[A case of systemic AL amyloidosis diagnosed on muscle biopsy].
Rinsho Shinkeigaku
; 60(1): 60-63, 2020 Jan 30.
Article
en Ja
| MEDLINE
| ID: mdl-31852873
ABSTRACT
A 69-year-old man was admitted to our hospital with a 1-year history of progressive easy fatigability while walking. He presented with proximal muscle weakness dominant in the lower extremities, hoarseness, and mild dysphagia. Muscle pseudo-hypertrophy was observed in the gastrocnemius. A biopsy specimen from the left deltoid muscle revealed amyloid deposition in the blood vessels and ring-like fibers. These findings suggested amyloid myopathy. The serum and urine immunofixation electrophoresis detected κ type Bence-Jones proteins, and bone marrow examination showed an increase in atypical plasma cells; thus, we established a diagnosis of multiple myeloma. Thereafter, he experienced frequent diarrhea, and the gastrointestinal endoscopy revealed extensive amyloid deposition in the upper and lower digestive tract. We started treatment with lenalidomide and dexamethasone; however, his condition worsened, and he died of aspiration pneumonia. Amyloid myopathy indicated systemic AL amyloidosis; therefore, muscle biopsy was necessary in this case.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Biopsia
/
Amiloidosis de Cadenas Ligeras de las Inmunoglobulinas
/
Músculos
Tipo de estudio:
Diagnostic_studies
Límite:
Aged
/
Humans
/
Male
Idioma:
Ja
Revista:
Rinsho Shinkeigaku
Año:
2020
Tipo del documento:
Article