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<p>Unusual manifestations of <i>Dracunculus</i> infection pose diagnostic challenges, particularly in non-endemic regions. This study reports a descriptive clinical and parasitological investigation of an atypical tumor-like presentation of human dracunculiasis in Vietnam. Clinical, imaging, and parasitological examinations were performed on a patient with an ivory-white cyst initially suspected to be a soft-tissue tumor. The parasite was extracted and identified based on its morphological and molecular features. The active movement of the worm was documented using video recordings. A live nematode was detected within a cyst lesion and identified as <i>Dracunculus</i> sp. based on 18&#xa0;S rDNA sequence data. To our knowledge, this represents the first documented tumor-like presentation of human dracunculiasis in Vietnam, supported by live visual documentation. This study highlights an atypical manifestation of dracunculiasis that can mimic a soft tissue tumor. Recognition of such atypical presentations is critical for accurate diagnosis and effective management, particularly in regions where Dracunculus infection is rare and may be asymptomatic.</p>

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Unusual subcutaneous tumor caused by Dracunculus sp. in Vietnam: integrated clinical, parasitological, imaging, and molecular evidence

  • 期刊论文

  • 发表日期：

    2026年1月27日

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  • Thi Hai Nguyen,
  • Thi Hong Anh Vu,
  • Thi Thu Trang Nguyen,
  • Ngoc Anh Do

摘要

Unusual manifestations of Dracunculus infection pose diagnostic challenges, particularly in non-endemic regions. This study reports a descriptive clinical and parasitological investigation of an atypical tumor-like presentation of human dracunculiasis in Vietnam. Clinical, imaging, and parasitological examinations were performed on a patient with an ivory-white cyst initially suspected to be a soft-tissue tumor. The parasite was extracted and identified based on its morphological and molecular features. The active movement of the worm was documented using video recordings. A live nematode was detected within a cyst lesion and identified as Dracunculus sp. based on 18 S rDNA sequence data. To our knowledge, this represents the first documented tumor-like presentation of human dracunculiasis in Vietnam, supported by live visual documentation. This study highlights an atypical manifestation of dracunculiasis that can mimic a soft tissue tumor. Recognition of such atypical presentations is critical for accurate diagnosis and effective management, particularly in regions where Dracunculus infection is rare and may be asymptomatic.