The Fowler-Philip angle is the angle between the inferior calcaneus and the posterior surface of the calcaneus.
It is an angle measured on the lateral view of a loaded foot; formed between 2 lines:
- a line tangent to the posterosuperior border of the calcaneus and the calcaneal tuberosity
- a line tangent to the inferior border of the calcaneus (longitudinal axis of the calcaneus), i.e. tangent to the calcaneal tubercle and processes of the calcaneal tuberosity (inferiormost point)
Its normal range is between 44° and 69°.
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- 2. Ruch JA: Haglund's disease. J Am Pocliatry,'lssoc 64(12): 1000- 1003, 1974.
- 3. Castro W, Jerosch J. Examination and Diagnosis of Musculoskeletal Disorders, History - Physical Examination - Imaging Techniques - Arthroscopy. TIS. (2001). ISBN: 3131605812