Delayed onset of inflammatory nodules following hay fever desensitization injections

The development of scar sarcoidosis at the site of desensitization injections

Tender nodules may develop at the site of injection of allergen extracts. Some cases can be related to the aluminium contained in the preparation. We report a case where scar sarcoidosis developed at the site of desensitization injections. At presentation, there were no other cutaneous signs of sarcoidosis; systemic signs only developed 2 years later. We suggest that sarcoidosis be considered as a cause of granulomata developing at sites of desensitizing injections, particularly when aluminium is not involved.

Cutaneous granulomata complicating desensitization

D-VAC Pollens (Bencard), a standard depot pollen vaccine, was withdrawn in the mid-1970s. We report a case in which subcutaneous granulomata developed 12 years after desensitizing injections by this product.