This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal System, Subject name: Radiology
Tufting of distal phalanx is characteristically seen in? 
Select and explain. 
A. Gout, B. Psoriatic arthrophathy, C. Hypoparathyroidism, D. Paget's disease
B: Psoriatic arthrophathy
Answer: B: Psoriatic arthrophathy 
Explanation: Ans BTufting of distal phalynx is acroosteolysis caused heterogeneous group of pathological entities:Causes: (Remember as Mnemonic: PINCH OF Extremity- as it is almost as if the tip of the extremity is pinched off/resorbed)* Pyknodysostosis* Infection-Leprosy* Injury-Frostbite/electric injury* Neuropathic-Tabes dorsalls, Syringomyella, Diabetes* Cleidocranial dysplasia* Hyperparathyroidism* Other- Sarcoidosis, Kaposi's, Psoriasis* Familial disorders* Ergot poisoning