Injection Site Cyst: Formation Mechanisms, Diagnosis, and Treatment
1. Introduction An injection site cyst refers to a palpable, encapsulated nodule or fluid-filled sac that develops in the cutaneous or subcutaneous tissue following a medical puncture. The formation of these lesions represents a localized, structural tissue response to foreign material, mechanical trauma, or chemical irritation. While the term “cyst” is frequently used by patients … Read more