Fetal akinesia deformation sequence and neuroaxonal dystrophy without PLA2G6 mutation.
We present autopsy findings of a stillborn female infant at 20 to 21 weeks' gestation with neuroaxonal dystrophy. External examination showed features of fetal akinesia deformation sequence. Internal examination showed hypoplasia of the cerebellum, corpus callosum, and optic nerves, as well as nuclear cataracts. Light and electron microscopic examinations showed widespread axonal spheroids in the central and peripheral nervous systems. Gene sequencing failed to reveal PLA2G6 mutations, indicating that fetal neuroaxonal dystrophy presenting as fetal akinesia deformation sequence is genetically distinct from infantile neuroaxonal dystrophy and related disorders. In addition, placental examination showed α-fetoprotein-positive, eosinophilic, globular inclusions in the cytoplasm of a few villous macrophages. The significance of this novel histologic finding is unclear.
Rakheja
Dinesh
D
Department of Pathology, Children's Medical Center, Dallas, TX, USA. dinesh.rakheja@utsouthwestern.edu
Uddin
Naseem
N
Mitui
Midori
M
Cope-Yokoyama
Sandy
S
Hogan
Robert N
RN
Burns
Dennis K
DK
D002531:Cerebellum / Q000002:abnormalities; D002824:Chorionic Villi / Q000378:metabolism / Q000473:pathology; D004247:DNA / Q000235:genetics; D004252:DNA Mutational Analysis; D017809:Fatal Outcome; D005260:Female; D005315:Fetal Diseases / Q000235:genetics / Q000473:pathology*; D005865:Gestational Age; D054522:Group VI Phospholipases A2 / Q000235:genetics* / Q000378:metabolism; D006801:Humans; D002479:Inclusion Bodies; D007231:Infant, Newborn; D008264:Macrophages / Q000378:metabolism / Q000473:pathology; D009154:Mutation; D019150:Neuroaxonal Dystrophies / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D009468:Neuromuscular Diseases / Q000235:genetics / Q000378:metabolism / Q000473:pathology*; D050497:Stillbirth; D000509:alpha-Fetoproteins / Q000378:metabolism
C097353:AFP protein, human; D000509:alpha-Fetoproteins; D004247:DNA; D054522:Group VI Phospholipases A2; C516475:PLA2G6 protein, human