• Archives of Plastic Surgery
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• v.49 no.5
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• pp.648-651
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• 2022

Nasal dermoid cysts are rare congenital anomalies that affect one in 20,000 to one in 40,000 individuals. Herein, we report a case of an initially misdiagnosed nasal dermoid cyst with intracranial extension. Among nasal dermoids, the lesion of the nasal tip is considered uncommon. Therefore, this should always be considered as a differential diagnosis of midline nasal masses, and a proper diagnostic approach should be taken.

• Korean Journal of Head & Neck Oncology
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• v.36 no.1
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• pp.27-31
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• 2020

The midline nasal dermoid cysts are rare congenital neoplasms, which are diagnosed frequently in childhood. Masses are often noticeable at birth gaining size over time with recurrent infections and usually arise from the nasal cavity or lower 1/3 of the nasal dorsum. CT scan as the primary investigation is helpful to determine accurately the size and extent of the lesion as well as the integrity of adjacent bony structures. MRI scan is recommended to rule out an intracranial extension or sinus tracts. Treatment of choice is the complete surgical excision preserving the cyst wall. Here in, we present an unusual case of nasofrontal dermoid cyst in a 19-year-old boy without radiographic evidence of transcranial extension. In this case, we surgically removed nasofrontal dermoid cyst via transcolumellar approach. We also corrected saddle nose deformity after mass removal. Therefore, in this case, we experienced a successful case in which the nasofrontal dermoid cyst was totally removed without facial scar and deformity.

• Archives of Plastic Surgery
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• v.37 no.4
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• pp.481-484
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• 2010

Purpose: Congenital dermoid cysts develop during the fusion of the embryo when the ectodermal tissue gets trapped in the line of fusion. Dermoid cysts of the head are rare lesions comprised of epidermal and mesodermal elements. Furthermore, dermoid cysts in the occipital area are extremely rare. Only a few cases of dermoid cysts in the posterior scalp have been reported. Especially, A bilateral, synchronous presentation in this location has not been reported previously in the literature. Methods: All 5 cases had a gradually enlarging mass of the posterior aspect of the scalp. The cysts were mobile, noncompressible, and non-tender, without evidence of an associated sinus tract, skin dimpling, discoloration, or communication with adjacent structures. The CT scan displayed a hypodense cystic lesions about -87 to +24 HU (Housefield units, average +3.2 HU) with hypodense capsule and no postcontrast enhancement. All tumors were found just under the skin, and were well encapsulated, so they were completely removed the mass with adjacent periosteum. Results: On gross findings, all tumors were oval-or round-shaped, and when the cystic tumor was cut open it presented a greasy and caseous substance. Histologically, all specimens contain desquamated squamous epithelium and keratin in the lumen and are encapsulated and lined by keratinized stratified squamous epithelium. And, all cases of posterior mass are the presence of adnexal structures. Conclusion: Appropriate diagnosis requires not only an index of suspicion for this rare tumor a very careful history and search for skin changes. Especially, CT can reveal the exact location of the cyst, its relationship with the adjacent structures. We think that occipital dermoids divide into superficial and deep type. In our cases, because they did not have intra-cranial involvement or fistula formation, they are superficial type. This report describes the clinical and operative aspects of the superficial dermoid cysts and provides a review of the literatures.

• Investigative Magnetic Resonance Imaging
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• v.21 no.2
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• pp.114-118
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• 2017

Dermoid cysts are benign congenital tumors composed of keratinizing squamous epithelium and dermal derivatives. They account for less than 1% of all intracranial tumors and are rarely exhibited at the base of the skull. To the best of our knowledge, only one case report has presented computed tomography and conventional T1-weighted magnetic resonance (MR) findings that revealed an infratemporal dermoid cyst. In the present study, we report an unusual case of a dermoid cyst in the right infratemporal fossa, which was incidentally detected by MR imaging with the Dixon technique. This article also highlights the importance of meticulous radiological review and the usefulness of the Dixon technique in everyday clinical practice.

• Journal of Korean Neurosurgical Society
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• v.40 no.5
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• pp.391-393
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• 2006

Dermoid cysts of the spinal canal are rare benign congenital tumors, accounting for $1{\sim}2%$ of all intraspinal tumors. We report a case of lumbar extramedullary cyst, combined with congenital sacral meningocele. The clinical features, characteristics on MRI, pathologic findings, and surgical treatment of such a rare extramedullary benign tumor is discussed with the relevant literature.

• Journal of Veterinary Clinics
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• v.22 no.3
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• pp.268-270
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• 2005

A corneal dermoid is a benign congenital mass usually affecting the lateral limbal region. A 3-month old male Shih Tzu dog with abnormal tissue on right cornea was referred to Veterinary Medical Teaching Hospital of Seoul National University. On ophthalmic examination, there was no evidence of visual impairment. Slit lamp biomicroscopy assessment revealed a mass, located in the inferior and temporal part of right cornea. The lesion was typically hemispheric and covered with pink skin. Superficial keratectomy was performed to remove the mass. On histopathological examination, the lesion was diagnosed as a corneal dermoid. Four months after operation, there had been no recurrence and hair regrowth.

• Advances in pediatric surgery
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• v.7 no.1
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• pp.7-14
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• 2001

Congenital anomalies of the head and neck region such as preauricular sinus and skin tag, thyroglossal duct cyst, branchial anomaly, cystic hygroma and dermoid cyst are common in pediatric population. It is important for pediatricians and pediatric surgeons to be familiar with the embryology and the anatomical characteristic of these lesions in order to diagnose and treat them properly. Three hundred and nineteen patients with congenital head and neck anomalies treated at Hanyang University Hospital between 1980 and 1999 were reviewed to determine the relative frequency of the anomalies and to analyze the method of management. Eight-four (25.1 %) of 335 lesions were preauricular sinus and skin tag, 81 (24.2 %) were thyroglossal duct cyst, 81 (24.2 %) branchial anomaly, 58 (17.3 %) cystic hygroma and 31 were (9.2 %) dermoid cyst. The male-to-female ratio was 1.4:1. Thyroglossal duct cyst most commonly present at 3-5years, however branchial anomalies commonly are diagnosed in children younger than 1 year. Preauricular sinus showed familial tendency in three patients and was bilateral is 33.8 %. Most head and neck anomalies in children have specific clinical and anatomical characterics. A careful history and physical examination is very useful for diagnosis and proper management. Experienced pediatric surgeons should do the initial surgery since the recurrence rate after incomplete surgical excision can be high.

• Proceedings of the Korean Society of Veterinary Clinics Conference
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• 2009.10a
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• pp.223-223
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• 2009

• Archives of Plastic Surgery
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• v.43 no.6
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• pp.608-609
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• 2016

• Clinical and Experimental Pediatrics
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• v.49 no.9
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• pp.1000-1004
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• 2006

Atretic cephalocele is a degenerative form of encephalocele, which is detected as a cystic mass in the head, primarily in infants. Its presentation and prognosis vary and depend on various factors, including the nature of the tissues within the cyst, other concomitant anomalies, the site of development, and the presence or absence of an embryonic straight sinus. We here report 2 cases of atretic encephalocele, that were transferred to our hospital because round tumors, misdiagnosed as dermoid cysts, were detected in their parietal lobes immediately after birth. On diagnostic and differential MRI, an embryonic straight sinus was detected while histochemical results indicated that the lesions contained cerebral tissues. Despite these structural anomalies, the two patients developed normally neurologically and no other anomalies were detected. We here discuss these two cases and present a review of the relevant literature.