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Amyloidomas cutáneos tipo AL como una variante del linfoma cutáneo primario de la zona marginal: una serie de 30
Sergio García-González1, Mar García-García2,3, Clara Miguel Miguel4
1Dermatology Department, Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain.
The American Journal of dermatopathology
|September 4, 2025
Resumen
Los amiloidomas cutáneos AL, vinculados a las cadenas ligeras de inmunoglobulinas, son lesiones cutáneas indolentes. Pueden ser una variante del linfoma cutáneo marginal primario con un pronóstico favorable.
Área de la Ciencia:
- Dermatología
- Hematología
- En el campo de la oncología
Sus antecedentes:
- Los amiloidomas cutáneos AL plantean desafíos de diagnóstico, que a menudo surgen de las cadenas ligeras de inmunoglobulina debido a la proliferación de las células plasmáticas.
- Se debate la relación entre los amiloidomas AL y el linfoma de la zona marginal cutánea primaria.
Objetivo del estudio:
- Investigar las características clínicas, histopatológicas y moleculares de los amiloidomas cutáneos AL.
- Para aclarar la naturaleza y la clasificación potencial de estas lesiones.
Principales métodos:
- Estudio observacional retrospectivo y multicéntrico en 30 pacientes con amiloidomas AL.
- Revisión de los datos demográficos, clínicos e histopatológicos.
- Utilizó restricción de cadena ligera, inmunohistoquímica, PCR y secuenciación de próxima generación.
Principales resultados:
- Edad media 64,7 años; las presentaciones comunes fueron placas/ nódulos en las extremidades/ cara.
- La histopatología mostró infiltraciones de células plasmáticas monoclonales y depósitos amiloides; la mayoría tenía restricción de la cadena ligera lambda.
- No se observó progresión a enfermedad sistémica; el síndrome de Sjögren fue una comorbilidad común.
Conclusiones:
- Los AL-amiloidomas cutáneos son lesiones indolentes con un pronóstico favorable.
- Estas lesiones pueden representar una variante del linfoma cutáneo marginal primario o de los linfomas indolentes de células B.
- La deposición de amiloides es una característica clave, con un riesgo mínimo de progresión sistémica.
Palabras clave:
Amiloide y sus derivadosAl-amiloidoma cutáneohistopatologíalinfoma cutáneo primario de la zona marginalla pielMás Videos Relacionados
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