Synovial haemangioma

Synovial haemangiomas are rare benign vascular malformations that occur in relation to the joint. It is sometimes considered a sub type of soft tissue haemangiomas.

The lesions typically present in children and young adults. Occasionally patients can have recurrent haemarthroses 8.

Patients may have pain, swelling and/or limited joint mobility.

The lesions can be cavernous, capillary or mixed. 

Location

Most lesions tend to occur around the knee 1.

Plain film

Plain film findings are generally nonspecific and may be seen a soft tissue mass adjacent to the knee. Accompanying phleboliths may be present. 

MRI

Typically seen as a lobulated intra-articular mass (although the lesions can be either lobulated of diffuse).

Signal characteristics include:

  • T1: usually of intermediate signal 4
  • T2 
    • markedly hyper intense background ; likely from pooled blood within vascular spaces 4
    • low-signal-intensity linear structures within lesion ; likely from fibrous septa or vascular channels 4
    • fluid-fluid levels may be present 
  • T1 C+: marked enhancement 5

Imaging differential considerations include

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Article Information

rID: 10925
Tag: cases
Synonyms or Alternate Spellings:
  • Synovial hemangioma
  • Synovial hemangiomas
  • Synovial haemangiomas
  • Synovial haemangiomata

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