Granuloma annulare

Granuloma annulare is a benign idiopathic inflammatory disorder of the dermis, characterised by formation of dermal papules in young children.

Clinical presentation

Granuloma annulare most commonly seen in kids between 2-12 years old and usually it occurs in exterminates. One typical location is pretibial when the lesion is subcutaneous. It has various clinical presentations:

  • three cutaneous forms
  • one subcutaneous form: presenting as soft tissue mass

Radiographic features

Plain radiograph

These have very little value. The only manifestation is non-specific increased density in the subcutaneous compartment without involvement of bone involvement or mineralisation.

Ultrasound

Shows ill-defined solid mass that is hypoechoic to surrounding fat. It excludes a vascular of cystic lesion.

MRI
  • T1: ill-defined subcutaneous mass, isointense to muscle
  • T2: slightly hypointense signal intensity compared with fat, but may also show heterogeneous hyperintense signal
  • T1 C+: diffuse enhancement can be seen
Share article

Article information

rID: 40034
Synonyms or Alternate Spellings:
  • Subcutaneous granuloma annulare

Support Radiopaedia and see fewer ads

Updating… Please wait.
Loadinganimation

Alert accept

Error Unable to process the form. Check for errors and try again.

Alert accept Thank you for updating your details.