Chiari 1 Malformation
History: 15 year old boy with headache and arm numbness. This is a case of a Chiari 1 malformation, which is is defined as caudal extension of the cerebellar tonsils 5 mm below the foramen magnum. Syringomyelia (syrinx) is seen in one-half of the patients, and it is not associated with other neurulation malformations. There are three main types […]
Solution to Unknown Case #31 – Osteopetrosis or Marble Bone Disease
History: male with headache. This is a case of osteopetrosis, also referred to as marble bone disease. In osteopetrosis, bones become abnormallly hardened, as opposed to osteoporosis where bone mineral density is abnormally decreased and osteomalacia where bones are abnormally soft. Osteopetrosis is thought to be caused by impaired osteoclast activity, resulting in impaired bone […]
Unknown case #31 – Skull radiograph
History: male with headache. What is your differential diagnosis? Comment and share below.
Solution to Unknown Case # 13 – Fibrous Dsyplasia of the Skull Base
History: 10 year old girl with headaches and facial deformity. This is a case of fibrous dysplasia of the skull base. Fibrous dysplasia is a congenital bone disease resulting from abnormal osteoblast differentiation which results in the replacement of normal bone with a mixture of fibrous tissue and immature woven bone. It usually occurs in […]
Unknown Case # 13 – Pediatric Head CT
History: 10 year old female with headaches and facial deformity. What is your differential diagnosis for this 10 year old girl with headaches?
Unknown Case # 8 – Pediatric Skull Radiograph
History: Infant with congenital abnormality. What is your diagnosis? What is the term for this finding? What are its associations? Comment, like, pin, and share below!
Acute Sinusitis
History: 45 year old female with congestion and headache. This is the appearance of acute sinusitis on CT. Sinusitis is inflammation of the sinuses as a result of infection with a virus, bacteria, or fungus. Usually patients do not need imaging for diagnosing sinusitis as it is diagnosed clinically by history and physical exam. However, sinusitis […]
Odontogenic Sinusitis
History: 50 year old man with headache. This is a case of odontogenic sinusitis, which is inflammation in a sinus adjacent to odontogenic infeciton or sinusitis as a result of sinus entry during dental surgery. The differential diagnosis includes sinus disease of other origins such as fungal sinusitis or bacterial superinfection after a viral URI, […]
Glioblastoma Multiforme – Ring Enhancing Lesion Differential Diagnosis
History: 55 year old male with new onset seizures. This case is a nice example of a ring enhancing mass in the brain. The typical mnemonic used for a solitary ring enhancing mass in the brain is MAGIC-DR which stands for Metastases, Abscess, Glioblastoma Multiforme, Infarct, Contusion, Demyelinating disease (tumefactive multiple sclerosis), and Radiation Necrosis […]
Subarachnoid Hemorrhage
History: 60 year old male with severe headache. This is a case of subarachnoid hemorrhage. Typically sudden onset non-traumatic subarachnoid hemorrhage is the result of a ruptured cerebral aneurysm, however, in this case the distribution of subarachnoid hemorrhage is not typical for a ruptured aneurysm, and may be related to other causes such as supratherapeutic […]