ArticleJournal of ultrasound2026
Apocrine hydroadenoma mimicking a Morton's neuroma: a rare differential diagnosis.
Article in Journal of ultrasound, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
A 62-year-old woman, with neuropathic pain and paresthesia in her right forefoot, showed a circumscribed soft tissue swelling on the sole between the second and third metatarsal. Ultrasound (US) imaging showed a well-defined lesion in the second intermetatarsal space, without vascularization sign at Power Doppler (PD). In the first hypothesis, these findings led to Morton's neuroma. Magnetic Resonance Imaging (MRI), demonstrated a dumbbell-shaped lesion between the II and the III metatarsal heads; it extended cranially to the subcutaneous fat of the dorsal slope. The MRI findings weren't compatible with a classic Morton's neuroma and were radiologically undetectable. The patient had a sub-total excisional biopsy. The anatomopathological features were specific to an apocrine hydroadenoma from an ectopic sweat gland. This rare pathology has not been previously described in the literature and it must be considered as a differential diagnosis due to the clinical presentation and the US appearance mimicking Morton's neuroma.
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