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Clear Cell Hidradenoma: Characteristic Imaging Features on Ultrasonography, Computed Tomography, and Magnetic Resonance Imaging
Author(s) -
Lee Joo Yeon,
Kang Byeong Seong,
Shim Hyun Seok,
Song In Hye,
Kim Misung,
Lee Sang Hoon,
Chung Hye Won,
Lee Min Hee,
Shin Myung Jin
Publication year - 2018
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.1002/jum.14552
Subject(s) - medicine , magnetic resonance imaging , ultrasonography , computed tomography , radiology , tomography , nuclear medicine , nuclear magnetic resonance , physics
Objectives The purpose of this study was to evaluate the imaging features of clear cell hidradenoma on ultrasonography (US), computed tomography (CT), and magnetic resonance imaging (MRI). Methods The radiologic and pathologic databases at 2 medical institutions were searched retrospectively from 2004 to 2016 to identify patients with a diagnosis of clear cell hidradenoma. Ultrasonographic, CT, and MRI features were described, and pathologic specimens were reviewed. Results There were 5 female and 4 male patients. The mean patient age was 48.9 years (range, 28–70 years). Five patients underwent only US; 2 patients underwent only CT; 1 patient underwent both US and CT; and 1 patient underwent US and MRI. Most of the tumors were located primarily in the subcutaneous fat layer. The mean tumor size was 18.4 mm. On US, 6 masses had a heterogeneous echo texture, including an anechoic portion with protruding echogenic portions. Two masses had multiple septa in the anechoic portion. On color Doppler US, blood flow was both central and peripheral in 5 patients. All 3 cases seen on CT presented as a low‐attenuation mass with an enhanced solid internal nodule. On MRI, the mass showed heterogeneous signal intensity on T2‐weighted images and enhancement of the peripheral wall and internal solid component on contrast‐enhanced T1‐weighted images. Conclusions Clear cell hidradenoma is usually located in the subcutaneous fat layer, has a well‐defined margin, appears as a cystic mass with an internal solid nodule, and occasionally has multiple septa on US, CT, and MRI.