Search PubMed⌕ Search

Biomedical subjects

Ehab Y Hanna

Publications and source records attributed to Ehab Y Hanna.

9 recordsLinked to original sources
PubMed2007

Surgical wound complications after intensive chemoradiotherapy for advanced squamous cell carcinoma of the head and neck.

OBJECTIVE: To define the rate of complications from surgery following intensive chemoradiotherapy in patients with advanced squamous cell carcinoma of the head and neck. DESIGN: The medical records of 131 consecutive patients treated with a combination of chemotherapy and radiation therapy for head and neck squamous cell carcinoma from 1995 through 2002 were reviewed. Thirty-eight patients underwent 50 surgical procedures. Thirty-seven neck dissections were performed either for persistent disease, initial neck stage N2 or greater, recurrent disease, or electively as part of salvage surgery for the primary site. Thirteen salvage operations were performed for persistent or recurrent disease at the primary site. SETTING: Academic tertiary care referral center. PATIENTS: A total of 131 consecutive patients treated with a combination of chemotherapy and radiation therapy for head and neck squamous cell carcinoma (mean age at diagnosis, 53 years). MAIN OUTCOME MEASURE; Rate of complications from surgery. RESULTS: Wound complications occurred in 4 (11%) of 38 patients and 5 (10%) of 50 procedures. Major wound complications occurred in 3 (8%) of 38 patients. Minor wound complications occurred in 2 patients (5%). CONCLUSION: Surgery can be safely performed after intensive chemoradiotherapy.

Carcinoma, Squamous Cell↗
PubMed2005

Genetic analysis of sinonasal adenocarcinoma phenotypes: distinct alterations of histogenetic significance.

Sinonasal adenocarcinomas, a relatively rare entity, are composed of distinctly different morphologic subtypes with variable biological behavior. To investigate the genetic events associated with their development and clinicopathologic features, we analyzed the alterations in K-ras, APC, beta-catenin, hMLH1 and hMSH2 and p53 genes expression in a cohort of 15 primary tumors comprising the two main sinonasal adenocarcinoma subtypes (enteric and seromucinous). The patients consisted of 13 men and two women, who ranged in age from 50 to 87 years. Tumors were predominantly located in the ethmoid sinus. Eight tumors were Enteric-type, and seven were seromucinous type. Nine patients were smokers and four were nonsmokers; and no information was available on two patients. Two of the eight enteric-type, had K-ras mutation at codons 12A and 12B, and one showed microsatellite instability at BAT-25. Two patients with enteric-type tumors had a history of wood-dust exposure, and one had a K-ras mutation at 12A codon as well as p53 overexpression. No patients with the seromucinous type had any genetic abnormalities, except for overexpression of p53 in two tumors. Our results show that (1) a subset of enteric-type sinonasal adenocarcinoma shares certain genetic alterations with colonic adenocarcinomas, (2) the seromucinous-type sinonasal adenocarcinoma lacks alterations and may develop through a different pathway, (3) high p53 expression is associated with aggressive tumor features in both subtypes and (4) the enteric-type runs a more malignant course than the seromucinous counterpart.

Adaptor Proteins, Signal Transducing↗
PubMed2003

Stereotactic radiosurgery for patients with cancer of the head and neck.

Patients with recurrent cancer of the head and neck involving the base of the skull have limited treatment options. Stereotactic radiosurgery is currently being investigated as a viable modality of treatment for these patients. This paper reviews the basic principles and treatment procedures involved in stereotactic radiosurgery, as well as published reports on its use with these patients. Finally, questions to be addressed by future studies for clarification of the role of this technology are outlined.

Dose Fractionation, Radiation↗
PubMed2003

Well-differentiated carcinoma of the thyroid.

Thyroid cancer will be diagnosed in more than 20,000 individuals in the United States in 2002. Approximately 16,000 of these patients will be women. During the same year, an estimated 1300 deaths from thyroid cancer are expected. The various types of thyroid cancer include papillary carcinoma, follicular carcinoma, Hurthle cell carcinoma, medullary carcinoma, anaplastic carcinoma, and thyroid lymphoma. Papillary, follicular, and Hurthle cell carcinoma are considered well-differentiated thyroid cancers and constitute the focus of this article.

Adenocarcinoma, Follicular↗
PubMed2003

Induced expression of syndecan-1 in the stroma of head and neck squamous cell carcinoma.

Syndecan-1 (CD138), a cell-surface heparan sulfate proteoglycan, is involved in cell-cell, cell-matrix interaction and growth factor binding. Loss of expression of syndecan-1 in tumor cells leads to decreased intercellular cohesion, increased potential for tumor invasiveness, and metastatic spread. Furthermore, induction of syndecan-1 expression in the tumor stroma has been postulated to promote tumor angiogenesis via its binding to growth factors such as basic fibroblast growth factor. Although syndecan-1 expression within tumor cells has been investigated in head and neck squamous cell carcinoma, stromal expression has not been studied in detail. We analyzed 38 cases of head and neck squamous cell carcinoma by immunohistochemical staining for syndecan-1 expression within the stroma. The expression of syndecan-1 within tumor cells of various histologic grades of differentiation, squamous cell carcinoma in situ cells, and benign squamous epithelium was also determined. Variable levels of diminished syndecan-1 expression were noted within the dysplastic cells of 9 of 16 (60%) squamous cell carcinoma in situ lesions and in all 38 (100%) invasive squamous cell carcinoma. In general, higher levels of syndecan-1 expression were observed in the well-differentiated tumors, in contrast to significant reduction of expression seen in poorly differentiated tumors. Syndecan-1 expression was observed within the stroma (in fibroblasts) surrounding infiltrating carcinoma cells in 28 of 38 (74%) cases. The intensity of syndecan-1 staining within the stroma showed generally an inverse correlation with the degree of tumor cell differentiation. Syndecan-1 expression was not detected in the stroma beneath normal squamous epithelium or adjacent to areas of squamous cell carcinoma in situ. We conclude that induced expression of syndecan-1 in the stroma surrounding tumor cells of invasive head and neck squamous cell carcinoma is a frequent event. The increased stromal syndecan-1 expression, coupled with its loss from the surface of carcinoma cells, may contribute to tumor cell invasion and the development of metastases.

Aged↗
PubMed2002

Fine-needle aspiration cytology of a primary ectopic meningioma.

Meningiomas are benign tumors derived from arachnoid cells. Most commonly an intracranial lesion, meningiomas may be found extracranially in various anatomic sites. A 23-yr-old white female presented with left-sided palpable mass located submucosally in the floor of the mouth. CT scan revealed no evidence of mass elsewhere in the head and neck region. Fine-needle aspiration cytology (FNAC) showed loose and cohesive cellular fragments with lobular growth pattern and uniform round or ovoid cells. The diagnosis of low-grade salivary gland neoplasm, not further classified, was made. The tumor was locally excised. The differential diagnoses of an extracranial meningioma and pleomorphic adenoma were discussed at the frozen section. Based on light microscopic, immunohistochemical, and electron microscopic (EM) findings, the final diagnosis of an ectopic meningioma was rendered. Ectopic meningiomas may pose a diagnostic challenge to clinicians and cytopathologists. It is easily forgotten in the list of differential diagnosis at an ectopic site. Primary ectopic meningioma in a region containing salivary gland(s) may mimic benign and low-grade malignant salivary gland tumors in FNAC.

Adenoma↗