• Journal of Korean Foot and Ankle Society
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• v.11 no.1
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• pp.97-99
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• 2007

Nail bed malignancies are rare entities. Most nail bed malignancies are squamous cell carcinoma (SCC)s. Less than 10% of subungual SCCs occur in the foot. Fifty percent occurred on the hallux and approximately 25% on both the fourth and fifth digits. The correct diagnosis is often delayed because nail bed malignancies are frequently mistaken for benign or infectious processes. SCC on extremities is hard to distinguish from the benign lesion like chronic ulcer, fistula caused by chronic osteomyelitis, and abscess fistula. Attention should especially be paid in diagnosing the subungual lesion because paronychia is a common disease. SCC is the most common carcinoma second to malignant melanoma as a soft tissue malignant tumor in the West, and it involves mainly the head, neck and upper extremities but rarely involves lower extremities, particularly the toes. The authors emphasize the importance of a biopsy for chronic nonhealing lesions by presenting this case.

• Journal of Korean Neurosurgical Society
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• v.45 no.2
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• pp.107-111
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• 2009

Meningiomas are usually benign neoplasms in which extracranial metastases occur very rarely. We report a case of multiple extracranial metastases of an atypical meningioma following a local recurrence. A 68-year-old man presented with left-side motor weakness and dysarthria for two weeks. A computed tomography (CT) scan and magnetic resonance imaging (MRI) showed an intraventricular tumor. We performed a total mass removal, and the histopathologic findings were consistent with benign meningioma. Eight months later, the meningioma recurred. We performed a reoperation and whole brain radiation therapy postoperatively. The histopathologic findings showed atypical meningioma. Six months later, CT and MRI revealed metastases to multiple vertebrae, lung, ribs and perirenal soft tissue so a decompressive laminectomy with mass removal was performed. The histopathologic findings of the spinal tumors showed atypical meningioma. The results from perirenal biopsies were consistent with metastatic meningioma. In conclusion, extracranial metastasis as well as local recurrence must be considered in atypical or anaplastic meningioma. There must be regular follow-ups. Finally, an evaluation of the chest, abdomen and bone is necessary, especially when related symptoms or signs develop.

• Journal of Chest Surgery
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• v.24 no.6
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• pp.547-554
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• 1991

From May 1965 to December 1990, 78 patients with chest wall tumors were operated on. The mean age of the patients was 31.5 years with 50 male and 28 female patients. Forty-nine cases[62.8%] were developed at bony or cartilaginous wall and 29 cases[37.2%] at soft tissue of chest wall. Thirty-two of them[41.0%] were malignant, either primary or metastatic, and 46 tumors[59.0%] were histologically benign. For 55 patients who were operated on since 1982, 6 surgical biopsies. 39 tumor excisions, and 11 wide excisions with chest wall reconstruction were done. Preoperative factors favoring diagnosis of malignant neoplasm were; 1] old-aged male patient, 2] bone or cartilaginous tumors, 3] involvement of multiple ribs, 4] complaint of pain, 5] large size on palpation[larger than 4cm]. With proper diagnosis and management plan, we think, operations of chest wall tumors can give good results.

• Archives of Reconstructive Microsurgery
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• v.23 no.2
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• pp.86-88
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• 2014

A schwannoma is a benign soft tissue tumor arising from the nerve sheath of a Schwann cell. Clinically, a schwannoma is an asymptomatic mass rarely causing neurologic deficits. However, it can cause discomfort as well as motor and sensory disturbances by compressing the nerve of its origin. The authors encountered a huge schwannoma arising from the median nerve at the proximal forearm, which caused symptoms mainly in the ulnar nerve. The tingling sensation along the ulnar nerve disappeared completely after enucleation of the schwannoma originating from the median nerve.

• Journal of Oral Medicine and Pain
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• v.37 no.3
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• pp.141-146
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• 2012

Lipoma is a benign tumor composed of mature adipocytes and the most common soft tissue mesenchymal neoplasm but relatively rare in the oral cavity. Lipoma of the tongue is uncommon and especially multiple lipomas are quite rare and only several cases of those were reported. We describe an unusual case of multiple lipomas of the tongue.

• Journal of Oral Medicine and Pain
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• v.44 no.1
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• pp.35-39
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• 2019

Calcifying aponeurotic fibroma (CAF) is an uncommon benign soft-tissue fibroblastic tumor with characteristic histological features. It mainly occurs in the distal part of the extremities, such as the hands and feet, in children and adolescents. Males are twice as commonly affected as females. CAF exhibits local invasiveness, and hence, its recurrence rate is also high. Therefore, complete surgical excision is both diagnostic and therapeutic. The occurrence of CAF in the maxillofacial region, especially the temporomandibular joint (TMJ), is very rare, and this necessitates its differentiation from other TMJ neoplasms. The differential diagnosis of CAF requires microscopic examination. Herein, we report a rare case of CAF located at the left mandibular condyle, which was confirmed by histopathological analysis.

• Journal of Veterinary Clinics
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• v.39 no.3
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• pp.107-113
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• 2022

This paper describes the computed tomographic features of ovarian masses in dogs. The CT images of female dogs with a confirmed histological diagnosis of ovarian tumors or ovarian cystic diseases were studied retrospectively. Seven dogs met the inclusion criteria. The morphological features of ovarian tumors and ovarian cystic diseases coincided to a certain degree, but ovarian tumors tended to be predominantly solid. Objective measurements of Hounsfield units (HU) suggest that benign lesions may show lower HU values than malignant tumors and mild contrast enhancement because of the small soft tissue composition. CT is useful for a differential diagnosis of ovarian masses by providing additional information on the imaging features of the masses and an evaluation of metastases.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• v.12 no.1
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• pp.57-63
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• 2009

Calcifying fibrous tumors (CFTs) are unusual benign tumors of childhood, located primarily in soft tissues, pleura, and peritoneum. The cause and pathogenesis are unclear. We report a rare case of a CFT in a 2-year-old boy who presented with vomiting and abdominal distension. An abdominal X-ray showed an elliptical, calcific shadow in the LUQ area mimicking a foreign body. An internally protruding mass along the lesser curvature of the gastric body was an incidental finding during upper endoscopy, biopsies of which were negative. Abdominal CT showed a 4.5${\times}$3.2 cm soft tissue mass of the gastric wall with calcifications. A diagnosis of gastric submucosal mass was suspected and a wedge resection of the stomach was performed. On microscopic examination, the tumor was composed of whorls of dense hyalinized collagen bundles with a few fibroblasts. There were also amorphous dystrophic calcifications and nodular aggregates of mononuclear inflammatory cells. Immunohistochemically, spindle cells did not stain for anaplastic lymphoma kinase-1 (ALK-1), CK, smooth muscle actin (SMA), or desmin. Taken together, the mass was compatible with a CFT of the gastric wall. This is the first reported case of CFT in a Korean child.

• 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.

• The Journal of the Korean bone and joint tumor society
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• v.5 no.4
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• pp.235-238
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• 1999

Chondroblastoma of the patella is a uncommon benign neoplasm in the middle aged person. Furthermore, a hemorrhagic cystic change associated with chondroblastoma is extremely rare. We experienced a case of chondroblastoma which underwent hemorrhgic cystic change. A fiftyyear-old female patient has suffered from right knee joint pain for 1 month before. Dominant gross feature was hemorrhagic cyst which was not involved into the joint space. Soft tissue was curetted and it was diagnosed to be chondroblastoma. The case was treated with curettage and bone graft.