Abeta Amyloidosis Iowa Type C3888309 vs 16p13 11 Microduplication Syndrome C4304595

Choose Abeta Amyloidosis Iowa Type C3888309 when

• Adult with progressive cognitive change and suspected brain hemorrhage

  This pattern fits hereditary cerebral amyloid angiopathy better than a childhood duplication syndrome.

  High

• Family history suggesting autosomal inheritance of adult neurologic disease

  Iowa type is linked to an APP mutation; targeted genetic evaluation may be considered.

  Moderate

• Imaging concern for cerebral amyloid angiopathy

  Supports clinical suspicion, but imaging alone does not establish the Iowa-type diagnosis.

  Moderate

Choose 16p13 11 Microduplication Syndrome C4304595 when

• Child with developmental delay or learning differences

  Early developmental presentation aligns with the microduplication rather than adult-onset amyloidosis.

  High

• Chromosomal microarray suggests 16p13.11 duplication

  A confirmed duplication supports this diagnosis, with clinical correlation required.

  High

• No adult hemorrhagic or progressive dementia phenotype

  Absence of that course makes Iowa-type amyloidosis less likely, though it does not prove the duplication.

  Moderate

Abeta Amyloidosis Iowa Type C3888309

Outcome

Often severe and progressive, but individual course is not fully predictable.

Factors

Neurologic progression and bleeding risk are important factors.

16p13 11 Microduplication Syndrome C4304595

Outcome

Often moderate and variable; many outcomes depend on developmental support.

Factors

Degree of developmental or learning difficulty and available interventions.