J Vahedian-Ardakani, Hydatid Cyst of the Liver Presenting as Cutaneous Abscesses. 1997; 17(2): 235-236 Hydatid disease is a parasitic infestation of humans and herbivorous animals, caused by Echinococcus granulosus. Dogs and some wild carnivores, like foxes, are definitive hosts, harboring worms in their intestines. Eggs are passed in feces and eaten by intermediate hosts, and larvae encyst in the liver, lungs and other organs. A man presented with two cutaneous abscesses in the right lower part of his chest wall. Further examination disclosed a hydatid cyst measuring 91x111 mm in diameter in the lower part of the right lobe of the liver, communicating with the cutaneous abscesses. The case is reported because of its unusual presentation.
Case ReportA 40-year-old male was admitted with two reddish and tender subcutaneous masses in the right lower part of his chest wall at the posterior axillary line, which had developed slowly for one month prior to admission. He is a worker, dwelling in the rural areas of Bam, a city in Kerman province, and he had close contact with cattle and dogs. The subcutaneous masses were 8x10 and 6x7 cm in diameter, respectively, and the overlying skin was thin and inflamed ( Figure 1). They were typical abscesses just about to break through the skin. Sonography disclosed an echogenic mass with echo-free areas measuring 91x111 mm in diameter in the lower part of the right lobe of the liver. Abdominal CT scan could not be performed at this time. Plain x-rays of the chest and abdomen were unremarkable. Open surgical drainage of the abscesses was attempted; they contained thick pus, whitish wrinkled cystic structures and yellowish gelatinous material.After removing the contents of the cutaneous abscess, the floor of the abscess was explored with an index finger. No obvious communication tract was found at that time. Abscess fluid was sent for routine culture, which was negative. No Gram's stain, AFB stain, anaerobic culture or culture for mycobacterium was performed. Pathologic examination identified the cystic structures as hydatid cysts with acute inflammation. A CT scan of the liver after abscess drainage revealed a large, round mass with a calcified rim in the lower part of the right hepatic lobe, having close contact with the cutaneous abscesses (Figure 2). The CT scan was characteristic of hydatid cyst of the liver. The cyst was surgically excised; it did not contain any fluid, but was filled with hundreds of daughter cysts and large amounts of a yellowish gelatinous material, amounting to one liter overall. A communicating tract was found between the liver cyst cavity and the cutaneous abscesses. The pathology report confirmed hydatid cyst of the liver.