• Café au Lait Spots:

  • "Coast of California": Associated with Neurofibromatosis (Type 1).

  • "Coast of Maine": Associated with Fibrous Dysplasia.

• Carpet Tack Lesions: Characteristic of Discoid Lupus Erythematosus.

• Cerebriform Tongue: Seen in Pemphigus Vegetans.

• Charcot's Triad: Seen in Multiple Sclerosis, characterized by:

  • Intention tremor

  • Nystagmus

  • Dysarthria

• Chipmunk Facies: Seen in Thalassemia.

• Chvostek's Sign: Indicative of Hypoparathyroidism (facial muscle twitching upon tapping the facial nerve).

• Buffalo Hump: A characteristic clinical sign of Cushing's Syndrome (fat pad on the upper back).

Infective osteomyelitis

• Tuberculous osteomyelitis
• Syphilitic osteomyelitis
• Actinomycotic osteomyelitis

Tuberculous osteomyelitis

• Non healing sinus tract formation
• Age group affected is around 15 – 40 years.
• Commonly seen in phalanges and dorsal and lumbar vertebrae.
• Usually occurs secondary to tuberculosis of lungs.
• Cases have been reported where mandibular lesions were not associated with pulmonary disease.
• Another common entrance is through a carious tooth via open pulp.
• Usually affects long bones and rare in jaws.
• Results when blood borne bacilli lodge in cancellous bone. Usually in ramus , body of mandible. may mimic parotid swelling or submassetric abscess.

Syphilitic osteomyelitis

• Difficult to distinguish syphilitic osteomyelitis of the jaws from pyogenic osteomyelitis on clinical & radiographic examination.
• Main features are progressive course & failure to improve with usual treatment for pyogenic osteomyelitis.
• Massive sequestration may occur resulting in pathologic fracture.
• If unchecked, eventually causes perforation of the cortex.

Actinomycotic Osteomyelitis

• The organisms thrive in the oral cavity, especially tissues adjacent to mandible.
• May enter the bone through a fresh wound, carious tooth or a periodontal pocket at the gingival margin of erupting tooth.
• Soft or firm tissue masses on skin, which have purplish, dark red, oily areas with occasional zones of fluctuation.
• Spontaneous drainage of serous fluid containing granular material.
• Regional lymph nodes occasionally enlarged.
• Mimics parotitis / parotid tumors

• Inverted Pear-shaped Radiolucency: Globulomaxillary cyst.

  • Associated teeth need not be non-vital.

  • Klestadts’s cyst: Soft tissue variant of Globulomaxillary cyst.

• Tear Drop-shaped Radiolucency: Lateral Periodontal Cyst.

  • Associated teeth are vital.

• Cluster of Similar Cysts / Cluster of Grapes: Botryoid Odontogenic Cyst.

• Stevens-Johnson Syndrome (SJS):

  • Characterized by ulcers with hemorrhagic crusts.

  • Typically has an acute onset following drug exposure (mainly sulfa group drugs).

• Biopsy for Vesiculobullous Pathology: Should be taken from the margin of the vesicle/bulla, including a significant amount of normal-appearing mucosa, to capture the pathological changes and adjacent healthy tissue for comparison.

• Linea Alba: A white, bilateral line on the buccal mucosa associated with pressure, frictional irritation, or sucking trauma from the facial surface of teeth.

• Morsicatio Buccarum: Chronic irritation seen on the buccal mucosa as a result of suction and glassblowers (chewing habits).

• Riga-Fede Disease: Sublingual ulcerations in infants resulting from chronic mucosal trauma from adjacent primary teeth (often natal/neonatal teeth).

1. Nasopalatine cyst is the most common non-odontogenic cyst
2. Globulomaxillary cyst entity is controversial - many consider it a variant of lateral periodontal cyst
3. Median mandibular cyst is extremely rare - always consider other diagnoses first
4. Nasolabial cyst is the only one with no radiographic features
5. All these cysts are developmental in origin

Quick Facts for MCQs:

• Oval + Maxillary midline = Nasopalatine cyst
• Pear-shaped + Between teeth = Globulomaxillary cyst
• Soft tissue swelling + No X-ray changes = Nasolabial cyst
• Mandibular midline + Rare = Median mandibular cyst

MEMORY AIDS

"NASAL" for Nasopalatine Cyst:

• Non-odontogenic (most common)
• Anterior maxilla
• Spacing of centrals
• Above/between central incisors
• Location: incisive canal

"PEAR" for Globulomaxillary:

• Pear-shaped (inverted)
• Enlarges slowly
• Adjacent to lateral incisor & canine
• Root divergence

"SOFT" for Nasolabial:

• Soft tissue cyst
• Obstruction of nose
• Fold involvement (nasolabial)
• Tissue only (no bone involvement)

📝 QUICK MEMORY AIDS

1. "Paget's Patients Prefer Tight Dentures" - Paget's disease causes denture tightening
2. "Fibrous Faces Feel Funny" - Fibrous dysplasia features (leontiasis, Chinese script, ground glass, hockey stick)
3. "Giant Cells Have Three Homes" - Hyperparathyroidism, Cherubism, Central Giant Cell Granuloma

⚡ HIGH-YIELD FACTS

• Chalk-stick fractures: Paget's disease & Osteopetrosis
• Leontiasis ossea: Paget's, Fibrous dysplasia, Cemento-ossifying fibroma
• Chinese script pattern: Fibrous dysplasia & COF
• Ground glass appearance: Fibrous dysplasia & Hyperparathyroidism
• Giant cells + vascular stroma + hemosiderin: Hyperparathyroidism, Cherubism, CGCG
• Triads to remember: Hutchinson's, Melkersson-Rosenthal, Ascher syndrome