Benign tumors of the testis are rare, accounting for one percent of all testicular tumors including epidermoid cyst of the testis. Herein we report one case of epidermoid cyst of the testis and discuss the pathological criteria for diagnosis and clinical management of the lesion.
Diagnosis ; Epidermal Cyst* ; Testicular Neoplasms ; Testis*

BACKGROUND: Dermoid cysts of the auricular area are extremely rare. We report on six cases of auricular dermoid and epidermoid cyst, and differentiate dermoid cyst from epidermal cyst along with a review of the literature. METHODS: Three cases involved a gradually enlarging mass of the superior and anterior aspect of the helix of their ear. Another two cases were located in the posterior aspect of the ear. RESULTS: During the operation, a tumor was found just under the skin, not fixed mastoid or adjacent cartilage. Histologically, all specimens contained desquamated squamous epithelium and keratin in the lumen. However, two cases of posterior masses showed the presence of adnexal structures and three cases did not. CONCLUSION: A key in diagnosis of the dermoid cyst is the presence of adnexal structures. If the wall does not bear adnexal structures, the term epidermoid or keratin cyst is applied. Acquired cysts are most commonly of traumatic origin and result from an implantation or downward displacement of an epidermal fragment. Finally, the congenital epidermoid cyst grew at the upper part of the auricle; however, the dermoid cyst grew at the lower and posterior part of the auricle.
Cartilage ; Dermoid Cyst* ; Diagnosis ; Ear ; Epidermal Cyst ; Epithelium ; Mastoid ; Skin

BACKGROUND: An epidermal cyst is a common keratin-filled epithelial-lined cyst. The treatment of choice for epidermal cysts is surgical excision. If the cyst becomes ruptured, inflamed, or infected, then incision and drainage together with oral antibiotic therapy or intralesional steroid injection treatment is required. Identification of ruptured and unruptured cysts is important for treatment decisions. OBJECTIVE: The purpose of this study was to evaluate the usefulness of ultrasonography in the diagnosis of epidermal cysts, and to analyze distinctive features that can differentiate between ruptured and unruptured epidermal cysts. METHODS: We reviewed the clinical and sonographic features of pathologically confirmed epidermal cysts from 2 subgroups of 66 patients: 30 with unruptured cysts and 36 with ruptured cysts. The sonographic features used in the analysis included tumor size, margin, shape, tumor texture, posterior echo, internal debris, and lesion vascularity on color Doppler sonography. RESULTS: The mean long diameter of the cysts was 10.95 mm in the unruptured cyst group and 12 mm in the ruptured cyst group. Some sonographic features, including heterogenous and hypoechoic echo texture, posterior echo enhancement, and internal hyperechoic and hypoechoic debris, showed no significant differences between the groups (p>0.05). The unruptured cyst group showed cysts with significantly higher frequencies of a well-circumscribed margin, an ovoid shape, and no vascular flow (p<0.05). In contrast, the ruptured cyst group usually had cysts with a poorly defined or slightly poorly defined margin, an irregular shape, peripheral vascular flow, and mild or moderate flow vascularity. CONCLUSION: The results of this study indicate that ultrasonography is helpful in differentiating between ruptured and unruptured epidermal cysts.
Diagnosis ; Diagnosis, Differential* ; Drainage ; Epidermal Cyst* ; Humans ; Ultrasonography*

BACKGROUND: An epidermal cyst is a common keratin-filled epithelial-lined cyst. The treatment of choice for epidermal cysts is surgical excision. If the cyst becomes ruptured, inflamed, or infected, then incision and drainage together with oral antibiotic therapy or intralesional steroid injection treatment is required. Identification of ruptured and unruptured cysts is important for treatment decisions. OBJECTIVE: The purpose of this study was to evaluate the usefulness of ultrasonography in the diagnosis of epidermal cysts, and to analyze distinctive features that can differentiate between ruptured and unruptured epidermal cysts. METHODS: We reviewed the clinical and sonographic features of pathologically confirmed epidermal cysts from 2 subgroups of 66 patients: 30 with unruptured cysts and 36 with ruptured cysts. The sonographic features used in the analysis included tumor size, margin, shape, tumor texture, posterior echo, internal debris, and lesion vascularity on color Doppler sonography. RESULTS: The mean long diameter of the cysts was 10.95 mm in the unruptured cyst group and 12 mm in the ruptured cyst group. Some sonographic features, including heterogenous and hypoechoic echo texture, posterior echo enhancement, and internal hyperechoic and hypoechoic debris, showed no significant differences between the groups (p>0.05). The unruptured cyst group showed cysts with significantly higher frequencies of a well-circumscribed margin, an ovoid shape, and no vascular flow (p<0.05). In contrast, the ruptured cyst group usually had cysts with a poorly defined or slightly poorly defined margin, an irregular shape, peripheral vascular flow, and mild or moderate flow vascularity. CONCLUSION: The results of this study indicate that ultrasonography is helpful in differentiating between ruptured and unruptured epidermal cysts.
Diagnosis ; Diagnosis, Differential* ; Drainage ; Epidermal Cyst* ; Humans ; Ultrasonography*

Cysts of the spleen are uncommon disease entities and can be classified as either primary (true) or secondary (pseudo-) depending on the presence of a true epithelial lining. True nonparasitic cysts of spleen are very rare, and the majority of the cases are classified as epidermoid cysts. True splenic cysts were found in three children during the last eleven years (1989~1999) in Yeungnam University Hospital. Two of the children were girls and one was boy. The age at diagnosis ranged from 7 to 15 years. Abdominal ultrasonography was utilized to the initial diagnosis, and computerized tomography was done for the detailed studies. Radionuclide scanning was performed in a patient. Surgical resection (one partial splenectomy and two total splenectomies) was performed. The cysts were from 4cm to 9cm in maximum diameter. Pathologic finding was epidermoid cyst of the spleen.
Child ; Diagnosis ; Epidermal Cyst ; Female ; Humans ; Male ; Spleen ; Splenectomy ; Ultrasonography

Parosteal lipoma is a rare benign lipomatous neoplasm and found in close or direct apposition to bone, most commonly in the extremities. In the forehead, it is called subgaleal lipoma because of the location between the galea and the periosteum of the frontal bone. Clinically it presents as a round to oval, smooth, firm and relatively fixed, flat or dome shaped mass, unlike the usual lipoma. A parosteal lipoma in the forehead tends to be misdiagnosed initially as other superficial lesions such as epidermal cyst. Therefore, clinical recognition of the tumor and its location is important preoperatively so that the incision is deep enough to find the lesion and to make the correct diagnosis of most firm forehead masses.
Diagnosis ; Epidermal Cyst ; Extremities ; Forehead* ; Frontal Bone ; Lipoma* ; Periosteum

BACKGROUND: An epidermal cyst is a common keratin-filled epithelial-lined cyst. The treatment of choice for epidermal cysts is surgical excision. If the cyst becomes ruptured, incision and drainage with oral antibiotic therapy or intralesional steroid injection are required. OBJECTIVE: To analyze the dermoscopic features that can differentiate between ruptured and unruptured epidermal cysts. METHODS: The clinical and dermoscopic features of the pathologically confirmed epidermal cysts of two subgroups of 38 patients, 20 with unruptured cysts and 18 with ruptured cysts, were reviewed. RESULTS: With regard to the dermoscopic features, an ivory- white background color and punctum were commonly found in both groups (p>0.05). The unruptured-cyst group showed higher frequencies of pore sign (p<0.05), blue-white veil (p>0.05), no vascular structure, and arborizing telangiectasia (p<0.05), but the ruptured-cyst group usually had red lacunae (p>0.05) and peripheral linear branched vessels (with an erythematous rim) (p<0.05). CONCLUSION: Dermoscopy is helpful in differentiating between ruptured and unruptured epidermal cysts.
Dermoscopy* ; Diagnosis, Differential* ; Drainage ; Epidermal Cyst* ; Humans ; Telangiectasis

BACKGROUND: An epidermal cyst is a common keratin-filled epithelial-lined cyst. The treatment of choice for epidermal cysts is surgical excision. If the cyst becomes ruptured, incision and drainage with oral antibiotic therapy or intralesional steroid injection are required. OBJECTIVE: To analyze the dermoscopic features that can differentiate between ruptured and unruptured epidermal cysts. METHODS: The clinical and dermoscopic features of the pathologically confirmed epidermal cysts of two subgroups of 38 patients, 20 with unruptured cysts and 18 with ruptured cysts, were reviewed. RESULTS: With regard to the dermoscopic features, an ivory- white background color and punctum were commonly found in both groups (p>0.05). The unruptured-cyst group showed higher frequencies of pore sign (p<0.05), blue-white veil (p>0.05), no vascular structure, and arborizing telangiectasia (p<0.05), but the ruptured-cyst group usually had red lacunae (p>0.05) and peripheral linear branched vessels (with an erythematous rim) (p<0.05). CONCLUSION: Dermoscopy is helpful in differentiating between ruptured and unruptured epidermal cysts.
Dermoscopy* ; Diagnosis, Differential* ; Drainage ; Epidermal Cyst* ; Humans ; Telangiectasis

Sixty-one cases in which the diagnosis of epithelial cysts had been made studied. The data were collected from our own clinical records and a review of all histopathologic slides of epithelial aysts that had been filed at Departrnent of Dermatology, Chosun University Hospita.l during the past g years from July, 1979 to June, 1984. The results were as follows: 1) Among the 61 cases of epithelial cysts, 41 cases were epidermal cysts, 10 cases of milia, 7 cases of steatocystoma. multiplex, 2 cases of pilar cysts and 1 case of eruptive vellus hair cyst. 2) The average age of these patients was third decade. 3) The commonest site of epidermal cyst and milium was face. Two cases of pilar cyst occurred only on the scalp. Fteatocystoma multiplex was developed on the several sites, but not on the scalp and scrotum, 4) The average diameter was 6. 5 mm for epidermal cyst, p 6 mm for milium, 3 1 mm for steatocystoma multiplex and 17 mm for pilar cyst.
Dermatology ; Diagnosis ; Epidermal Cyst ; Hair ; Humans ; Scalp ; Scrotum ; Steatocystoma Multiplex

A case of epidermoid cyst in the cerebello-pontine angle, resulting in trigeminal neuralgia, is presented. There were no abnormal findings in the clinical and radiologic examination except the typical neuralgic pain. The tumor was found incidentally during posterior fossa exploration for neurovascular decom pression of the trigeminal nerve under diagnosis of primary trigeminal neuralgia. The patient was treated with only removal of the tumor.
Diagnosis ; Epidermal Cyst* ; Humans ; Trigeminal Nerve ; Trigeminal Neuralgia*