This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculoskeletal Radiology, Subject name: Radiology
Erlen Meyer Flask Deformity is seen in? 
Select and explain. 
A. Osteopetrosis, B. Thalassemia, C. Craniometaphyseal dysplasias, D. All
D: All
Answer: D: All 
Explanation: Mnemonics for Erlen Meyer Flask Deformity (CHONG) C: craniometaphyseal dysplasias/Pyles disease H: haemoglobinopathies thalassemia sickle cell disease O: osteopetrosis N: Niemann-Pick disease G: Gaucher disease Radiographs showed a nondisplaced fracture and undeubulation of the distal femoral diaphysis -- a condition known as Erlenmeyer-flask deformity.