Background: Delayed reactions after facial hyaluronic acid injection are relatively rare complications. Their cause may be infectious or immune-mediated in origin, and their outbreak can be triggered, for example, by an influenza-like illness. Objective: To describe potential adverse event of influenza like illness following dermal filler injection. Methods: We report fourteen unusual cases of delayed hypersensitivity reaction to several brands of hyaluronic acid dermal filler following influenza like illness. Results: Increasing evidence implicates influenza infection in the pathogenesis of late onset filler reaction. Conclusion: Although there is a low risk of late onset adverse reaction with hyaluronic acid fillers, injecting physicians must be aware of the possible filler reaction following the influenza infection.

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Five forms of a TTD include a "hill" due to the superficial infraorbital fat pad herniation; a "valley" caused by fat reduction and skin changes; a "hill-valley" resulting from the weakening of the orbital portion of the orbicularis oculi muscle and its retaining ligaments, followed by fat reduction and skin changes; a "hill-valley-hill-valley" formed by a series of changes in portions of the orbicularis oculi muscle and its retaining ligaments; and a "mixed" form depicting a range of any of the 4 deformities. Classification of TTD is of great value to aid the treating physician in choosing the appropriate treating options.

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Steatocystoma multiplex (SM) is a rare hamartomatous malformation of the pilosebaceous duct junction. Most cases of SM are sporadic, although less common autosomal dominant inherited forms have been reported. Steatocystoma multiplex suppurativa (SMS) is a much rarer inflammatory variant of SM, associated with severe inflammatory lesions resembling those of hidradenitis suppurativa. We describe herein a 28-year-old male with SMS who presented with extensive giant cysts on his neck, face, and scalp.