Abnormal striae (striae distensae) may be a finding associated with Marfan syndrome. To support the diagnosis of Marfan syndrome these striae must meet a number of criteria.

The striae may be located in an uncommon location:

(1) midback or lumbar region

(2) thigh

(3) upper arm and/or axillary region


The diagnosis requires exclusion of other causes of striae:

(1) marked change in weight

(2) pregnancy

(3) Cushing syndrome

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