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Primary gelatinous drop-like corneal dystrophy in a white woman. A pathologic, ultrastructural, and immunohistochemical study

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Název: Primary gelatinous drop-like corneal dystrophy in a white woman. A pathologic, ultrastructural, and immunohistochemical study
Autoři: Buchi, E. R., Daicker, B., Uffer, S., Gudat, F.
Rok vydání: 2025
Sbírka: Université de Lausanne (UNIL): Serval - Serveur académique lausannois
Témata: Adult Amyloidosis/*pathology Corneal Diseases/*pathology Corneal Dystrophies, Hereditary/*pathology Female Follow-Up Studies Humans Keratoplasty, Penetrating Longitudinal Studies Reoperation
Popis: A white female with primary gelatinous drop-like corneal dystrophy (PGDD) was followed from the ages of 8 to 37 years. During this time, she underwent repeated lamellar and penetrating keratoplasties on both sides due to relapsing bilateral corneal opacifications. The diagnosis of PGDD was based on the histology of the corneal specimens obtained at 10 and 36 years of age, as well as on the characteristic clinical appearance and course. Electron microscopy showed typical amyloid fibrils. Immunohistochemical staining was mildly positive for amyloid AL (light chain), but negative for amyloid AA, AF, AB, and keratin. Thus, the precursor protein of the amyloid deposits in PGDD might derive from immunoglobulins, e.g., from the tear film. However, the precursor protein might derive from a different origin altogether. In that case, the positive staining for amyloid AL would translate nonspecific absorption of fragments of light chains.
Druh dokumentu: article in journal/newspaper
Jazyk: unknown
ISSN: 0277-3740
Relation: Cornea: The Journal of Cornea and External Disease; https://iris.unil.ch/handle/iris/125925; serval:BIB_16D7F0EC2001; A1994MY12900014; 8156793
Dostupnost: https://iris.unil.ch/handle/iris/125925
Přístupové číslo: edsbas.3B5E880
Databáze: BASE
Popis
Abstrakt:A white female with primary gelatinous drop-like corneal dystrophy (PGDD) was followed from the ages of 8 to 37 years. During this time, she underwent repeated lamellar and penetrating keratoplasties on both sides due to relapsing bilateral corneal opacifications. The diagnosis of PGDD was based on the histology of the corneal specimens obtained at 10 and 36 years of age, as well as on the characteristic clinical appearance and course. Electron microscopy showed typical amyloid fibrils. Immunohistochemical staining was mildly positive for amyloid AL (light chain), but negative for amyloid AA, AF, AB, and keratin. Thus, the precursor protein of the amyloid deposits in PGDD might derive from immunoglobulins, e.g., from the tear film. However, the precursor protein might derive from a different origin altogether. In that case, the positive staining for amyloid AL would translate nonspecific absorption of fragments of light chains.
ISSN:02773740