D2I2.
congenital

Sprengel's deformity

Sprengel's deformity is a rare abnormality where a person has one shoulder blade that sits higher on the back than the other. The deformity is due to a failure in early fetal development, where the shoulder fails to descend properly from the neck to its final position. The majority of cases are sporadic, with very few having inheritance.

Underlined words are explained — tap any of them.

Plain-language summary adapted from Wikipedia. Not medical advice.