Clinical features and ultrasonic manifestations of 16 cases of hair tumors in head and neck
Objective To investigate the clinical and ultrasonographic features of hair tumors in the head and neck.Methods A retrospective analysis of 16 cases of head and neck hair structure tumors diagnosed by pathology in Sichuan Cancer Hospital from December 2017 to January 2022 was performed.The clinical features,manifestations by conventional ultrasound and contrast-enhanced ultrasound were summarized.Re-sults There were 20 lesions in 16 cases,of which 17 lesions were located in the scalp in 13 cases,two lesions were located in the neck,and one lesion was located in the chin.The mean age at disease onset was (38.3± 14.9) years,and the mean age of treatment was (49.5±14.9) years.The interval between onset and treat-ment ranged from 1 month to 40 years.There were 12 cases of trichilemmal cyst and a total of 16 lesions. There were two cases of trichofolliculoma,one case of proliferating trichilemmal tumor with seborrheic kera-tosis,one case of infundibular cyst of hair follicle,each with one lesion.The maximum diameter of the lesions ranged from 0.8 to 9.8 cm,with an average of (2.58±1.61) cm.On gray scale ultrasound,all tumors were circular or oval nodules with regular shape and clear outline.All 16 trichilemmal cysts had mixed echo and Ad-ler grade 0 blood flow.Four of them underwent contrast-enhanced ultrasound without enhancement.One case of trichofolliculoma was hyperechoic with Adler grade 0 blood flow.One case of trichofolliculoma presented slightly hypoechoic,and basal blood flow was Adler grade 2.One case of proliferating trichilemmal tumor was characterized with hyperecho in the middle and calcification,and annular hypoecho in the margin.Conclusion In addition to the head and neck hair tumors,the trichilemmal cyst is the most common,which occurs in the scalp.Ultrasound can better judge the location,number and involvement level of the lesion.The cystic nature can be determined by Color Doppler flow imaging and contrast-enhanced ultrasound.
head and necktrichilemmal cysttrichofolliculomaproliferating trichilemmal tumorclinical featuresultrasonic manifestationscontrast-enhanced ultrasound
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