“…54 It is recognized that the degree to which HR develops depends on many factors. 31 On the basis of empirical observations of the etiology of HR, authors have proposed several systems to stratify the severity of HR including two grades, 18,28,41 three grades, 2,9,14,17,22,23,26,38,43,47 four grades, 13,19,34,46,50,52,53 and five grades. 11,27 These have been based predominantly on radiological and/or clinical features combined to grade the degree of first MTP joint osteoarthritis.…”