Histological and Microbiological Evaluation of Late Occurring Nodules With Hyaluronic Acid Dermal Fillers

Inclusion Criteria: * Have only received HA fillers (no limitation on the brand(s)/product(s) of HA filler used; multiple product use is allowed). * Present with an unresolved nodule (inflammatory or non-inflammatory) which was first observed \> 4 weeks and \> 2 years after most recent HA filler treatment and is determined to be greater than 3 millimeters (mm) in diameter by palpation Exclusion Criteria: * Have received non-HA fillers (e.g. polyacrylamide, calcium hydroxyapatite, poly-L-lactic acid, polymethylmethacrylate, silicone, expanded polytetrafluoroethylene, collagen) including mixes with HA fillers anywhere in the face. * Are currently enrolled in a dermal filler clinical trial or previously enrolled in a dermal filler clinical trial with randomized treatment in which the type of dermal filler is unknown (i.e. non-HA filler arm of study). * Have history of keloid or hypertrophic scarring * Have received intralesional intervention for the nodule (e.g. hyaluronidase, corticosteroids, antibiotics, 5-fluorouracil). * Are pregnant