Human sparganosis in Italy. Case report and review of the European cases

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Abstract

Infections with Spargana, the larvae of Spirometra spp., are rarely found in humans in Europe. So far only six cases have been discussed in the literature, four from Italy and two from France. We here report a new case in a 50-year-old workman, a freshwater sports fisherman from Bologna in Northern Italy. The infection manifested as a subcutaneous nodule in the thigh, 2x3 cm in size, slightly painful when compressed, somewhat mobile under the skin, present for 9 months, with recurrent periods of local itchiness associated with redness and slight oedema. The lump was removed surgically. Histological sections of the biopsied material revealed the presence of a sparganum. Drinking water contaminated by copepods, containing procercoid larvae of this parasite, seems to be the medium of infection.

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Entozoorum synopsis cui accedunt mantissa duplex et indices locupletissimi / auctore, Carolo Asmund Rudolphi.

Karl Rudolphi (1819)

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Subcutaneous and musculoskeletal sparganosis: imaging characteristics and pathologic correlation.

B. Lee, Eric Suh, H. Park … (2000)

To document the imaging characteristics of subcutaneous and musculoskeletal sparganosis. Ten patients with musculoskeletal sparganosis were examined, with a variety of imaging modalities including MRI (n=6), ultrasonography (n=8), plain radiography (n=7) and CT (n=1). Pathologic correlation was carried out in all cases. Nine lesions involved soft tissues, of which seven were in the thigh, two in the trunk and one involved a vertebral body. The majority of the lesions in soft tissue were confined to the subcutaneous layer but two extended deep into underlying muscles. Sonography revealed low-echoic serpiginous tubular tracts (8/8), and an intraluminal echogenic structure (4/8). MRI revealed multiple serpiginous tubular tracts and peripheral rim enhancement. Two patients showed perilesional soft tissue edema. Pathologically, the lesion consisted of a larva surrounded by three layers of inflammation: an inner epithelioid granulomatous cell layer, middle chronic inflammatory cell layers, and an outer fibrous layer. The study suggests that if serpiginous tubular tracts are seen at imaging studies, musculoskeletal sparganosis should be included in the differential diagnosis.