Feb 09

History (HX):
Right hemiparesis, inconsciousness, Ataxia

Female   29 yr

Findings:
A large ICH in left frontal lobe in early subacute phase (low signal on T2WI and high signal on T1WI) with extensive peripheral edema.
Important note a small AVM as seprigenous signal void structures at posterior aspect of ICH

Diagnostic (DX):
Large ICH and SAH at left frontal lobe and a small AVM as the underlying cause

Feb 09

History (HX):
Headache   Female   16 yr

Findings:
Cystic mass in right cerebellar hemisphere high signal  on T2WI and low signal on T1WI with thin peripheral enhancement and mild surrounding edema.
Mass effect upon the brainstem and the 4th ventricle is noted resulting in obstructing hydrocephalus.

Diagnostic (DX):
Astrocytoma grade 2-3 (proved)

Feb 09

History (HX): Female   15 yr

Findings:
There is a large destructive mass at distal femoral metadiaphysis. Cortical destruction and extensive periosteal reaction with sunburst appearance are present. The mass is in close proximity with neurovascular bundle.

Diagnostic (DX):
Malignant small round cell tumor more probably Ewing sarcoma (proved)

Feb 08

History (HX):
Epilepsy for 10 years

Male   33 yr

Findings:
Multiple small subependymal nodules lining the lateral wall of the lateral ventricles which show same signal intensity as cortex (GM)Diagnostic (DX):
Nodular subependymal heterotopia

Discussion:
Contrast enhanced MRI is recommended to R/O remote possibility of Tuberous Sclerosis

Feb 08

History (HX):
Known case of breast cancer  (preoperative)

Female   yr

Findings:
A relatively large mass with irregular, spiculated margin in UOQ of right breast with heterogeneous increased signal intensity on T2WI. On dynamic post-contrast images the mass shows thick irregular rim enhancement with type III (rapid-washout) time intensity curve

Diagnostic (DX):
Invasive ductal carcinoma (biopsy proven) in right breast BIRADS VI

Discussion:
Dynamic contrast enhanced MRI of breast is increasingly    used as an adjunct to mammography and US to improve the detection and characterization of primary and recurrent breast cancers and for evaluation of the response to therapy. It is also useful for detecting multifacality and multicentricity of breast cancer

Feb 08

History (HX):
Known case of breast cancer

Female   48yr

Findings:
Numerous variable sized enhancing masses in cerebral and cerebellar hemispheres mainly at corticomedullary junction  as well as dural and leptomeningeal enhancement and mild to moderate communicating hydrocephalus

Diagnostic (DX):
Brain metastases and carcinomatose

Feb 08

History (HX):
Paresis and pain of right upper extremity after trauma (2 months ago) and fracture of right clavicle

Male   74yr

Findings:
A displaced bone fragment is pressing on the retroclavicular part of the Brachial plexus. Narrowing of the costoclavicular space is seen with impingement on the Brachial plexus by the malunited fragments

Diagnostic (DX):
Fractured clavicle with Brachial plexus injury

Discussion:
Clavicular fractures are occasionally responsible for lesions of the Brachial plexus. The symptoms are usually delayed and due to compression by hypertrophic callus, nonunion or a subclavian pseudo aneurysm

Feb 08

History (HX):
Pelvic mass Female   45yr

Findings:
A large 100 x 85 mm adnexal mass high signal on T1WI and diffusely low signal on T2WI with fat suppression

Diagnostic (DX):
Ovarian teratodermoid

Feb 08

History (HX):
Left hemiparesis for a few weeks

Male   51yr

Findings:
Large left paraspinal mass with cystic component and intraspinal extension through the neural foramina causing pressure effect upon the thecal sac and spinal cord, as well as similar lobulated masses involving the pleura and chest wall (ribs) posteriorly

Diagnostic (DX):
Hydatid disease (proved after surgery)

Discussion:

Feb 08

History (HX):
Metastatic adenopathy in left axillary region with no detectable mass in US and mammography

Female   47yr

Findings:
A 18 x 14 mm mass with lobulated, irregular margin at retroareolar region of left breast high signal on T2WI , low signal on T1WI and rapid washout enhancement (type 3 time intensity curve)

Diagnostic (DX):
Invasive ductal carcinoma in left breast

Discussion:
MR images can be helpful in identifying breast cancer that is mammographically and sonographically occult such as this case with known metastatic left axillary adenopathy and negative mammography and US