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):
Palpable mass and pain during a few months

Male   39 yr

Findings:
Large well-marginated solid and cystic mass in lower abdomen and pelvis behind the urinary bladder and above the rectum suggestive of a retropritoneal mass.
The solid components of the mass shows marked enhancement on post-Gd images.

Diagnostic (DX):
Low grade spindle cell sarcoma in favour of schwannoma (proved)

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):
Right flank pain

Female   34yr

Findings:
On KUB a calcified lesion with irregular margin at right side of pelvis with a barely visible surrounding lucent mass. Following IV injection of contrast medium a well-defined fat-containing mass with a calcified component (tooth?) at right side of pelvis causing extrinsic pressure effect upon the urinary bladder

Diagnostic (DX):
Dermoid cyst of right ovary (incidental finding in IVP)

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):
Paresis of both upper limbs and right lower limb

Male   75yr

Findings:
Sagital and axial T2WI show symmetric, longitudinally ariented zones of high signal intensity involving the dorsal columns of the spinal cordDiagnostic (DX):
Subacute combined degeneration of the spinal cord (SDC of the spinal cord)

Discussion:
Intramedullary signal abnormalities can resolve after correction of the vitamin B12 deficiency

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