Journal List > J Korean Foot Ankle Soc > v.19(2) > 1043372

Chu, Jang, and Park: Corrective Osteotomy of Metatarsal Bone for Surgical Treatment of Morton’s Neuroma

Abstract

Purpose:

The purpose of this report is to investigate the clinical and radiological results of corrective osteotomy of the 3rd metatarsal bone for shortening and dorsal displacement without exposure around neuroma.

Materials and Methods:

Twelve cases of patients who underwent corrective osteotomy of metatarsal bone for a Morton’s neuroma from November 2013 to September 2014 were retrospectively reviewed. Corrective osteotomy was performed through a dorsal approach at the 3rd metatarsal bone base and distal metatarsal bone was displaced dorsally and proximally. Preoperative and postoperative pain assessed using American Orthopaedic Foot and Ankle Society (AOFAS) score and radiographs were evaluated.

Results:

The mean age of patients was 41.4 years, and the mean follow-up period was 10.7 months. AOFAS score improved from 52 preoperatively to 90 postoperatively. The 3rd metatarsal bone was shortened by an average of 3.39 mm and elevated by 2.38 mm.

Conclusion:

Corrective osteotomy of metatarsal bone can be regarded as a new surgical option for Morton’s neuroma without exposure around neuroma.

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Figure 1.
Widened web space by metatarsal pad.
jkfas-19-58f1.tif
Figure 2.
Method for the measurement of 3rd metatarsal length. Third metatarsal length (dashed line) was determined by measuring the distances from apex of each metatarsal to transmetatarsal line centered from lateral sesamoid and perpendicular to the second metatarsal axis.
jkfas-19-58f2.tif
Figure 3.
Metatarsal osteotomy from proximal dorsum to distal base obliquely.
jkfas-19-58f3.tif
Figure 4.
Metatarsal osteotomy was stabilized using a screw and proximal dorsal edge was cut off.
jkfas-19-58f4.tif
Figure 5.
C-arm radiographs. (A) Preoperative sesamoid view. (B) Postoperative sesamoid view (arrow). Third metatarsal bone was dorsally displaced after the metatarsal corrective osteotomy.
jkfas-19-58f5.tif
Figure 6.
(A) Preoperative foot standing anteroposterior (AP) radiograph. (B) Postoperative foot standing AP radiograph. After the metatarsal corrective osteotomy, the length of 3rd metatarsal bone was shortened.
jkfas-19-58f6.tif
Table 1.
Summary of Cases
No. Age (yr)/sex Location (web space) Third metatarsal dorsal displacement (mm) Third metatarsal length (mm) AOFAS score Foot function index
Preop Postop Preop Postop Preop Postop
1 37/M 2nd, 3rd 1.99 7.16 2.92 52 90 50 12
2 58/F 2nd, 3rd 2.23 13.65 10.69 52 90 130 35
3 52/F 2nd, 3rd 2.67 12.36 10.57 59 90 86 2
4 48/M 2nd 2.50 11.81 8.38 48 90 149 41
5 25/M 3rd 2.58 8.38 5.74 44 80 166 77
6 47/M 2nd, 3rd 2.38 11.94 9.18 50 87 159 46
7 47/M 2nd, 3rd 2.53 13.33 8.88 50 87 159 46
8 39/M 2nd, 3rd 1.90 15.20 11.54 44 90 168 45
9 37/F 2nd 2.62 10.20 5.64 62 100 144 18
10 36/M 2nd, 3rd 2.72 17.03 13.57 62 100 140 39
11 37/F 2nd, 3rd 2.35 7.65 4.31 52 82 51 25
12 39/M 2nd, 3rd 2.16 11.33 7.99 50 90 105 49

M: male, F: female, AOFAS: American Orthopaedic Foot and Ankle Society, Preop: preoperative, Postop: postoperative.

Table 2.
Functional and Radiologic Results
Evaluated data Preoperative Postoperative Difference p-value
AOFAS score 52.08±6.07 89.67±5.88 37.58±4.27 0.005
Third metatarsal length (mm) 11.67±2.99 8.28±3.15 3.39±0.80 0.000
Third metatarsal dorsal displacement (mm) 0 2.38±0.27 2.38±0.27 0.000
Foot function index 125.58±42.69 36.25±19.87 89.33±32.89 0.017

Values are presented as mean±standard deviation. AOFAS: American Orthopaedic Foot and Ankle Society.

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