D.D radiology

• Diseases causing periosteal reaction


  • Pericoronitis
  • Chronic Osteomyelitis
  • Garre's Osteomyelitis
  • Ewing's Sarcoma
  • Langerhans' Cell Disease
  • Metastatic Tumor
• Lesions with wispy septa


  • Aneurysmal
  • Cherubism
  • Central Giant Cell Granuloma
• Lesions with female predilection

  • Diffuse sclerosing osteomyelitis
  • Odontogenic Myxoma
  • Central Hemangioma
  • Aneurysmal bone cyst
  • Brown tumor of hyperparathyroidism
  • Fibrous Dysplasia ( Albright Syndrome )
  • Osteoporosis
  • PCOD
  • Cemento-ossifying fibroma
  • AOT
  • Complex Odontomas
  • Metastatic Tumors
• Anterior maxilla lesions


  • AOT
  • Incisive canal cyst
  • PCOD , FCOD (Anterior Mandible)
  • Compound Odontomas
  • Fibrous Dysplasia (Just Maxilla)
• Lesions with numbness & salty taste

  • Incisive canal cyst
• Massive expansion & cap RL

  Ameloblastic Fibroma
• Pseudocysts


  • Traumatic bone cyst
  • Latent bone cyst
  • Aneurysmal bone cyst
• Most common malignancy originating from surface epithelium is Peripheral SCC
• Lesions with pain


  • Pericoronitis ➜ Occlusal
  • Ameloblastic Fibroma ➜ Occlusal
  • Eosinophilic Granuloma
  • Cementoblastoma
  • Central Hemangioma ➜ Throbbing
  • Squamous cell carcinoma
  • Ewing's Sarcoma
• Lesions with scalloped border


  • Traumatic bone cyst
  • OKC
  • Odontogenic Myxoma
  • AOT
• Lesions with paresthesia


  • Ameloblastoma
  • Central hemangioma
  • Metastatic tumors
  • SCC
  • Fibrosarcoma
  • Osteogenic sarcoma
  • Ewing sarcoma
  • Lymphoma
  • Multiple myeloma
• Lesions with floating teeth


  • Metastatic Tumors
  • SCC
  • Fibrosarcoma
  • Eosinophilic granuloma
  • Periodontitis
  • Osteomyelitis
  • Papillon-Lefevre syndrome
  • Langerhans' cell disease
• Lesions with root resorption


  • Ameloblastoma
  • Dentigerous cyst (adjacent teeth)
  • ICC
  • Residual cyst (adjacent teeth)
  • Radicular cyst
  • Hemangioma
  • Aneurysmal bone cyst
  • CGCG
  • Cementoblastoma
  • Multiple myeloma
• Rebound mobility & Serpiginous path

  Central Hemangioma
• Superior displacement of IAC

  Fibrous Dysplasia
• Multiple OKCs, skeletal abnormalities and calcification of falx cerebri

  Basal cell nevus syndrome
• Most common malignancy in bone in adults


  • Multiple Myeloma
  • Osteogenic Sarcoma
• Ill-defined periapical RL


  • Periapical Abscess
  • Infected Cyst
  • Eosinophilic Granuloma
  • Malignant tumors
• Lesions with gingival bleeding


  • Eosinophilic Granuloma
  • Central Hemangioma
  • LCH
• Lesions with +ve aspiration


  • OKC → KOT
  • Mural Ameloblastoma
  • COC → CCOT
• Lesions below IAC


  • Fibrous Dysplasia
  • Latent bone cyst
• Giant cell lesions


  • Hyperparathyroidism
  • Cherubism
  • Aneurysmal bone cyst
  • CGCG
• Lesions with cotton wool appearance

  • Florid OD
  • Diffuse sclerosing osteomyelitis
  • Paget's disease ( Mature )
  • Fibrous Dysplasia
• Ballooning expansion


  Aneurysmal bone cyst
• Lesions with hypercementosis


  • Fibro-osseous lesions
  • Paget's disease
• Lesions with tennis racket appearance


  • Odontogenic Myxoma
  • Central Hemangioma
• Lesions with sunray appearance


  • Osteogenic Sarcoma
  • Ewing's Sarcoma
  • Central Hemangioma
• Low back pain & Bence Jones protein

  Multiple Myeloma
• Progressive anemia + Reversal of albumin/globulin ratio


  Multiple Myeloma
• Most common odontogenic tumor is Odontomas
• Lesions crossing the midline


  • Aneurysmal bone cyst
  • Central giant cell granuloma
  • OKC
  • Traumatic bone cyst
  • Odontogenic Myxoma
• Lesions with ground glass appearance


  • Hyperparathyroidism
  • Paget's disease
  • Fibrous Dysplasia
• Lesions with radiolucent rim


  • Cemento-ossifying Fibroma
  • Odontomas
  • Cementoblastoma
• Lesions with punched-out appearance (non-corticated)

  • LCH
  • Multiple Myeloma
  • Hyperparathyroidism
  • Metastatic tumor
• Lesions with high recurrence rate

  • Ameloblastoma
  • Odontogenic Myxoma
  • OKC
• Fibro-Osseus lesions


  • Fibrous Dysplasia
  • Ossifying Fibroma
  • Cementoblastoma
  • Osseous Dysplasia
• Radiolucent & Mixed lesions


  • Ameloblastic Fibroma
  • OKC
  • AOT
  • COC
  • CEOT
  • Gardner's Syndrome
• Multiple idiopathic osteosclerosis


  • Multiple Osteomas
  • Multiple Odontomas & impacted teeth
  • Multiple Fibromas
  • Multiple Polyps in large intestine
  • Liability for malignant transformation
• Cleidocranial Dysplasia features


  • Hereditary tendancy
  • Deficient or absent clavicles
  • Delayed Closure of fontanelles
  • Short stature
  • Multiple impacted supernumerary teeth
  • Multiple dentigerous cysts
  • Dilaceration of the roots
  • Small maxilla, high arched palate
• Cystic fluid characteristics


  • Straw colored cystic fluid (Cysts)
  • Viscous yellow fluid (COC)
  • Thick yellow cheesy material (OKC)
  • A few ml of Serosanguinous fluid (Traumatic bone cyst)
  • Hemorrhagic fluid (Aneurysmal bone cyst)
  • Cystic yellow fluid (Mural Ameloblastoma)
  • Blood (Central hemangioma)