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Morton's Neuroma

Is It Always Symptomatic?

Jenny Bencardino1, Zehava S. Rosenberg2, Javier Beltran3, Xiang Liu4 and Emmanuelle Marty-Delfaut2

1 Department of Radiology, Massachusetts General Hospital, 15 Parkman St., Ste. 515, Boston, MA 02114.
2 Department of Radiology, Hospital for Joint Diseases-Ol, 305 E. 17th St., New York, NY 10003.
3 Department of Radiology, Maimonides Medical Center, 4802 10th Ave., Brooklyn, NY 11219.
4 Department of Radiology, Long Island Jewish Medical Center, 270-05 76th Ave., New Hyde Park, NY 11040.



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  		Fig. 1. —Drawing shows intermetatarsal nerve. Note third intermetatarsal nerve passing underneath intermetatarsal ligament.

 


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  		Fig. 2A. —35-year-old symptomatic woman with surgically proven Morton's neuroma. Oblique coronal T1-weighted MR image (TR/TE, 850/15) shows well-demarcated 10-mm hypointense soft-tissue mass (arrows) in second intermetatarsal space, extending plantarly.

 


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  		Fig. 2B. —35-year-old symptomatic woman with surgically proven Morton's neuroma. Oblique coronal T2-weighted fast spin-echo MR image (3500/100) shows areas of slightly increased signal intensity in neuroma (arrows). Note small fluid-filled intermetatarsal bursa located in first intermetatarsal space (asterisk).

 


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  		Fig. 2C. —35-year-old symptomatic woman with surgically proven Morton's neuroma. Oblique coronal gradient-echo T2*-weighted MR image (500/15; flip angle, 20°) shows homogeneous increase in signal intensity of mass (arrows) in second intermetatarsal space.

 


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  		Fig. 3A. —41-year-old woman without clinical symptoms of Morton's neuroma. Oblique coronal T1-weighted MR image (TR/TE, 900/20) (A) and oblique coronal fast spin-echo T2-weighted MR image (3500/100) (B) obtained through intermetatarsal region depict 7-mm low-signal-intensity soft-tissue mass located in third web space (arrows).

 


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  		Fig. 3B. —41-year-old woman without clinical symptoms of Morton's neuroma. Oblique coronal T1-weighted MR image (TR/TE, 900/20) (A) and oblique coronal fast spin-echo T2-weighted MR image (3500/100) (B) obtained through intermetatarsal region depict 7-mm low-signal-intensity soft-tissue mass located in third web space (arrows).

 

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