Neurilemoma of the medial plantar nerve: a case report and literature review.

A neurilemoma is an uncommon, benign, encapsulated neoplasm whose origin is derived from the Schwann cells. Its incidence in the foot is uncommon. A review of the literature, etiology, incidence, clinical presentation, histology, differential diagnosis, and treatment are discussed. The authors present a case of a neurilemoma of the medial plantar nerve of the foot.     

Intraosseous neurilemoma of the sternum.

Sternal benign bone tumor is uncommon. We report a very rare case of intraosseous neurilemoma in the sternum. A girl, 10 years of age, was diagnosed as having a sternal tumor. Computed tomographic scan disclosed a mushroom-shape tumor in the region from inside of the sternum to the ventral soft tissues. Surgical resection was performed. Histopathologic findings showed a typical neurilemoma with Antoni type A and B patterns. No recurrence has been found.     

A primary intracavitary right atrial neurilemoma.

Primary cardiac neurilemoma, a benign tumor, is extremely uncommon. To our knowledge only eight cases have been reported in the literature. We report a case of a 72-year-old man who presented with complaints of progressive shortness of breath and chest pain, seven years after a right nephrectomy for renal adenocarcinoma. An intra-right atrial tumor was surgically removed; the lesion was found to be a neurilemoma of the right atrium. This case report describes the surgical removal and rarity of neurilemomas, their predisposition to be right-sided in the heart and their coincidental association with other types of cancer.     

Neurilemoma of the medial plantar nerve: a case report.

The incidence of neurilemoma in the foot is uncommon. Neurilemoma of the medial plantar nerve distal to the tarsal tunnel, with symptoms isolated to the foot, is rare. A case presentation of neurilemoma arising from the distal portion of the medial plantar nerve that was identified and excised is presented with a 19-month follow-up.     

Femoral intraosseous neurilemoma

Summary The neurilemoma (benign schwannoma) is a benign tumor which arises from the Schwann cells of the peripheral nerves. In an intraosseous localization it is a very rare lesion, only forty cases being reported in the literature, and only two of these with the tumor located in the femur. This paper reports on a patient with a large neurilemoma in the lower part of the left femur.     

Benign schwannoma in the hepatoduodenal ligament: Report of a case

A 62-year-old woman with a large mass in the hepatic hilus underwent surgery. Histologically the tumor was predominantly composed of spindle-shaped cells with nuclear palisading and cells that stained positively for S-100 protein. The diagnosis was benign schwannoma (neurilemoma). The presence of lymphoid cuffing with lymphoid follicles in the capsule and xanthomatous change differed from conventional soft parts schwannoma and closely resembled benign schwannoma in the gastrointestinal tract.     

Benign intraparotid neurilemoma of the facial nerve

Parotid gland tumors are uncommon in children and intraparotid tumors of the facial nerve are even less so. It thus seems worthwhile to record this case of a neurilemoma of the right facial nerve within the parotid gland of a 14 yr old boy.     

Vagal schwannoma involving esophagus.

A rare case of vagal schwannoma (neurilemoma) with involvement of the distal esophagus is presented. Chronic progressive dysphagia was the only complaint related to the schwannoma. Barium swallow showed narrowing of the distal esophagus. The tumor was embedded in the wall of the esophagus. After biopsy and diagnosis of benign schwannoma, it was dissected from the esophageal muscle and mucosa. Diagnosis of benign schwannoma should be made before excision of the lesion to avoid an unnecessary esophagectomy.     

Cervicothoracic vagal neurilemoma: Report of a case

We report herein the rare case of a 45-year-old man with a cervicomediastinal neurilemoma of the vagus nerve. The tumor was 160×40×35 mm in size and extended from the angle of the right mandible to the aortic arch. Despite this being the largest such tumor ever reported, the patient presented without any symptoms. Thus, although vagal neurilemoma is uncommon, it should nevertheless be included in the differential diagnosis of any asymptomatic mass along the vagus nerve. In the evaluation of such masses, magnetic resonance imaging can provide useful information regarding not only the location, but also the nature of the lesion.     

Benign retroperitoneal neurilemoma without von Recklinghausen's disease: a rare occurrence

We describe a rare case of a primary retroperitoneal neurilemoma that was confused initially on ultrasonography and computerized tomography for a renal carcinoma. These tumors vary in vascularity on arteriography, are more often solid than cystic and usually are benign in the absence of von Recklinghausen's disease. The preferred treatment is wide surgical excision.     

A case of tracheal neurilemoma

A 54-year-old woman was admitted to our hospital with a complaint of cough and severe exertional dyspnea. Her pulmonary function was remarkably decline, especially forced expiratory volume in 1 second was 410 ml (28.7%). A chest X-ray film showed an abnormal shadow in the right tracheobronchial portion. Chest CT and MRI scans showed a 38 x 46 mm round tumor in the carina involving the lower trachea and right main bronchus. Bronchoscopic examination revealed a submucosal tumor which obstructed the orfice of the right main bronchus. Pathological examination of tissue obtained by open excisional biopsy revealed a benign neurilemoma. Then we performed a tumor extirpation with tracheal partial resection and the defect of tracheobronchial wall was repaired by direct suture. Postoperative course was uneventful and her pulmonary function was improved. The tracheobronchial neurilemomas are rare. In this report we discuss the therapeutic management of a neurilemoma of the trachea on the basis of 12 domestic cases reviewed.     

Tarsal tunnel syndrome: Four uncommon cases

Tarsal tunnel syndrome is rarely diagnosed. We describe four uncommon cases treated in our department: a case of angioleiomyoma of the tarsal tunnel never reported in the literature, a case of neurilemoma of the posterior tibial nerve, a big ganglion of the tibiotarsal joint and a pes planus with valgus talus in a young male affected by cerebral palsy. All the cases were treated by surgery with a good outcome. The article includes a discussion about aetiology, diagnosis and treatment of this syndrome.     

Primary tracheal schwannoma (neurilemoma) in a 9-year-old girl

The authors report a case of primary tracheal schwannoma (neurilemoma) causing symptoms of airway obstruction in a 9-year-old girl. Computerized tomography scan showed a polypoid intratracheal mass obstructing 73% of the lumen. Partial tracheal resection with primary anastomosis was performed. Histologic analysis showed a benign neurogenic tumor of Schwann cell origin.     

原发性腹膜后神经源性肿瘤93例分析

目的　探讨原发性腹膜后神经源性肿瘤的临床病理特征及外科治疗原则 ,以提高手术切除率及安全性。方法　回顾性分析 13年间经手术和病理证实的原发性腹膜后神经源性肿瘤患者的临床资料。结果　神经源性肿瘤占同期腹膜后肿瘤的 2 0 .6% (93 /4 5 2 ) ,其中神经鞘瘤 2 4例(2 5 .8% )、恶性神经鞘瘤 19例 (2 0 .4% )、副节瘤 14例 (15 .1% )、神经纤维瘤 16例 (17.2 % )、其他少见肿瘤 2 0例 (2 1.5 % )。术前CT和MRI检查的诊断率分别为 65 .6%和 73 .9%。手术切除率为97.9% (91/93 ) ,2例行探查活检。良、恶性肿瘤术后的 3 ,5年生存率分别为 95 .9% ,80 .1%和42 .4% ,10 .5 %。良性肿瘤术后复发 8例 ,复发率为 13 .1% ;恶性肿瘤复发 14例 ,复发率为 43 .8%。结论　CT和MRI对本病诊断有辅助意义 ;治疗首选手术切除。良性肿瘤预后良好 ,恶性肿瘤术后易复发     

Primary intratracheal neurilemoma

We report a case in a 38-year-old white woman of a benign primary intratracheal neurilemoma that recurred 12 years after an initial endoscopic excision. Of the 12 intratracheal neurilemomas that have previously been reported, all occurred in white persons in an age range of 6 to 71 years and most were located in the lower trachea and produced symptoms of cough and wheezing.     

Primary neurilemoma of the thyroid gland: Report of a case

Neurilemoma, like other non-epithelial tumors, seldom occurs in the thyroid gland. A 57-year-old man was first referred to our hospital with an asymptomatic anterior neck tumor. A solid tumor was detected in the right lobe of the thyroid and an enucleation of the thyroid tumor was performed. The tumor was 35×33×33 mm in size, and diagnosed as Antoni A type neurilemoma. We were only able to find seven previously reported detailed cases of primary neurilemoma of the thyroid gland. A review of these cases, however, revealed that neurilemoma tends to develop in the right lobe of the thyroid gland. An operation is thus considered necessary and an enucleation of the tumor is appropriate.     

Cauda equina compression associated with breast cancer. A case study in differential diagnosis

The determination of the etiology of spinal cord compression in cancer patients is essential for appropriate therapy. Patients with metastatic disease are not immune to the development of superimposed nonmalignant disease. Although metastatic epidural compression may occur in up to 9% of breast cancer patients, care must be taken to rule out other nonmetastatic lesions causing compression. The association of concurrent breast carcinoma and a spinal neurilemoma simulating a metastatic lesion seems not to have been previously reported. A neurilemoma was observed in a 50-year-old woman. A neurilemoma suspected to be a metastatic lesion may produce the clinical features of pain, neurologic deficit, and weakness. Differentiation will be aided by roentgenograms, radionuclide bone scans, computed tomography, and possible magnetic resonance imaging. Radiologic differentiation hinges on the recognition and the slow-growing nature and noninvasive boundaries of the nonmalignant lesion. Ultimate verification is by biopsy. Treatment should consist of neurectomy, if severely symptomatic, and stabilization as indicated.     

Isolated peripheral neurilemoma attached to the tendon of the flexor digitorum longus muscle

Neurilemomas are benign tumours arising from peripheral nerves with a Schwann cell sheath. They are normally painless and slowly growing, rarely causing motor disturbances. Neurilemomas are most common in the cranial nerves, in the trunk, the upper and lower extremities, but may appear anywhere. Especially rare are neurilemomas of the lateral peroneal nerve in the region of the fibular head and in the foot. We present the first detailed report of a neurilemoma localized between the Achilles tendon and the flexor digitorum longus muscle with separation of the tumour from the tibial nerve.     

A case of thoracic neurilemoma with neurilemomas of the upper limb and sacrum

A 64-year-old male was admitted in February 24, 1988 because of an abnormal shadow on chest X-ray. The tumor in the thoracic wall was removed at the thoracotomy and histology showed neurilemoma. Aspiration biopsy of tumors on the left upper limb and sacrum revealed the typical histopathologic appearance of neurilemomas. The possibility of malignant transformation and sequential appearance of tumors in patients with a neurilemoma indicates that complete resection and thorough follow-up examination are important.     

Renal parenchymal neurilemoma: a rare and unusual kidney tumor

We report a case of a neurilemoma arising from the renal parenchyma. Renal neurilemoma is an extremely rare tumor, with only 5 cases previously reported. Because so little is known of its natural history and potential for malignancy we recommend radical nephrectomy as the treatment of choice.