Ann Lab Med.  2024 Nov;44(6):608-610. 10.3343/alm.2024.0167.

An Unexpected Encounter During a Screening Colonoscopy in a Medical Tourist: A Diagnosis of Hymenolepis nana Infection

• Park B
• Park HW
• Park HJ
• Won EJ
• Sung H
• Kim MN

• KMID: 2560812
• DOI: http://doi.org/10.3343/alm.2024.0167

Figure

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  Fig. 1 Morphological findings of Hymenolepis nana in a colonoscopy. (A) Colonoscopic view of H. nana infection in the cecum, revealing whitish worms approximately 2–4 cm in length. (B–E) Microscopic images of H. nana revealing proglottids ranging from immature (IM) to mature (M) with visible testes (TE), showing the progression of parasite maturation (magnification, 40×) (B), details of rectangular-shaped immature proglottids (IM) and intervening grooves, highlighting the parasite’s morphology (magnification, 400×) (C), gravid proglottids (G) filled with eggs (EG) (magnification, 100×) (D), and details of mature eggs, revealing diagnostic characteristics such as hooks (H), polar thickening (Pt), and onion-root-shaped polar filaments (Pf) (magnification, 400×) (E).

Reference

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