Radiology Board Review

Retrograde cystography
Christmas tree
Spastic neurogenic bladder

Name of modality, finding, dx?

کلاس امشب رو از دست ندین

Typical case of Mirizi syndrome

One of RSNA case of the days....
Finding and dx?

می نویسم که "شب تار سحر می گردد"
یک نفر مانده ازین قوم که برمی گردد

Other examples

Intraosseous haemangioma are very slow-growing tumours that account for only 1% of all bone neoplasms. Spine is the most frequent location of haemangiomas and skull is the second most frequent location. Facial bone involvement is very rare. When haemangiomas appear in the facial bones, the most frequent location is in the maxilla, mandible, and nasal bones. There is a 3:1 female predominance and their prevalence peak is during the fourth and fifth decades of life.
The pathogenesis is not clear, but a possible antecedent of trauma is postulated.
Haemangiomas are benign vascular tumours  which can be histologically divided into 3 types: cavernous, capillary  and mixed.  Cavernous haemangioma are made up of clusters of dilated blood vessels, which are separated by fibrous septa, this type are usually presented in skull.
Haemangiomas in  vertebras are usually of the capillary type, which are rich in small vascular luminas without  much fibrous septa. Haemangiomas are generally asymptomatic but can manifest as painful, palpable masses and can cause facial deformation. When it affects the orbit, it can produce exophthalmos, diplopia, and loss of sight.
CT is the best imaging technique to define trabecular and cortical features in bone lesions. Haemangioma on CT, usually appears as a sharply expansive lesion with thin margins and a sunburst pattern of radiating trabeculae. ‘‘Soap bubble’’ and ‘‘honeycomb’’ patterns may also occur.
Although the inner and outer tables are often intact, outer layer could appear eroded. After contrast administration they generally show marked and homogenous enhancement. 
Haemangiomas on MR imaging usually appear as isointense lesions on T1-weighted images with scattered hyperintense foci due to fat components.
Due to the presence of vascular lacunae, haemangioma on T2-weighted images show as hyperintense lesion with multiple lobules.
As a vascular lesion, haemagiomas show strong homogenous enhancement on gadolinium T1-weighted images, better seen on fat-saturated images.
Total surgical excision is the treatment of choice, although  haemangiomas are slow growing tumours, treatment is not always necessary. Indications for surgery include  correction  of  a  mass effect, control of haemorrhage and esthetical problem. In this case the patient underwent a biopsy of the lesion. The anatomopathological diagnosis of the fragments of tissue obtained by curettage of bone lesion in the lateral orbital wall was a vascular tumour congruent with cavernous haemangioma. Prognosis after complete excision is excellent and recurrence is usually rare. Malignant transformation has only been reported  after radiation treatment, in recurrent cases.

bone lesion with trabeculated appearance in greater & lesser wing of rt sphenoid & lateral wall of orbit
dx:hemangioma

Description and dx?

Patient was a case of Motor to car accident.
GGO and cysts are seen at bilateral lungs.
Tiny pneumothorax is seen at the left side.

These findings are due to lung contusion (GGO) and post-traumatic pneumatoceles or lung laceration (presentation includes as cyst, cyst with air fluid level, cyst filled by hemmorage like a solid nodule).

Ddx of GGO and cyst:
PCP
LIP
DIP
Trauma

Hidden Hx, findings and ddx?

بهترین فرصت برای یادگیری و مرور کیس های توراسیک و ریه