Pes cavus refers to a descriptive term for a type of foot deformity with an abnormally high longitudinal arch of the foot (caved in foot).
It can be associated with certain neuromuscular disorders such as
- Charcot-Marie-Tooth disease : considered one of the commonest associations in the western world 4, 6
- conditions that cause spastic paralysis
- spinal anomalies
A lateral view is the key to assessment as the dorso-plantar view can sometimes be normal unless there an associated abnormality 2.
On a lateral view there is:
- increase in the calcaneal inclination angle
- angle of the longitudinal arch less than 150 degrees
- the mid-talar axis either extends above the 1st metatarsal or intersects the shaft distal to its midpoint
- Hibb's angle less than 150 degrees.
Foot alignment abnormalities
- 1. Castro WH, Jerosch J, Grossman TW. Examination and Diagnosis of Musculoskeletal Disorders, Clinical Examination, Imaging Modalities. George Thieme Verlag. (2001) ISBN:1588900320. Read it at Google Books - Find it at Amazon
- 2. Burgener FA, Kormano M, Pudas T. Differential Diagnosis in Conventional Radiology. Thieme Medical Pub. (2007) ISBN:1588902757. Read it at Google Books - Find it at Amazon
- 3. Yochum TR, Rowe LJ. Essentials of Skeletal Radiology. (2005) ISBN:0781739462. Read it at Google Books - Find it at Amazon
- 4. Kulkarni G. Textbook of Orthopaedics and Trauma. Jaypee Brothers Medical Pub. (2009) ISBN:8184482426. Read it at Google Books - Find it at Amazon
- 5. Price AE, Maisel R, Drennan JC. Computed tomographic analysis of pes cavus. J Pediatr Orthop. 13 (5): 646-53. - Pubmed citation
- 6. Burns J, Ouvrier R. Pes cavus pathogenesis in Charcot-Marie-Tooth disease type 1A. Brain. 2006;129 (Pt): E50. doi:10.1093/brain/awl116 - Pubmed citation