U Humer-Fuchs | PubMed Health

PubMed1998

Synovial sarcoma of the parapharyngeal space: CT and MRI.

We present the CT and MRI findings of a histologically proven synovial sarcoma arising in the left parapharyngeal space of a 21-year-old man. CT was useful for confirming the presence of calcification within the tumour, which may be a favourable prognostic sign, and in excluding involvement of cortical bone. The CT and MRI findings were, however, nonspecific. MRI was superior to CT for assessing the topographical relationships of the tumour to the vessels and the invasion of neighbouring structures.

Adult↗

PubMed1998

Cavernous haemangioma in the infraorbital nerve canal--an unusual expansion in the maxillary sinus.

A patient with a four-week history of hypaesthesia and recurrent swelling of the cheek in the left infraorbital region presented with a computed tomography (CT) scan demonstrating an expansion in the infraorbital nerve canal, thought to be a neuroma. The tumour was surgically removed without complications and no bleeding. Histopathological investigation showed a partially thrombosed cavernous haemangioma. To our knowledge, after reviewing the literature, this is the first report of a cavernous haemangioma in the infraorbital nerve canal.

Facial Neoplasms↗

PubMed1997

Simultaneous occurrence of metastatic tonsillar squamous cell carcinoma and angioimmunoblastic T-cell lymphoma in a cervical lymph node.

Non-Hodgkin's lymphoma (NHL) is a frequent head and neck malignancy. Squamous cell carcinoma of the tonsil is the second most common head and neck carcinoma. We report a case of a tonsillar carcinoma metastasis in an angioimmunoblastic-transformedlymph node. To our knowledge this is the first description and histopathological documentation of such a case in the literature.

Carcinoma, Squamous Cell↗

PubMed1997

Cutaneous leiomyosarcoma.

We report the clinical, histopathologic, immunohistologic, and prognostic findings in 19 patients with cutaneous leiomyosarcoma, eight males and 11 females (mean age, 66 years; age range, 41-93 years). The tumors presented mainly as solitary lesions and were located on the head and neck (eight lesions), trunk (four lesions), upper extremities (three lesions), and lower extremities (four lesions). Histopathologically, two predominant growth patterns were observed: nodular (12 cases) and diffuse (seven cases). Neoplasms with a nodular growth pattern were characterized by high cellularity and prominent nuclear atypia, and they showed conspicuous mitoses, several necrotic cells, and sometimes extensive necrotic areas. By contrast, most cutaneous leiomyosarcomas with a diffuse growth pattern revealed low cellularity, well-differentiated smooth muscle cells, inconspicuous mitotic figures, and few or no necrotic cells. Immunohistologic investigations revealed all cutaneous leiomyosarcomas to express vimentin and smooth muscle actin. Pan-muscle actin (HHF-35) was also expressed in most cases (15 lesions). However, only 12 lesions showed positive staining for desmin. Remarkable was the expression of cytokeratins in five lesions. Clinical follow-up revealed local recurrences in five patients (three cases with nodular pattern and two lesions with a diffuse pattern) after a period ranging from 8 months to 3 years after surgical excision. No distant metastases have been observed in our series. We conclude that cutaneous leiomyosarcoma with a diffuse growth pattern may constitute a pitfall in histopathologic diagnosis because of the presence of only subtle criteria for malignancy. Cutaneous leiomyosarcoma may show different immunophenotypes, thus emphasizing the importance of using a large panel of antibodies (smooth muscle actin, HHF-35, desmin, vimentin, cytokeratins, and S-100 protein) in immunohistologic diagnosis. Cutaneous leiomyosarcoma sometimes reveals local recurrences, but it has negligible potential for distant metastases.

Actins↗