ArticleCureus2026
Ancient Schwannoma of the Thumb Pulp Presenting as a Cystic, Non-enhancing Lesion on MRI: A Diagnostic Pitfall.
Article in Cureus, 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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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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5 authors.
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Abstract
Schwannomas are benign peripheral nerve sheath tumors that rarely occur in the digits, with the ancient (degenerative) variant being even more uncommon. We describe the case of a 59-year-old male with a recurrent, painless thumb pulp mass. Preoperative magnetic resonance imaging (MRI) demonstrated a cystic-appearing lesion without significant postcontrast enhancement, interpreted as an epidermal inclusion cyst (EIC). Intraoperatively, the lesion was larger than expected and extended to the periosteum of the distal phalanx. Complete excision revealed a schwannoma with degenerative ("ancient") changes, confirmed by diffuse S100 and SOX10 immunoreactivity. This case provides MRI characterization of an ancient schwannoma of the thumb, demonstrating an atypical cystic, non-enhancing appearance
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