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    Glossary Foreign Body Reaction

    body's immune response to an implanted or invasive object

    A Foreign Body Reaction (FBR) is the body's immune response to a foreign object that has entered the tissue, such as a splinter, surgical implant, or even hair transplants. This reaction involves inflammation, the formation of a fibrous capsule around the object, and the recruitment of immune cells to the site in an attempt to isolate or expel the foreign material.

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    1. Immediate Post-Operative Folliculitis: A Foreign Body Reaction, Not an Infection International Society of Hair Restoration Surgery · 2025
    2. Regenerating Hair in Prevascularized Tissue Space Formed by a Controllable Foreign Body Reaction Advanced Functional Materials · 2020 · 11 citations
    3. A case of sarcoidal foreign body reaction to permanent makeup: the involvement of M2 macrophages Journal of Cutaneous Immunology and Allergy · 2024
    4. Beyond Appearances: Foreign Body Reaction of Hair Follicles as a Complication of Inflammatory Tinea Capitis (Kerion Celsi) Resolved South Asian Research Journal of Medical Sciences · 2026
    5. Caution with Hair Dye: Foreign Body Skull Erosive Granuloma from Exogenous Hair Pigmentation Annals of the Academy of Medicine Singapore · 2020 · 3 citations
    6. Adverse cutaneous reactions to soft tissue fillers – a review of the histological features Journal of Cutaneous Pathology · 2008 · 97 citations
    7. Synthetic hair reactions and treatment of complications: Case reports Journal of Cosmetic Dermatology · 2020 · 4 citations
    8. Recurrent pseudolymphomatous reaction to ear piercing: 20-year history Pathology · 2023
    9. Fiber implantation for pattern baldness Journal of The American Academy of Dermatology · 1981 · 15 citations
    10. Post waxing folliculitis: a clinicopathological evaluation International Journal of Dermatology · 2013 · 7 citations
    11. Adhesive Depilation for Scalp Graft Hair Removal Plastic & Reconstructive Surgery · 2010 · 2 citations
    12. Case of infective endocarditis caused by implanted artificial hair pyoderma The Journal of Dermatology · 2018 · 1 citations
    13. Squamous cell carcinoma associated with a history of synthetic hair implantation: Two case reports JPRAS Open · 2024
    14. Modern artificial hair implantation: a pilot study of 10 patients Journal of Cosmetic Dermatology · 2008 · 9 citations
    15. Erythematous cutaneous nodules caused by adulterated cocaine Journal of The American Academy of Dermatology · 1989 · 5 citations
    16. Hair implant complications. PubMed · 1981 · 3 citations
    17. Ingrown Hairs: A Recurrent Trichoscopic Feature in Scarring Alopecias Skin appendage disorders · 2017 · 1 citations
    18. Complications of Self‐Injected Facial Fillers: A Treatment Conundrum in the UK Case Reports in Surgery · 2019 · 7 citations
    19. Trans-Epidermal Elimination Due to Insulin Formulation: Report of a Rare Adverse Effect Indian Dermatology Online Journal · 2025
    20. Autoimmune Hair Loss Induced by Alloantigen in C57BL/6 Mice. Cell Structure and Function · 2003 · 3 citations
    21. Side effects after artificial hair implants: 2 case reports JAAD Case Reports · 2020 · 7 citations
    22. Pseudofolliculitis barbae: Review and Update on New Treatment Modalities Military medicine · 2003 · 22 citations
    23. Eruptive Vellus Hair Cyst International Journal of Dermatology · 1986 · 8 citations
    24. Eruptive vellus hair cysts in an unusual location with atypical pathological features ˜The œKaohsiung journal of medical sciences · 2018
    25. Multiple desmoplastic trichoepitheliomas with ossification and cholesterol deposition Clinical and Experimental Dermatology · 2009 · 2 citations
    26. Squamous Cell Carcinoma of the Scalp Following Synthetic Hair Implantation: A Structured Narrative Review and the Seventh Case Reported in Literature Cureus · 2026
    27. Giant Cells in Male Pattern Alopecia: a Histologic Marker and Pathogenetic Clue Journal of Cutaneous Pathology · 1979 · 8 citations
    28. Superficial granulomatous pyoderma: A localized vegetative form of pyoderma gangrenosum Journal of The American Academy of Dermatology · 1988 · 152 citations
    29. Tick Bites. The View from Inside-Out Nova Science Publishers (Nova Science Publishers, Inc.) · 2009
    30. γδ17 T cell-stromal networks modulate matrix composition and vascularity in foreign body response 2026 · 1 citations