Oct 12
History (HX):
Pain and swelling of the right elbow and right ankle / clinical history of hemophilia, Male 13 yr
Findings:
-Hemosiderin deposing in synovial membrane around these joints low signal on both T1W and T2WI
-Subchondral and intraosseous cysts. Most of them high signal on T2WI and low signal on T1WI compatible with nonhemorrhagic fluid and some are low signal on both T1WI and T2WI representing fibrotic tissue and hemosiderin
-Small cortical erosions
Diagnostic (DX):
Hemophilic arthropathy
Discussion:
The differential diagnosis of synovial-based lesions hypointense on T2WI includes PVNS, GCT of tendon sheath, synovial chondromatosis, hemophilic arthropathy, amyloid , longstanding RA and siderotic synovitis
Oct 12
History (HX):
Palpable mass at right buttock and severe local pain history of fibromatosis at distal right thigh, Male 21 yr
Findings:
Relatively large mass at right buttock (within the gluteus maximus) with irregular margins which contains low signal foci on both T1WI and T2WI fs
Diagnostic (DX):
Fibromatosis
Discussion:
The fibromatoses are a group of soft tissue lesions characterized by proliferation of fibroblasts in an abundant collagen matrix and are prone to recurrence after surgery
Oct 12
History (HX):
Pain, swelling and irritation following IM injection (vaccination) at left thigh at birth, Female 3 months
Findings:
Thigh MRI shows, a large fluid-filled cystic lesion within the quadriceps femoris muscle with internal septations, perilesional edema and thick irregular enhancing wall and enhancing septations.
No evidence of osteomyelitis
Diagnostic (DX):
Abscess formation (proved with surgical drainage)
Oct 12
History (HX):
Dementia and progressive memory loss under treatment
Female 65yr
Findings:
Brain MRI shows diffuse cortical atrophy more prominent in the temporal lobes with temporal horn dilatation (more than 3 mm in diameter) and dilatation of choroidal-hippocampal fissure complex
Diagnostic (DX):
Alzheimer disease (dementia Alzheimer type or DAT)
Discussion:
AD is the most common dementing disorder. Increases in ventricular size, sulcal size, sylvian fissures size and total CSF volume are noted in patients with DAT compared with age-matched control subjects. Atrophy increases over time. The subiculum of the parahippocampal region appears to be most severely affected in DAT.
Oct 12
History (HX):
Female 61yr
Findings:
MIP images of contrast enhanced MRA of neck demonstrate complete obstruction of the left internal carotid artery just above its origin. Mild stenosis at proximal portion of the right ICA also noted.
Diagnostic (DX):
Thrombotic obstruction of the left ICA
Oct 12
History (HX):
RUQ pain and obstructive jaundice, Male 67yr
Findings:
MRCP (MIP and thick slab images) show:
Mild to moderate dilatation of the intrahepatic bile ducts and proximal CHD with a stenotic segments at insertion site of cystic duct
The gallbladder is contracted and contains a gallstone
Diagnostic (DX):
Extrahepatic cholangiocarcinoma (proved)
Oct 01
History (HX):
Trauma during sport, Male 36yr
Findings:
Axial T2WI show edema at anterior fascial compartment. Absence of the biceps tendon at the level of the radial head (its normal distal attachment site) is seen and at upper axial cuts an abnormally thickened and retracted biceps tendon is seen.
Diagnostic (DX):
Biceps tendon tear
Discussion:
The biceps tendon has two muscular components proximally consisting of a short head attaches to the coracoid process and a long head that attaches to the superior glenoid labrum. These two muscles fuse at upper portion of the arm and have a single distal attachment at the radial tuberosity
Oct 01
History (HX):
Palpable lesion at sublingual region, Female 27yr
Findings:
Cystic lesion at right sublingual region high signal on T2 fs and low signal on T1WI
Diagnostic (DX):Simple Ranula
Discussion:
Simple Ranula: Retention cyst resulting from trauma or inflammation of sublingual gland or minor salivary gland with epithelial lining , located above mylohyoid muscle.
Diving Ranula: When simple ranula becomes large, ruptures out posterior into submandibular space creating pseudocyst lacking epithelium lining
Oct 01
History (HX):
Unilateral nasal obstruction and epistaxis, male 14yr
Findings:
Large mass in right nasopharyngeal masticator space with intermediate signal intensity and multiple small flow voids within the mass indicating hypervascularity and diffuse enhancement
Diagnostic (DX):Juvenile angiofibroma (proved)
Oct 01
History (HX):
Hypothyroidism,male 9yr
Findings:
The pituitary gland is small and hypoplastic. The normal bright spot of the pituitary gland is ectopic and located at proximal portion of the infundibulum.
Diagnostic (DX):
Congenital pituitary deficiency disorder
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