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| ====== Papillary vs. Follicular Conjunctivitis ====== | ====== Papillary vs. Follicular Conjunctivitis ====== |
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| Papillary and follicular conjunctivitis are not diseases in themselves — they are two distinct conjunctival reaction patterns, distinguished by histology, morphology, and differing etiologic associations. Recognizing which pattern predominates on eyelid eversion helps narrow the differential quickly. | |
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| ===== Papillary Reaction ===== | ===== Papillary Reaction ===== |
| ===== Causes by Reaction Pattern ===== | ===== Causes by Reaction Pattern ===== |
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| ^ Reaction Pattern ^ Category ^ Specific Causes ^ | ^ Category ^ Reaction Pattern ^ Specific Causes ^ |
| | Papillary | Allergic | Seasonal/perennial allergic conjunctivitis, vernal keratoconjunctivitis, atopic keratoconjunctivitis | | | Allergic | Papillary | Seasonal/perennial allergic conjunctivitis, vernal keratoconjunctivitis, atopic keratoconjunctivitis | |
| | Papillary | Mechanical/Immunologic | Giant papillary/contact lens–induced conjunctivitis (lens deposits), ocular prosthesis, exposed sutures | | | Mechanical/Immunologic | Papillary | Giant papillary/contact lens–induced conjunctivitis (lens deposits), ocular prosthesis, exposed sutures | |
| | Papillary | Infectious | Chronic bacterial conjunctivitis (S. aureus, S. pneumoniae, H. influenzae, Moraxella) | | | Infectious | Papillary | Chronic bacterial conjunctivitis (S. aureus, S. pneumoniae, H. influenzae, Moraxella) | |
| | Follicular | Viral | Adenovirus (EKC, pharyngoconjunctival fever, nonspecific follicular conjunctivitis), other viruses | | | Viral | Follicular | Adenovirus (EKC, pharyngoconjunctival fever, nonspecific follicular conjunctivitis), other viruses | |
| | Follicular | Chlamydial | Inclusion conjunctivitis (C. trachomatis D–K), trachoma (serotypes A–C) | | | Chlamydial | Follicular | Inclusion conjunctivitis (C. trachomatis D–K), trachoma (serotypes A–C) | |
| | Follicular | Toxic/Medicamentosa | Chronic topical medication toxicity (e.g., antivirals, glaucoma drops, preservatives) | | | Toxic/Medicamentosa | Follicular | Chronic topical medication toxicity (e.g., antivirals, glaucoma drops, preservatives) | |
| | Follicular | Granulomatous | Parinaud oculoglandular syndrome (Bartonella henselae, tularemia, sporotrichosis) | | | Granulomatous | Follicular | Parinaud oculoglandular syndrome (Bartonella henselae, tularemia, sporotrichosis) | |
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| ===== Clinical Bottom Line ===== | ===== Clinical crossover ===== |
| | Some conditions produce a mixed picture — trachoma, for example, classically shows follicles but develops an intense papillary component when inflammation is florid. |
| A papillary reaction points toward allergic, mechanical/contact lens, or chronic bacterial etiologies (itching, mucoid discharge), whereas a follicular reaction points toward viral, chlamydial, or toxic etiologies (watery discharge, preauricular node). Some conditions produce a mixed picture — trachoma, for example, classically shows follicles but develops an intense papillary component when inflammation is florid. | |
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| ===== References ===== | ===== References ===== |
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| - Kenny SE, Tye CB, Johnson DA, Kheirkhah A. Giant Papillary Conjunctivitis: A Review. //The Ocular Surface.// 2020;18(3):396-402. doi:10.1016/j.jtos.2020.03.007. | - [[https://pubmed.ncbi.nlm.nih.gov/32339665/|Kenny SE, Tye CB, Johnson DA, Kheirkhah A. Giant Papillary Conjunctivitis: A Review. The Ocular Surface. 2020;18(3):396-402]] |
| - Buckley RJ. Allergic eye disease – a clinical challenge. //Clinical and Experimental Allergy.// 1998;28 Suppl 6:39-43. doi:10.1046/j.1365-2222.1998.0280s6039.x. | - [[https://pubmed.ncbi.nlm.nih.gov/9988434/|Buckley RJ. Allergic eye disease – a clinical challenge. Clinical and Experimental Allergy. 1998;28 Suppl 6:39-43]] |
| - Solomon A. Allergic Manifestations of Contact Lens Wearing. //Current Opinion in Allergy and Clinical Immunology.// 2016;16(5):492-7. doi:10.1097/ACI.0000000000000311. | - [[https://pubmed.ncbi.nlm.nih.gov/27518840/|Solomon A. Allergic Manifestations of Contact Lens Wearing. Current Opinion in Allergy and Clinical Immunology. 2016;16(5):492-7]] |
| - American Academy of Ophthalmology. Conjunctivitis. AAO, 2024. | - [[https://www.aao.org/education/preferred-practice-pattern/conjunctivitis-ppp-2023|American Academy of Ophthalmology. Conjunctivitis. AAO, 2024]] |
| - Kim SE, Nowak V, Quartilho A, et al. Systemic Interventions for Severe Atopic and Vernal Keratoconjunctivitis in Children and Young People Up to the Age of 16 Years. //Cochrane Database of Systematic Reviews.// 2020;10:CD013298. doi:10.1002/14651858.CD013298.pub2. | - [[https://pubmed.ncbi.nlm.nih.gov/33084033/|Kim SE, Nowak V, Quartilho A, et al. Systemic Interventions for Severe Atopic and Vernal Keratoconjunctivitis in Children and Young People Up to the Age of 16 Years. Cochrane Database of Systematic Reviews.2020;10:CD013298]] |
| - Durand ML, Barshak MB, Sobrin L. Eye Infections. //NEJM.// 2023;389(25):2363-2375. doi:10.1056/NEJMra2216081. | - [[https://pubmed.ncbi.nlm.nih.gov/40412861/|Habtamu E, Harding-Esch EM, Greenland K, et al. Trachoma. Lancet. 2025;405(10492):1865-1878]] |
| - Habtamu E, Harding-Esch EM, Greenland K, et al. Trachoma. //Lancet.// 2025;405(10492):1865-1878. doi:10.1016/S0140-6736(25)00551-3. | - [[https://pubmed.ncbi.nlm.nih.gov/23797960/|Newman H, Gooding C. Viral ocular manifestations: a broad overview. Reviews in Medical Virology. 2013;23(5):281-94]] |
| - Newman H, Gooding C. Viral ocular manifestations: a broad overview. //Reviews in Medical Virology.// 2013;23(5):281-94. doi:10.1002/rmv.1749. | - [[https://pubmed.ncbi.nlm.nih.gov/26077630/|Jhanji V, Chan TC, Li EY, Agarwal K, Vajpayee RB. Adenoviral Keratoconjunctivitis. Survey of Ophthalmology. 2015 Sep-Oct;60(5):435-43]] |
| - Jhanji V, Chan TC, Li EY, Agarwal K, Vajpayee RB. Adenoviral Keratoconjunctivitis. //Survey of Ophthalmology.// 2015 Sep-Oct;60(5):435-43. doi:10.1016/j.survophthal.2015.04.001. | - [[https://pubmed.ncbi.nlm.nih.gov/34136960/|Mueller A. Allergic Conjunctivitis: An Update. Handbook of Experimental Pharmacology. 2022;268:95-99]] |
| - Mueller A. Allergic Conjunctivitis: An Update. //Handbook of Experimental Pharmacology.// 2022;268:95-99. doi:10.1007/164_2021_491. | - [[https://pubmed.ncbi.nlm.nih.gov/38127333/|Morales-Mancillas NR, Velazquez-Valenzuela F, Kinoshita S, et al. Definition and Diagnostic Criteria for Pediatric Blepharokeratoconjunctivitis. JAMA Ophthalmology. 2024;142(1):39-47]] |
| - Morales-Mancillas NR, Velazquez-Valenzuela F, Kinoshita S, et al. Definition and Diagnostic Criteria for Pediatric Blepharokeratoconjunctivitis. //JAMA Ophthalmology.// 2024;142(1):39-47. doi:10.1001/jamaophthalmol.2023.5750. | |