Skin biopsy in Lafora disease: genotype-phenotype correlations and diagnostic pitfalls.
Lafora disease is characterized by pathognomonic inclusions, Lafora bodies (LB), in neurons and other cell types. In skin, LB have been reported in either eccrine sweat glands or in apocrine sweat glands. The disease is caused by mutations in either the EPM2A gene or in a second yet-unknown gene. Here the authors determine whether a genotype-phenotype correlation exists between the genetic form of the disease and the skin cell type affected by LB formation. Also is described an important source of false positivity in the use of axillary biopsies for disease diagnosis.
Andrade
D M
DM
Program in Genetics and Genomic Biology, Research Institute, Hospital for Sick Children and University of Toronto, Ontario, Canada.
Ackerley
C A
CA
Minett
T S C
TS
Teive
H A G
HA
Bohlega
S
S
Scherer
S W
SW
Minassian
B A
BA
D000293:Adolescent; D002648:Child; D005189:False Positive Reactions; D005260:Female; D005838:Genotype; D006801:Humans; D020192:Lafora Disease / Q000175:diagnosis* / Q000235:genetics / Q000473:pathology; D010375:Pedigree; D010641:Phenotype; D017027:Protein Tyrosine Phosphatases / Q000235:genetics; D054558:Protein Tyrosine Phosphatases, Non-Receptor; D012867:Skin / Q000166:cytology / Q000473:pathology*
D017027:Protein Tyrosine Phosphatases; D054558:Protein Tyrosine Phosphatases, Non-Receptor; C114990:EPM2A protein, human