CT – Coronal + CCT – Axial + CWhere is the abnormality?
Left side of the neck.
How can the abnormality be described?
Multiple enlarged neck clustered lymph nodes, with some of them showing necrosis.
What is the differential diagnosis?
Infectious lymphadenitis: such as TB or pyogenic lymphadenitis. Metastasis: particularly from head and neck malignancies. Treated lymphoma or lymphoma in immune compromised patient.
4 images of the right shoulder were obtained (axillar, Y-view, internal rotation, external rotation)
Click here to see the imagesY-view
Internal rotationExternal rotationFindings:
Findings
Right shoulder: There is a nondisplaced fracture involving the inferior aspect of the glenoid, with involvement of the articular surface. Glenohumeral joint shows normal alignment. Acromioclavicular joint is normal. No soft-tissue calcification. No fracture or dislocation
What is the most likely diagnosis?
The most likely diagnosis is Hill-Sachs lesion
Hill-Sachs lesions are a posterolateral humeral head compression fracture. Typically occurs secondary to recurrent anterior shoulder dislocations. It is often associated with a Bankart lesion of the glenoid
Internal RotationExternal Rotation
These lesions are best seen following relocation of the joint. It appears as a sclerotic line running vertically from the top of the humeral head towards the shaft. A wedge defect may be evident in large lesions. The lesions are better appreciated on internal rotation views
89-year-old female patient with aplastic anemia. Showing CT images without contrast media. What do you see?
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CT images without contrast media: Subacute isodense right subdural hematoma, revealed with narrowing of right cerebral hemispheric sulci and right lateral ventricle and minimal midline shift (red arrows), acute left subdural hematoma (blue arrow)
43-year-old healthy patient:
– with fibromyalgia
– No other relevant medical history
What do you see on the following images?
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IMAGING FINDINGS:
Multiple focal sclerotic bone lesions clustered around joints in both knees and sacroiliac joints
DIAGNOSIS:
Osteopoikilosis
TEACHING POINTS:
Sclerosing bony dysplasia characterized by multiple enostoses
Typically clustered around joints, aligned parallel to trabeculae. Usually 1-3 mm, they can reach up to 20 mm
Rare condition; inherited; asymptomatic; incidental
Important to avoid misdiagnosis with other relevant pathologies such as metastasis
The jugular bulb bulges into the left middle ear cavity with absence of the sigmoid plate separating the jugular bulb from the middle ear in keeping with dehiscent jugular bulb.
It is one of the causes of pulsatile tinnitus, patients can also present with conductive hearing loss if the jugular vein contacts the tympanic membrane.
There is a small lucency anterior to the vestibule, just lateral to the basal turn of the cochlea. Consistent with fenestral otosclerosis.
There are two types of otosclerosis:
1- Fenestral: is the most common type. It involves the bone anterior to the oval window and causes conductive hearing loss.
2- Retro-fenestral: involves the cochlear capsule and causes sensorineural hearing loss.
The two types can occur simultaneously.
* Right upper quadrant & epigastric pain
* History of gastric bypass surgery
What aquatic sign is used for the finding in the red circle?
Whirlpool sign
What is shown at the blue arrow?
The transition point from dilated small bowel (with the “small bowel feces sign”) to non-dilated small bowel at the site of internal herniation through a mesenteric defect.
Lytic lesion on distal fibular metaphysis with well-defined sclerotic borders is seen on both anteroposterior (a) and oblique (b) radiographs
What do you see?
NOF: non ossifying fibroma
– Most common fibrous bone lesion
– Same as fibrous cortical defect but larger version
– If large enough, may cause pathological fractures
– One of DON’T TOUCH lesions