What is the role of imaging studies in the evaluation of interdigital neuritis?

Updated: Oct 15, 2019
  • Author: Minoo Hadjari Hollis, MD; Chief Editor: Thomas M DeBerardino, MD  more...
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Zanetti et al studied 54 feet in which interdigital neuritis was suspected in order to determine the effect of MRI results on diagnostic thinking and the therapeutic decisions made by orthopedic surgeons. [47] The authors noted considerable change in the diagnosis, location, and number of neuromas, as well as in the treatment plans, after MRI.

In another report, Zanetti et al suggested that diagnosis of interdigital neuritis on the basis of MRI results is relevant only when the transverse diameter of the fluid collection in the bursa is 5 mm or more and when the MRI results are correlated with the clinical findings. [48] Fluid collections in the first three metatarsal bursae with a transverse diameter of 3 mm or less are probably physiologic.

In a histomorphologic study of patients and autopsies, Morscher et al concluded that diagnostic MRI or ultrasonography is unnecessary for making decisions about operative treatment. [35] In addition, Resch et al found that MRI modalities had little or no value in the diagnosis of interdigital neuritis, because of the high rate of false-negative results. [49]

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