Orbital infantile myofibroma: a case report and clinicopathologic review of 24 cases from the literature.

Isolated orbital infantile myofibroma are rare tumors in the head and neck. The mass-like clinical presentation and variable histologic features result in frequent misdiagnosis and potentially inappropriate clinical management. There are only a few reported cases in the English literature.

Olfactory neuroblastoma.

Few neoplasms are unique to the sinonasal tract, but sinonasal undifferentiated carcinoma and olfactory neuroblastoma are malignant tumors which require unique management. Due to the rarity of these tumors, practicing pathologists are not always aware of their distinctive clinical, radiographic, histologic, immunohistochemical, and molecular features. These cases are frequently submitted for consultation, further suggesting the diagnostic difficulties inherent to these tumors.

Compound odontoma.

A case of compound odontomas of the anterior maxilla is discussed. Multiple tooth like structures were discovered upon surgical excision.

Primary paraganglioma of the parathyroid: a case report and clinicopathologic review.

Paragangliomas are relatively uncommon neoplasms that arise in adrenal and extra-adrenal paraganglia of the autonomic nervous system. Parasympathetic paraganglioma develop predominantly in the head and neck. It is exceedingly uncommon to develop a primary intraparathyroid paraganglioma.

Intradural, extramedullary spinal cord granular cell tumor: a case report and clinicopathologic review of the literature.

Granular cell tumor (GCT) of the spine is uncommon, with intradural extramedullary location being exceptionally rare. The non-specific clinical presentation and variable histologic patterns can make recognition of this tumor challenging. Two previous reports of GCT of the spine were reviewed (Medline 1960-2009) and analyzed with respect to this case report.

Primary extracranial meningiomas: an analysis of 146 cases.

Primary extracranial meningiomas are rare neoplasms, frequently misdiagnosed, resulting in inappropriate clinical management. To date, a large clinicopathologic study has not been reported. One hundred and forty-six cases diagnosed between 1970 and 1999 were retrieved from the files of the Armed Forces Institute of Pathology.

Ceruminous gland carcinomas: a clinicopathologic and immunophenotypic study of 17 cases.

Background: Ceruminal gland carcinomas are rare neoplasms confined to the skin lining the cartilaginous part of the external auditory canal.

Design: Retrospective.

Results: The patients included 11 men and 6 women, aged 33-82 years (mean, 59.

Malacoplakia of the tongue: a case report and clinicopathologic review of 6 cases.

Background: Extra-urogenital tract malacoplakia is uncommon, with tongue malacoplakia being exceptionally rare. The nonspecific clinical presentation and variable histologic patterns can make recognition of this lesion and separation from other lesions challenging. There are only a few reported cases in the English literature.

Epstein-Barr virus and human herpes virus-8 are not associated with juvenile nasopharyngeal angiofibroma.

Background: Nasopharyngeal angiofibroma (also known as juvenile nasopharyngeal angiofibroma) is a rare fibroblastic tumor with a vascular component that occurs in the nasopharynx and posterolateral nasal wall of adolescent boys. The etiology of nasopharyngeal angiofibroma remains elusive. This investigation was undertaken to determine if human herpes simplex virus-8 and Epstein-Barr virus are possible etiologic viruses and to determine if they have any association with the age of the patient and/or the proliferative state of the lesion.

Solitary fibrous tumor of the larynx.

Background: True mesenchymal, non-cartilaginous neoplasms of the larynx are rare. Extrapleural solitary fibrous tumor (SFT) is a localized neoplasm characterized by proliferation of thin-walled vessels and collagen-producing cells and is considered within the "hemangiopericytoma-solitary fibrous tumor" spectrum. SFT primary in the larynx is exceptional.