Hydatid cysts (echinococcosis) are caused by an infestation with larval tapeworms of the genus Echinococcus. The disease is extensively distributed worldwide, and it has been rarely reported in Korea. We describe the cytologic features of a case of hepatic hydatid cyst in a 28-year-old male. Computed tomography revealed a cystic mass in the right lobe of the liver. A right hemihepatectomy was performed. The aspirated fluid from the hepatic cystic mass was clear. The smears showed protoscolices, hooklets, and a laminated membrane.

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• A rare case of hydatid cyst of the neck with concurrent pulmonary hydatid disease
  Amarendra Kumar Shukla, Amrutha Peter, Veerendra Arya, Vineet Dwivedi, Manish Kumar Gupta, Nimish Rai, Pawan Tiwari, Jitendra Kishore Bhargava
  Journal of Parasitic Diseases.2022; 46(4): 941.     CrossRef
• Hepatic Hydatid Cyst: A Case Report
  Wan Chul Kim, Jae Uk Shin, Su Sin Jin
  The Korean Journal of Gastroenterology.2021; 77(1): 35.     CrossRef
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  Dong Hoon Shin, Hae Chan Jo, Jeong-Han Kim, Kang Il Jun, Wan Beom Park, Nam-Joong Kim, Min-Ho Choi, Chang Kyung Kang, Myoung-don Oh
  The Korean Journal of Parasitology.2019; 57(4): 429.     CrossRef
• Cytology of hydatid cyst mimicking intra-abdominal sarcoma, diagnosed by fine-needle aspiration
  Busra Ozbek, Nadir Paksoy
  Diagnostic Cytopathology.2018; 46(4): 362.     CrossRef
• Clinical Update on Parasitic Diseases
  Min Seo
  Korean Journal of Medicine.2013; 85(5): 469.     CrossRef

Soft tissue myoepithelioma is a rare neoplasm composed of myoepithelial cells. Here, we describe the cytologic features of soft tissue myoepithelioma arising on the right forearm in an 18-year-old man. The excised tumor (3.0×1.8×1.5 cm) was well-demarcated, yellow-gray, soft, and myxoid. The cytologic smears showed round to spindle, epithelioid, and plasmacytoid cells in the myxoid background. The nuclei were uniform, round to ovoid, with finely distributed chromatin and eosinophilic or pale cytoplasm. The tumor cells demonstrated immunoreactivity for cytokeratin (AE1/AE3), epithelial membrane antigen, S100 protein, and glial fibrillary acidic protein. Electron microscopy showed intermediate filaments, desmosomes, and basal lamina.

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• Fine-needle aspiration cytopathology of soft tissue myoepithelioma: an analysis of seven cases
  Paul E. Wakely, Momin T. Siddiqui
  Journal of the American Society of Cytopathology.2022; 11(1): 31.     CrossRef
• Cytology‐histology correlation of myoepithelial tumors harboring EWSR1‐POU5F1 fusions: A report of two cases
  Ian A. Gelarden, Lucy Fu, Kai Lee Yap, Aida I. Richardson, Pauline M. Chou
  Diagnostic Cytopathology.2022;[Epub]     CrossRef
• A case of myoepithelial carcinoma of the left shoulder
  Shuhei ISHII, Noriyuki FURUTA, Kyoko KOMATSU, Yoshiya SUGIURA, Noriko MOTOI, Yutaka TAKAZAWA, Yuko SUGIYAMA, Yuichi ISHIKAWA
  The Journal of the Japanese Society of Clinical Cytology.2018; 57(2): 129.     CrossRef
• Fine-needle aspiration of soft tissue myoepithelioma
  Gang Wang, Tracy Tucker, Tony L. Ng, Carlos F. Villamil, Malcolm M. Hayes
  Diagnostic Cytopathology.2016; 44(2): 152.     CrossRef
• A case report of spindle cell myoepithelioma with extensive lipomatous metaplasia and thick collagen bundles in the submandibular gland
  Mi Jung Kwon, Hye Jeong Kim, Bumjung Park, Seong Jin Cho, Hyung Sik Shin, Hye-Rim Park, Soo Kee Min, Jinwon Seo, Kyueng-Whan Min, Eun Sook Nam
  Diagnostic Cytopathology.2016; 44(9): 764.     CrossRef
• Myoepithelioma of soft tissue, a case report
  Hassania Ameurtesse, Leila Chbani, JM Coindre, Hinde Elfatemi, Toufik Harmouch, Afaf Amarti
  Research.2014;[Epub]     CrossRef