• Journal of the Korean Society of Radiology
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• v.81 no.2
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• pp.448-452
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• 2020

Clear cell hidradenoma is a tumor that originates from a sweat gland and typically involves the dermis and subcutaneous tissue. Malignant clear cell hidradenoma is very rare, and surgical excision is usually performed without imaging. There are few reports of the ultrasonographic findings of malignant clear cell hidradenomas. Herein, we present the ultrasonographic characteristics of a malignant clear cell hidradenoma.

• Korean Journal of Head & Neck Oncology
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• v.36 no.2
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• pp.41-44
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• 2020

Clear cell hidradenoma is a skin adnexal tumor originating from eccrine glands. The risk of local recurrence after surgical resection exceeds 50%, and 6-19% of cases are malignant. The rarity of clear cell hidradenoma and its diverse histological findings make this type of tumor a diagnostic challenge. We present a case of recurrent clear cell hidradenoma of the posterior neck in a 70-year-old woman. The tumor recurred once after complete excision, and did not recur again after 1-cm wide excision and reconstruction with a local bilobed flap. Recurrent clear cell hidradenomas are activated by surgical stimulation, increasing the risk for metastasis. Therefore, we suggest that wide excision with confirmation of a tumor-free margin by frozen-section biopsy should be the first-line treatment for recurrent benign clear cell hidradenoma.

• Archives of Plastic Surgery
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• v.34 no.4
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• pp.512-515
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• 2007

Purpose: Clear cell hidradenoma, now regarded as an eccrine sweat gland tumor on the basis of its enzyme histochemical and electron microscopic features, occurs as a solitary tumor in most instances. Methods: A 17 year old male presented with asymptomatic nodule, which had developed on nipple with a four years of history and total excision and purse-string suture was then performed. Results: No recurrence was observed 2 months after excision. Histologically, it showed a well circumscribed tumor composed of characteristic clear epithelial cells which are focally arranged in glandular patterns. Conclusion: This case is unique in that the tumor developed on the young male nipple, unusual site and this report emphasizes the benefit of local excision to prevent recurrence of these tumor.

• Journal of the Korean Society of Radiology
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• v.83 no.1
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• pp.194-198
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• 2022

Clear cell hidradenoma (CCH) is a rare tumor of the sweat glands of eccrine or apocrine differentiation. It can occur anywhere in the body, but common sites of involvement are the head, face, trunk, and extremities. Although several reports have described sonographic findings of CCH, only one study on the axilla mentioned its strain elastographic findings. Here, we present a case of CCH in the right calf with its sonographic and strain elastographic findings in a tumor that looked like an epidermoid tumor.