rests of Serres). COC are of primordial origin

and are not associated with impacted teeth.

Radiographic features- 3 types of pattern-

A. Salt and pepper pattern of flecks

B. Fluffy cloud like pattern throughout

C. Crescent shaped pattern on one side of radiolucency in a New Moon like configuration.

Odontogenic ghost cell tumor

ADENOMATOID ODONTOGENIC CYST

Cystic hamartoma arising from odontogenic epithelium.

It has a lumen lined by epithelium from which proliferation fill much and some time all the lumen space mimicking a solid tumor.

CLINICAL FEATURES

Cyst will present expansile lesion usually in anterior region of either jaw.

some time referred as two third tumor because two third occur in maxilla ,

In young women ,

two third in anterior maxilla

two third with canine tooth. It may be discovered by rapid clinical expansion

NASOPALATINE DUCT CYST / INCISIVE CANAL CYST/MEDIAN PALATINE CYST

Arise from the epithelial remnants of the two embryonic nasopalatine ducts.

Tooth Vitality test

DIFFERENTIAL DIAGNOSIS Periapical granuloma

Radicular cyst

Mesiodens

Rare entity chondrosarcoma

TREATMENT

Best treated by enucleation

NASOLABIAL CYST / NASOALVEOLAR CYST

Soft tissue cyst originating from embryonic epithelial elements of nasolacrimal duct.

Swelling of the upper lip lateral to the midline, resulting in elevation of the ala of the nose.

Obliterates the maxillary mucolabial fold .

RADICULAR CYST Most common cyst.

Inflammatory cyst associated with the root apex of non vital tooth due to high incidence of pulpal pathology

Can occur at any age but seldom seen in children despite the high incidence of pulpal and periapical pathology in this group, which implies that these are few in any epithelial rests that result from the development of primary teeth.

Causes—carious tooth, previous restoration, failure of RCT, trauma.

CLINICAL FEATURES 60% of jaw cyst are radicular cyst

The tooth is seldom painful or even sensitive to percussion. Rarely produce expansion of cortical bones . In some cases such a cyst of long standing may undergo acute exacerbation of the inflammatory process and develop rapidly into an abscess that may proceed to cellulitis or form a draining fistula. The incidence is high in maxilla most frequently located anteriorly Male prediliction .

Radiographic features Round or oval RL with marked sclerotic

margin.

Less than 2 cm is periapical granuloma.

Rarely root resorption is seen.

Differential Diagnosis

Periapical granuloma

In early osteolytic phase-----Periapical cemento-osseous dysplasia

RESIDUAL CYST

Radicular cyst that is retained in the jaws after removal of the associated tooth.

SOLITARY BONE CYST/ HEMORRHAGIC BONE CYST/ TRAUMATIC BONE CYST

Benign, empty, or fluid containing cavity within bone

that is devoid of an epithelial lining.

Proposed theory - Trauma to the bone that is insufficient

to cause a fracture results in an intraosseous hematoma.

If the hematoma does not undergo organization and

repair, it may liquefy, resulting in a cystic defect.

CLINICAL FEATURES Simple bone cysts with in the jaws are

common more common in the premolar and molar areas. Mostly in patients between 10 and 20 years of age. The lesion is rare in children under age 5 yrs Seldom seen in patients over age 35. Simple bone cysts of the jaws are essentially restricted to the mandible. May be seen in maxilla.

DIFFERENTIAL DIAGNOSIS Odontogenic keratocyst confirm by aspiration Enlarged medullary cavity and Gauchers disease.

CAVITY CONTENTS Cavities are usually empty but may contain

golden yellow fluid, clot when present indicates a recent haemorrhage.

MANAGEMENT Intra lesion steroid injections or thorough surgical curettage.

Simple surgical exploration to establish the diagnosis is usually sufficient therapy.

ANEURYSMAL BONE CYST Term first used by Jaffe and Lichtenstein in 1942.

Term Aneurysmal used in context relates to Blow Out distension of

affected bone area.

Etiopathogenesis-

1.Modification of some other lesion of bone most of which had been

destroyed by haemorrhage(CGCG and fibrosseous lesion).

2. Result of some of the vascular disturbances.

C/F-

1. Peak incidence in 2nd and 3rd decade of life.

2. Most common site is

angle and ramus of mandible.

3. Rapid growth.

4. Pain?

5. History of trauma?

6. Mobility of teeth

Treatment modalities

1. Curettage – 53% - 68% of recurrence.

2. Curettage with cryotherapy- decrease recurrence

3. Radiotherapy- chances to develop sarcomatous changes

4. Resection and reconstruction- 8% of recurrence

Thyroglossal tract cyst

Arise from stimulated residual epithelial cells from

descent of embryonic oral epithelial cells.

60% occur in midline over the thyrohyoid

membrane.

2% occur in tongue deep to foramen cecum

23% occur in midline below the level of thyrohyoid

membrane.

Clinical features

Doughy round mass with smooth

rounded surface

Moves with hyoid bone when

patient swallows

Diagnostic radiographs

CT, MRI can confirm cyst’s fluid

filled center

Treatment

SISTRUNK PROCEDURE Horizontal neck incision- will protrude from between two sternohyoid muscles. Fluid is aspirated and equal volume of soft tissue liner or alginate is filled. It prevents collapse of cystic spaces and helps pericapsular dissection, thus cyst is separated from its surrounding tissues. Body of hyoid is resected and residual tract deep to it is clamped and ligated.

Branchial cyst

Residual or buried epithelium from branchial cleft.

Alternative- epithelium of salivary origin, becomes embryonically entrapped with in cervical lymph nodes and later undergoes cystic degeneration.

Arise rapidly 1-3 weeks as a mass in neck, just anterior and deep to SCM.

Diagnostic- 1.Brown watery fluid on aspiration. 2.FNAC

Diagnostic workup- 1. Metastatic squamous cell carcinoma 2. Hodgkin’s lymphoma 3. Tubercular lymph nodes

Treatment- Excised by pericapsular

dissection.

Dermoid Cyst Uncommon in maxillofacial region- 2% Most commonly found in submental triangle external or oral to mylohyoid muscle. Painless compressible and mobile. Double chin appearance. Displace the tongue and interferes

with speech.

Diagnostic work up- straw coloured fluid or semisolid mixture of keratin

D/D-

Ranula

Sublingual salivary gland tumor

T/T-

Removed by transoral and transcutaneous approach.

THANK YOU