The correct solution is 4.
RATIONALE: Duchenne muscular dystrophy, a sex-linked disorder, causes mechanical weakening and self-destruction. The method used by the boy to stand upright is termed Gower's sign and is a common finding in this condition.
The correct solution is 4.
RATIONALE: Duchenne muscular dystrophy, a sex-linked disorder, causes mechanical weakening and self-destruction. The method used by the boy to stand upright is termed Gower's sign and is a common finding in this condition.