Sebaceous carcinoma (SC) is an uncommon neoplasm manifesting itself either in the eyelid or extraocularly in the head and neck area. Surgery is the standard of care. Irradiation is rarely proposed as monotherapy but is frequently administered as an adjuvant regimen following surgical resection. There is no known strategy concerning chemotherapeutic treatment in highly aggressive recurrent - or ...

S19 ENDOSCOPIC ULTRASOUND / VOLUME 6 / SUPPLEMENT 1 / AUGUST 2017 2.7 ± 1.7 cm. Most patients were asymptomatic. The type of cystic lesions was intraductal papillary mucinous neoplasm (IPMN; n = 35), serous cystadenoma (n = 18), mucinous cystic neoplasm (MCN; n = 12), solid pseudopapillary epithelial neoplasm (SPEN; n = 9), cystic degeneration of other tumors (n = 4), simple cyst (n = 4), infec...

Hemangiopericytoma is an uncommon mesenchymal neoplasm, first described by Stout and Murray in 1942. Hemangiopericytoma is considered to be a tumor of pericytes. Apart from being rare in absolute terms, hemangiopericytoma is uncommon in the head and neck. Most of the cases described till now are usually in the trunk or lower extremities.1 The incidence in head and neck region is less than 20%. ...

Extraskeletal myxoid chondrosarcoma (EMC) is a malignant soft-tissue neoplasm rarely described in the head and neck region of children and adolescents. We describe a case of EMC affecting the masticator space and a literature review. A 13-year-old boy who presented a large painless, diffuse mass causing progressive midfacial asymmetry of 6 months duration. Histopathological evaluation revealed ...

BACKGROUND Hemangiopericytoma (HPC) of the head and neck is a rare neoplasm whose biologic behavior is difficult to predict by means of conventional histologic parameters. METHODS H & E-stained sections from 12 cases of HPC were reviewed. Proliferation index was assessed using an immunoperoxidase stain for MIB-1 (Ki-67). RESULTS The study group consisted of 4 adult men, 5 adult women, and 1...

Merkel cell carcinoma is a rare and aggressive primary cutaneous neoplasm. Clinically it is characterized by innocuous appearance, as a fast growing asymptomatic nodule or plaque. Head and neck are the most common sites of presentation (50%). The treatment is based on local surgery completed with cervical lymph node dissection, radiotherapy, chemotherapy and other treatments depending on the st...

Diffuse large B-cell lymphoma (DLBCL) is a primary malignant B-cell lymphoid neoplasm. The bulk of the disease develops in the Waldeyer ring (palatine tonsils, nasopharyngeal adenoids, base of the tongue, and lingual tonsils). DLBCL accounts for more than 50% of all Waldeyer ring lymphomas, which in turn account for about 15% of all head and neck lymphomas and about 50% of all extranodal head a...

Head and neck sarcomas are relatively rare tumors, with angiosarcomas representing a small subset. Angiosarcoma is a malignant endothelial neoplasm characterized by atypical, multilayered, or solid endothelial proliferation with vasoformative architecture. The global incidence of irradiation-associated sarcoma is estimated as between 0.03% and 0.08%. Here we reported the case of an elderly woma...

Leiomyosarcomas are malignant tumors of smooth muscle origin. These tumors are very rare in the head and neck region. The majority of leiomyosarcomas of the head and neck arise in the paranasal sinuses, oral cavity, jaws and superficial soft tissues like the scalp. A mass was observed in the right temporoparietal region of the scalp of a 76-year-old female. Two years before presentation, the pa...