• Journal of Korean Foot and Ankle Society
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• v.2 no.1
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• pp.13-18
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• 1998

Subungal exostosis is a rare benign cartilaginous tumor affecting the distal phalanx. From 1995 to 1996, six subungal exostoses of the hallux were treated in the Chonnam national university hospital. The symptoms were subungal pain, mass on the distal phalanx elevating the nail or causing ulceration of the nail bed. The plain radiological examination showed a bony mass occurring on the dorsomedial or medial aspect of the distal phalanx. The diagnosis of the subungal exostosis of the hallux were suspected from clinical presentation and confirmed with radiographic examination. Histological patterns were fibrocartilaginous cap with the mature trabecular bone. Complete excision of the lesion including overlying nail bed was curative without recurrence in all cases.

• Journal of Korean Foot and Ankle Society
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• v.6 no.2
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• pp.224-228
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• 2002

Ossification of the Achilles tendon is a rare condition to be distinguished from the more frequently occuring tendon calcification. It is characterized by the presence of an ossific mass contained within the fibrocartilaginous substance of the tendon and is usually associated with prior surgery or trauma to the tendon. We treated a 13 year old girl with ossification of the Achilles tendon after sprain-like injury. We excised it one year later and the microscopic finding of the extirpated bony mass revealed fully maturated lamellar bone.

• Archives of Craniofacial Surgery
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• v.11 no.1
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• pp.65-68
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• 2010

Purpose: Dermoid cysts are benign neoplasms that are derived from both ectoderm and mesoderm. Approximately 7 percent of all dermoid cysts occur in the head and neck, as most common sites are the lateral ends of the eyebrows, the midline in the nasal root and neck. Rarely they can be found in the frontal sinus, temporal bone, maxilla and the floor of the mouth. Dermoid cysts in the temporal fossa are extremely rare. We experienced a characteristic dermoid cyst that occupied the temporal fossa. Methods: A 16-year-old man had a progressive enlarging mass on the left eyebrow. Computerized tomographic scan showed a bulging mass in the temporal fossa, and it had the density similar to that of fat. The size of the mass was $3{\times}3{\times}2cm$, and it was composed of high density of fat with clear margin. There was no bony invasion, but the mass was fixed on bone. Results: We performed the surgery through coronal incision under general anesthesia. Because the mass was closely connected with temporal fat pads, we removed this mass with some portion of temporal fat pads, avoiding damage to the facial nerve. The postoperative course was ordinary without complication. Conclusion: The reports about dermoid cyst on the temporal fossa is uncommon. However, if there is a mass in the temporal fossa which has the density similar to that of fat in CT scan, we should consider the possibility of dermoid cyst. We suggest that excision through coronal incision with bewaring temporal fat pad can induce good result.

• Imaging Science in Dentistry
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• v.30 no.2
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• pp.132-137
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• 2000

Actinomycosis is defined as a chronic, specific, suppurative, granulomatous disease caused mainly by the anaerobic, gram positive organism, Actinomyces israelii. Actinomycosis in the salivary gland is a rare disease that is caused by an inhabitant of the normal flora. We report the case of the actinomycosis of submandibular gland. A 53-year old man presented with the swelling on left submandiblar area. The lesion was not painful but had been increasing for about 10 days. In the CT view, the internal portion of the mass showed homogeneous moderate signal. The mass had continuities with the inferior portion of the left enlarged submandibular gland. In the MRI, there was a mass that showed a buldging pattern inferiorly in the left submandibular gland without bony invasion sign. The biopsy shows the colony of special organism. Many filaments are discovered with clubbed ends diffused from center of colony. We diagnosed this disease as actinomycosis in the submandibular gland by the postoperational biopsy.

• Journal of Korean Neurosurgical Society
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• v.54 no.6
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• pp.518-520
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• 2013

Ossified lipoma or osteolipoma are rarely reported. It is defined as a histologic variant of lipoma that has undergone osseous metaplasia. Osteolipoma presents with a dominant osseous component within a lipoma. We report a case of a histologically confirmed osteolipoma on the nuchal ligament independent of bone. The patient was a 51-year-old female who presented with a 5-year history of a painless, progressively enlarging mass on the posterior neck. Computed tomography and magnetic resonance imaging showed a circumscribed mass compatible with fat between the C2 and C6 spinous processes with a large calcified irregular component. The mass with dual components was totally removed under general anesthesia and no recurrence was observed after 6 months of follow-up. We also reviewed the clinicopathologic features of previously reported osteolipomas in the literature and suggest that although osteolipoma is a rare variant of lipoma, it should be considered in the differential diagnosis when a lipoma of the posterior neck mixed with a bony component is encountered.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.33 no.6
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• pp.520-524
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• 2011

A 27-year-old female presented to our hospital with a slow growing, hard and soft palate mass on the right that had been present for the several months. Physical examination showed a 2 cm, firm, well-circumscribed, painless mass on the right side of the palate. PNS computer tomographic imaging showed a $1.5{\times}1.3{\times}2$ cm well-defined cystic mass on the right side of both the hard and soft palate without any underlying bone change. The lesion was completely excised under general anesthesia. In order to preserve the palatal mucosa, trapdoor approach for removal of the pleomorphic adenoma was done. This technique provided more comfortable healing of the operative site. Three years after surgery, there was no evidence of recurrence. If pleomorphic adenoma without bony and mucosal destruction exists, we suggest consideration of the trapdoor approach to protect the palatal mucosa. In view of the potential for tumour recurrence, long-term follow-up and careful examination are necessary.

• Journal of Yeungnam Medical Science
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• v.29 no.1
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• pp.45-47
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• 2012

Osteochondroma is a common bone tumor but a rare tumor in the rib. It is often asymptomatic and observed incidentally. This is a case report of a 49-year-old woman with an osteochondroma mimicking a mediastinal mass in hereditary multiple exostoses. The chest X-ray and computed tomography (CT) scans revealed the bony density feature of the mass. Surgical excision confirmed that the lesion was an osteochondroma.

• Archives of Craniofacial Surgery
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• v.25 no.4
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• pp.187-191
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• 2024

A 59-year-old woman presented to our clinic with a 3.5×3-cm protruding mass on her forehead. A skull X-ray revealed a radiolucent osteolytic lesion on the left side of the frontal bone. Additionally, computed tomography showed a 3.1×1.7×3.6-cm mass exhibiting a "sunburst" pattern situated between the outer and inner tables of the skull, just superior and lateral to the left frontal sinus. This pattern suggested the presence of an intraosseous vascular malformation (IVM). The lesion was approached via a bicoronal incision. En-bloc resection was performed, removing the mass along with approximately 0.5 cm of the surrounding normal bone without injury to the exposed frontal sinus mucosa. The exposed mucosa was reinforced with a galeal flap, and cranioplasty with bone cement was performed to repair the resulting bony defect. Pathological examination confirmed a diagnosis of intraosseous cavernous-type malformation with mixed cavernous and capillary histological features. We report this case of IVM and review the existing literature, highlighting the satisfactory functional and aesthetic outcomes after surgery.

• Korean Journal of Veterinary Research
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• v.49 no.1
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• pp.67-71
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• 2009

A 10-year old female Yorkshire terrier with nasal discharge and swelling was referred to the local animal hospital. Abnormal mass of right nasal cavity was detected in physical examination and radiography. According to the radiographs of the head, there was an evidence of bony destruction in right nose. Oronasal fistula was detected in right maxillary canine teeth. After surgical excision, the sample of nasal mass was refereed to Pathology Department of Veterinary Medicine in Jeju National University. Grossly, the enlarged mass was soft and 3 ${\times}$ 3 cm in size. Histopathologically, the neoplastic mass was composed of tubular to tubulopapillary structures which were lined by single to 6~7 layers of cuboidal to ciliated columnar cells. These neoplastic cells showed invasive tendency to adjacent normal parenchyma. They had uniform, round to oval nuclei, cytoplasm with small vacuoles and indistinct cellular margin. The number of mitotic figures was varied in different areas, ranged from 0 to 4 per high power field. Necrotic foci and infiltration of inflammatory cells including neutrophils, lymphocytes, and plasma cells also presented in the mass. Immunohistochemically, the neoplastic cells demonstrated strong positive reaction for cytokeratin (CK) 18 but were negative for CK 7 and 8. Based on the gross, histopathology and immunohistochemistry, this mass was diagnosed as nasal adenocarcinoma originated from respiratory epithelium.

• Archives of Craniofacial Surgery
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• v.11 no.2
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• pp.103-106
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• 2010

Purpose: Giant cell tumors of the bone are rare, locally aggressive lesions that primarily affect the epiphysis of the long bones in young adults. These tumors occur very rarely on the skull, principally in the sphenoid and temporal bones. The occipital bone is an unusual site. We report a rare case of a giant cell tumor of the occipital bone with a review of the relevant literature. Methods: A 7-year-old boy presented with a mass of the right occipital area, which was accompanied by localized tenderness and mild swelling. The mass was first recognized approximately 1 year earlier and grew slowly. There was no significant history of trauma. The physical examination revealed a nonmobile and non-tender bony swelling on the occipital region. The neurological evaluation was normal. The serial skull radiography and CT scan showed focal osteolytic bone destruction with a bulged soft tissue mass in the right occipital bone. The patient underwent a suboccipital craniectomy and a complete resection of the epidural mass. The lesion was firm and cystic. The mass adhered firmly to the dura mater. Results: The postoperative clinical course was uneventful, and the patient was discharged 5 days later. The histopathology report revealed scattered multinucleated giant cells and mononuclear stromal cells at the tumor section, and the giant cells were distributed evenly in the specimen, indicating a giant cell tumor. Conclusion: Giant cell tumors are generally benign, locally aggressive lesions. In our case, the lesion was resected completely but a persistent long term follow up will be needed because of the high recurrence rate and the possible transformation to a malignancy.