A 9-month-old girl has been increasingly noted to hold her arms and legs out straight, with occasional crossing-over of the legs at the ankles. She does not sit unsupported, nor does she roll over effectively. She was born 12 weeks premature and was very ill during the neonatal period.

What can be the diagnosis? *This case is from the Editorial team of Docplexus and is meant for educative purposes only. The answer is posted in the comment section below!