-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
-
Cosmetic Ingredient
- Water Treatment Chemical
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
Female, 55 years old, headache
.
【Image Performance】
MR showed a cystic mass lesion in the left middle cranial fossa, similar to cerebrospinal fluid signal; The left temporal and frontal lobes are displaced, there is no peripheral edema, MR enhancement shows no strengthening of the lesion, and adjacent sphenoid and temporal bones are deformed
.
【Final diagnosis】
Arachnoid cyst.
【Discussion】
Arachnoid cysts are nonneoplastic fluid accumulations outside the brain, accounting for 1% of all traumatic intracranial mass lesions, most commonly in the temporal fossa (50%), and occur in the pontine-cerebellar angle, paracerebellar space, annular pool, tetraassic pool, suprasellar pool, and hemispherical space
.
Most are congenital and do not communicate
with cerebrospinal fluid.
Clinically, corresponding symptoms
occur due to compression of local nerve tissue.
MR manifests as a circular-like long T1 long T2 signal with no surrounding edema
.
MR enhancement without reinforcement
.
Diagnosis is not difficult
.
