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11/337. Cystic hygroma of the skull base.

    Cystic hygroma is a benign developmental tumor formed by lymph vessels that occurs in 1 of 12000 individuals and presents most frequently in the head and neck. It is often difficult to manage because the tumor frequently envelopes nearby vital structures. Lesions that extend significantly above the hyoid are especially difficult to excise because of the complexity of achieving a complete excision. This article describes a series of 3 cases of cystic hygroma that presented in the head and neck and, on further investigation, were found to also involve the skull base. This anatomic location is exceedingly rare, and these 3 cases represent new and difficult challenges not previously discussed in the literature, to our knowledge.
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keywords = neck
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12/337. The detection of small carcinoma with 18F-FDG using a dual head coincidence camera.

    Tumour imaging with F18-fluorodeoxyglucose (18F-FDG) has yielded promising results for the detection of a variety of tumours. Owing to the high costs and limited availability of dedicated Positron emission tomography (PET) scanners, alternative methods of imaging the 511-KeV photons of positron emitters have been sought. With a dual head coincidence camera PET scanning of FDG is possible. The system parameters, such as sensitivity and spatial resolution, are already measured, but the clinical experience of this alternative imaging method is very limited. Two cases are described in which tumours with a diameter of 4 and 5 mm, respectively, were detected using a dual head coincidence camera. The presented cases support the use of this converted gamma camera in head and neck oncology.
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keywords = neck
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13/337. Bilateral recurrent adult rhabdomyomas of the pharyngeal wall.

    adult rhabdomyomas of the head and neck are uncommon benign skeletal muscle tumors. Only a few cases occurring in the pharyngeal wall have been described in the world literature. We present a case of recurrent bilateral rhabdomyomas in the pharynx and discuss the clinicopathological features of this lesion, comparing it to those of other neoplasms from which it must be differentiated. To our knowledge, bilaterality of this type of lesion has not been described previously. Although adult rhabdomyomas have a distinct histology, they often are mistaken for a variety of other lesions, particularly granular cell tumor.
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keywords = neck
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14/337. Alveolar soft part sarcoma of the tongue.

    We report a case of alveolar soft part sarcoma--a rare malignancy that presented as a swelling at the base of the tongue in a 5-year-old child. Only about one-quarter of the few reported cases arise within the head and neck, the tongue and orbit being the favoured sites.
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keywords = neck
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15/337. Reconstruction of the scalp and cranium using multiple free-tissue transfers following recurrent basal cell carcinoma.

    It is well-recognised that recurrent disease can occur following surgery for malignancy in the head and neck region. This is particularly true of basal cell carcinoma in which recurrences may occur over many years and despite the use of different treatment modalities. Reconstruction of large defects may become increasingly difficult and can be optimally managed by free tissue transfer. The authors report a case of basal cell carcinoma that has required treatment for over 20 years, unique in that on five different occasions, free flaps have been used for reconstruction.
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keywords = neck
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16/337. Hyperfunctioning parathyroid carcinoma.

    Primary hyperparathyroidism is rarely caused by carcinoma. We report a patient who manifested many of the clinical and radiographic features of the disease. When encountering symptomatic hypercalcemia with or without a palpable neck mass, carcinoma should be considered in the differential diagnosis. Patient survival depends on an aggressive surgical approach to the primary lesion and recurrent disease.
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keywords = neck
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17/337. Intraosseus teratoma of the iliac bone.

    We present a 4-year-old child with a large iliac bone mass incidentally discovered in a plain abdominal radiograph. The pathological examination revealed a benign mature teratoma. To the best of our knowledge, the occurrence of intraosseous mature teratoma has not been previously reported. The child had had an immature teratoma of the neck discovered in a fetal ultrasound, and resected on day 6 of life. The neck teratoma recurred twice, at 16 months and at 3.5 years of age. In these two recurrences the lesion appeared progressively more mature. At the time of discovery of the iliac bone teratoma there was no evidence of residual neck disease. The radiological and pathological characteristics, differential diagnosis, and clinical course are discussed.
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ranking = 1.5
keywords = neck
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18/337. Parotid lymph node metastasis from adenocarcinoma of the urachus.

    The parotid gland and its lymph nodes are frequent sites of metastases from head and neck cancers. However, metastasis from a distant primary below the clavicle is unusual. These originate from a variety of sites, most commonly the lung, kidney and breast. A case of a 59-year-old woman with parotid lymph node metastasis from an adenocarcinoma of the urachus, diagnosed on the basis of two discrete periparotid masses on CT and the patient's history, is presented.
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ranking = 0.5
keywords = neck
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19/337. Malignant triton tumor in the thoracic spine.

    We present a 15-year-old patient diagnosed with peripheral neurofibromatosis (NF-1), who was admitted with paraparesis caused by a large intrathoracic tumor with an intracanalicular component that affected the spinal cord. After surgery his condition improved, but a year later he suffered a relapse and died. Histologically the tumor was diagnosed as malignant with neurogenic and myogenic differentiation ("malignant triton tumor"). Malignant triton tumors (MTT) are infrequent; those found in the head and neck and the upper or lower extremities have a better prognosis than those in the retroperitoneum, buttock, or trunk. It is not clear whether this variation is due to a difference in tumor grade, stage, or resectability, or whether it is a consequence of therapy.
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ranking = 0.5
keywords = neck
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20/337. protein c deficiency in microvascular head and neck reconstruction.

    OBJECTIVE: To determine the incidence of perioperative protein c deficiency in patients undergoing free flap reconstruction of cancer-related defects in the head and neck. STUDY DESIGN: Prospective case series. INTERVENTION: Ten patients underwent microvascular reconstruction after surgical therapy of carcinomas of the oral cavity or oropharynx. Coagulation studies were determined in all patients 72 hours after surgery. SETTING: Academic tertiary care medical center RESULTS: protein c deficiency was detected in 70% of patients. One free flap failure was attributed to protein c deficiency. CONCLUSIONS: vitamin k-dependent clotting factors are frequently deficient during the postoperative period after major head and neck surgery, which may result in a state of hypercoagulability. protein c deficiency should be considered as a possible cause of free flap thrombosis in patients who undergo microvascular head and neck reconstruction.
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ranking = 3.5
keywords = neck
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