Granuloma annulare most commonly seen in kids between 2-12 years old and usually it occurs in extremities. One typical location is pretibial when the lesion is subcutaneous. It has various clinical presentations:
- three cutaneous forms
- one subcutaneous form: presenting as a soft tissue mass - subcutaneous granuloma annulare
These have very little value. The only manifestation is non-specific increased density in the subcutaneous compartment without involvement of bone involvement or mineralization.
Shows ill-defined solid mass that is hypoechoic to surrounding fat. It excludes a vascular of cystic lesion.
- 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
- 1. Shehan JM, El-Azhary RA. Magnetic resonance imaging features of subcutaneous granuloma annulare. Pediatr Dermatol. 2005;22 (4): 377-8. doi:10.1111/j.1525-1470.2005.22427.x - Pubmed citation
- 2. De Maeseneer M, Vande Walle H, Lenchik L et-al. Subcutaneous granuloma annulare: MR imaging findings. Skeletal Radiol. 1998;27 (4): 215-7. Pubmed citation
- 3. Kransdorf MJ, Murphey MD, Temple HT. Subcutaneous granuloma annulare: radiologic appearance. Skeletal Radiol. 1998;27 (5): 266-70. Pubmed citation
- 4. Vandevenne JE, Colpaert CG, De Schepper AM. Subcutaneous granuloma annulare: MR imaging and literature review. (1998) European radiology. 8 (8): 1363-5. doi:10.1007/s003300050553 - Pubmed