A 6 month old infant with progressive failure to thrive and milestone regression is being evaluated for an inborn error of metabolism. On examination, hypotonia, apathy, deafness, hepatosplenomegaly and generalised lymphadenopathy are present. Fundus examination shows cherry red spot. A liver biopsy shows foamy hepatocytes loaded with sphingomyelin. Electron microscopy reveals zebra body. What is the diagnosis? please explain.

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Chapter22: Birds Of A Feather
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A 6 month old infant with progressive failure
to thrive and milestone regression is being
evaluated for an inborn error of metabolism.
On examination, hypotonia, apathy, deafness,
hepatosplenomegaly and generalised
lymphadenopathy are present. Fundus
examination shows cherry red spot. A liver
biopsy shows foamy hepatocytes loaded
with sphingomyelin. Electron microscopy
reveals zebra body. What is the diagnosis?
please explain.
Transcribed Image Text:A 6 month old infant with progressive failure to thrive and milestone regression is being evaluated for an inborn error of metabolism. On examination, hypotonia, apathy, deafness, hepatosplenomegaly and generalised lymphadenopathy are present. Fundus examination shows cherry red spot. A liver biopsy shows foamy hepatocytes loaded with sphingomyelin. Electron microscopy reveals zebra body. What is the diagnosis? please explain.
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