Soft tissue: Hibernomas
نویسندگان
چکیده
Note Brown adipose tissue is rich in glycogen, cholesterol and phospholipids. In contrast to white adipose tissue, which stores energy, brown fat is involved in nonshivering thermogenesis. This ability is dependent on the expression of uncoupling protein 1 (UCP1), a mitochondrial proton transporter that uncouples electron transport from ATP production. In humans, brown adipose tissue typically accumulates within the neck, axillae, back, subpleural regions, mediastinum, abdomen and thigh, and is more profuse in the fetus and neonate, in whom it constitutes approximately 5% of body weight. Beginning at about 8 weeks after birth brown adipose tissue gradually decreases. In adult life, it progressively disappears and is confined to the more central parts of the body, which leads to a vest-like arrangement with the greatest yields of brown fat in perirenal, posterior cervical and axillary lymph nodes, and intercostals areas.
منابع مشابه
Multiple hibernomas in a 1-month-old female infant.
Hibernoma is a rare benign soft tissue tumor composed of remnants of fetal brown fat. It has only rarely been reported in the literature in patients ranging in age from 2 to 75 years. We present a case of multiple hibernomas occurring in a 1-month-old infant.
متن کاملHibernoma – two patients with a rare lipoid soft-tissue tumour
BACKGROUND Hibernomas are rare benign soft-tissue tumours arising from brown fat tissue. Although imaging characteristics are not specific certain imaging features, common locations and patient demographics may suggest hibernoma as a differential diagnosis. CASE PRESENTATION We report on two 48-year-old male patients with hibernoma. The tumour presented with local swelling of the inguinal reg...
متن کاملIntraosseous Hibernoma: A Rare and Unique Intraosseous Lesion
BACKGROUND Hibernoma is a rare benign tumor of adults that is composed of multivacuolated adipocytes resembling brown fat cells. Hibernoma typically occurs in soft tissue, and intraosseous examples are very rare. Intraosseous hibernomas can radiologically mimic metastatic carcinoma and other tumorous conditions. METHODS To collect the intraosseous hibernomas, we searched the pathologic databa...
متن کاملCervical hibernoma in a two year old boy
Hibernomas are uncommon benign soft tissue tumours mimicking brown fat. They are mostly seen in the fourth and fifth decades of life. Only few cases in the cervical area have been reported. Because of its rarity in pediatrics and difficult diagnosis, we report a tow year-old patient with a cervical tumor. Ultrasound and computed tomography exams showed an infiltrative, with hypervascular and li...
متن کاملLaryngeal hibernoma: case series of a rare tumor.
BACKGROUND Hibernomas are rare, benign tumors of brown adipose tissue uncommonly found in the head and neck. METHODS A review of the English-language literature was conducted for this study. We present a series of 2 laryngeal hibernomas treated with transoral laser microsurgical resection at a tertiary referral center over a period of 18 years. RESULTS Only 2 cases of laryngeal hibernoma ha...
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Hibernomas are rare benign adipose tumors composed of brown fat cells with granular, multivacuolated cytoplasm admixed with white adipose tissue. They account for 1.6% of benign lipomatous tumors and approximately 1.1% of all adipocytic tumors. They are more common in the third and fourth decades of life. The most common location is the thigh, followed by the shoulder, back, and head and neck. ...
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