Forefoot width and Morton's Neuroma

NewsBot · Mar 3, 2017

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The role of the width of the forefoot in the development of Morton's neuroma.
Park YH et al
Bone Joint J. 2017 Mar;99-B(3):365-368. doi: 10.1302/0301-620X.99B3.BJJ-2016-0661.R1.

AIMS:
Morton's neuroma is common condition of the forefoot, but its aetiology remains unclear. Our aim was to evaluate the relationship between the width of the forefoot and the development of a Morton's neuroma.
PATIENTS AND METHODS:
Between January 2013 and May 2016, a total of 84 consecutive patients (17 men, 67 women) with a unilateral Morton's neuroma were enrolled into the study. The involved and uninvolved feet of each patient were compared. A control group of patients with symptoms from the foot, but without a neuroma who were matched for age, gender, affected side, and web space location, were enrolled. The first to fifth intermetatarsal distance, intermetatarsal angle and intermetatarsal distance of involved web space on standing radiographs were assessed.
RESULTS:
The inter- and intra-observer reliability was excellent. The three parameters did not differ significantly between the involved and uninvolved feet. Neither did they differ significantly between the patients and the controls.
CONCLUSION:
We conclude that there is no significant relationship between the width of the forefoot and the development of a Morton's neuroma.
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Admin2 · Mar 3, 2017

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NewsBot · Jun 8, 2022

Study of the Anatomical Association between Morton’s Neuroma and the Space Inferior to the Deep Transverse Metatarsal Ligament Using Ultrasound
María del Mar Ruiz-Herrera et al
Diagnostics 2022, 12(6), 1367; https://doi.org/10.3390/diagnostics12061367

Morton’s neuroma (MN) is a common condition in clinical practice. The compressive etiology is the most accepted, in which compression occurs in the tunnel formed by the adjacent metatarsals, the deep transverse metatarsal ligament (DTML) and the plantar skin. Ultrasound (US) is a reliable method of study. The presence of insufficient space under the DTML may be related to the appearance of MN. Objectives: To verify the relationship between MN and the space under the DTML between the metatarsal heads of the third (M3) and the fourth (M4) metatarsals using US. Methods: This is a cross-sectional epidemiological study. The research study using the ultrasound (US) technique was carried out on 200 feet belonging to 100 patients aged 18 to 65 of both sexes, with a control group formed by 62 patients and a study group formed by 38 patients diagnosed with MN. Results: The presence of MN and the factors associated with it were studied in 100 patients using ultrasound (US). The assessment and comparison with US of the space inferior to the DTML between M3 and M4 in control groups and patients with MN show that patients with MN have a smaller size in the variable “h” (height or distance DTML-plantar skin), in the variable “b” (base or intermetatarsal distance M3 and M4) and in the variable “s” (surface of the parallelogram “h” × “b”). The predictors of MN are a decrease in dimension “b” and an increase in weight. Sitting in an office chair and the use of a bicycle, due to equinus, have an influence on the space below the DTML, reducing it and promoting the appearance of MN. Conclusions: The two US measurements (“h” and “b”) in the space below the DTML are smaller in patients with MN than in the asymptomatic group. A shorter distance between M3 and M4, and an increase in BMI are predictors of MN.
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