Quadrigeminal cistern lipoma

Quadrigeminal cistern lipomas make up approximately 25% of intracranial lipomas and are located within the quadrigeminal cistern. They may be associated with hypoplasia of the inferior colliculus or agenesis of the corpus callosum.

For a general discussion please refer to the article on intracranial lipomas.

They are usually asymptomatic and are usually found incidentally. Rarely do they cause mass effect resulting in seizures or hydrocephalus 7.

CT and MRI findings are characteristic for a fat-containing mass or lesion, however located in the quadrigeminal cistern. 

CT demonstrates a lobulated, non-enhancing fat density mass in the quadrigeminal cistern. Peripheral calcifications can be present in some cases. 

MRI reveals signal characteristic of fat:

  • T1: high signal intensity
  • T2: high signal intensity 
  • T1 C+ (Gd): no enhancement
  • fat saturated sequences: low signal intensity
  • SWI: can produce blooming due to susceptibility artifact 8

Lipomas, in general, are mostly asymptomatic. If there is mass effect causing seizures or hydrocephalus, then surgical management can be considered 4,6,7

Differentials specific to its location (quadrigeminal palate) include tectal plate glioma or mass, tectal plate cyst, arachnoid cyst, dermoid cyst and epidermoid cyst 7.

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Article information

rID: 1946
Tag: stub
Synonyms or Alternate Spellings:
  • Quadrangeminal plate cistern lipoma
  • Quadrangeminal plate lipoma
  • Quadrangeminal plate lipomas
  • Quadrigeminal cistern lipomas

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