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Michelle Reid-Nicholson

Publications and source records attributed to Michelle Reid-Nicholson.

7 recordsLinked to original sources
PubMed2007

Atypical squamous cells, cannot exclude high grade intraepithelial lesion (ASC-H): does HPV matter?

The role of human papillomavirus (HPV) in cases diagnosed as atypical squamous cells, cannot exclude high squamous grade intraepithelial lesion (ASC-H) in cervical specimens is not well established. The objective of this study is to evaluate the role of HPV status in cases of ASC-H in a major cancer center. One hundred thirty-two patients with a diagnosis of ASC-H were identified over a 4-yr period in our institution. Forty-four of 132 cases were evaluated for high-risk HPV and had biopsy follow-up. The positive predictive value (PPV) of ASC-H for high-grade squamous intraepithelial lesions overall was 32% while PPV of ASC-H with associated HR HPV was 42%. This increase was statistically significant with P = 0.003 and suggest that HPV testing might be useful to increase the PPV of ASC-H.

Adolescent↗
PubMed2006

Immunophenotypic diversity of endometrial adenocarcinomas: implications for differential diagnosis.

Many endometrial adenocarcinomas, particularly those of endometrioid type, express estrogen receptors (ERs), progesterone receptors (PRs), and vimentin. This typical immunophenotype is frequently considered a standard against which others are compared when immunohistochemistry is used for differential diagnosis. We tested large numbers of endometrial cancers, enriched for high-grade tumors, to determine whether this reported immunophenotype was valid and whether expression differences between types of endometrial carcinoma could be exploited for diagnostic purposes. Immunohistochemical stains were performed on the following types of endometrial cancers using established methodology: International Federation of Gynecology and Obstetrics (FIGO) grades 1 and 2 endometrioid-42; FIGO grade 3 endometrioid-40; serous-24; clear cell-11; carcinosarcoma-9. In total, 92% of serous carcinomas expressed p16 strongly compared to weak-to-moderate expression of p16 in 7-67% of other tumors (FIGO grades 1 and 2 carcinoma and carcinosarcoma, respectively). A total of 84% of FIGO grades 1 and 2 carcinomas expressed ER compared to 9-54% of other tumors (clear cell and serous carcinomas respectively); 83% of FIGO grades 1 and 2 expressed PR compared to 11-54% of other carcinomas (carcinosarcoma and serous carcinoma, respectively). Most carcinomas were negative for monoclonal carcinoembryonic antigen (mCEA), and those that were positive showed mostly only focal membrane expression. Vimentin was expressed in nearly every tumor. Most tumors were diffusely vimentin positive, but a large range of expression patterns, from focal to diffuse and from weak to strong, was noted. Only 70% of FIGO grades 1 and 2 endometrioid carcinomas and 26% of grade 3 endometrioid carcinomas possessed the reportedly characteristic endometrial cancer immunophenotype p16 (-), ER (+), PR (+), mCEA (-), and vimentin (+). Endometrial cancers demonstrate substantial immunophenotypic diversity that remained apparent even within groups of similar histologic subtype and grade. ER, PR, and p16 expression was more illustrative of tumor type and degree of differentiation than they were of endometrial origin. In contrast, the vimentin-positive/CEA-negative phenotype remained the most constant among all endometrial cancers.

Adenocarcinoma, Clear Cell↗
PubMed2005

Subhepatic ciliated foregut cyst.

Foregut cyst derives from the primitive foregut and occurs in the tracheobronchial tree, mediastinum, liver, pancreas, tongue, and upper digestive tract. We report the first case of a foregut cyst in the subhepatic area. A computed tomographic scan of a 45-year-old man with dull backache showed a discrete subhepatic multiloculated cystic lesion. The cyst lining consisted of ciliated, columnar epithelium, goblet cells, and underlying double layer of smooth muscle. In addition to positivity for cytokeratin and epithelial membrane antigen in the epithelial cells, focal weak positivity for thyroid transcription factor was present, a novel finding further supporting respiratory differentiation. We hypothesized the occurrence of this cyst in this location based on the embryonic communication between the thoracic and abdominal cavities through the pericardio-peritoneal canal, eventually separated by pleuroperitoneal membranes. Abnormal buds off the tracheobronchial tree may get pinched off by these membranes, leading to migration into the abdomen.

Biomarkers↗
PubMed2004

Sarcomatoid carcinoma of the small intestine: a case report and review of the literature.

Sarcomatoid carcinoma of the small bowel is rare; to our knowledge, 19 cases have been reported to date in the English literature under several names. We report an additional case occurring in the jejunum of a 55-year-old man. The tumor was a polypoid 7.5-cm mass, which infiltrated the full thickness of the intestinal wall and the serosa of an adhesed loop of small bowel. On microscopic examination, the neoplasm was composed of sheets of spindle cells; focally, an anaplastic component was present, including tumor giant cells with bizarre nuclei. On immunohistochemical stains, tumor cells were positive for cytokeratin 7, cytokeratin AE1/AE3, vimentin, and focally, epithelial membrane antigen. No staining for cytokeratin 20 was found. Sarcomatoid carcinoma must be kept in mind in the differential diagnosis of malignant spindle cell tumors of the small bowel. As consensus regarding the terminology of these rare tumors is being reached, immunohistochemical stains are essential for accurate diagnosis.

Carcinoma↗
PubMedDate not supplied

Fine needle aspiration biopsy of primary mucinous carcinoma of the skin: a case report.

BACKGROUND: Primary mucinous carcinoma of the skin is a rare neoplasm of sweat gland origin. To date there are only 2 case reports in English describing its features on fine needle aspiration biopsy (FNAB). We describe an additional case and review the literature regarding this entity. To the best of our knowledge, this is the first reported case with a sentinel lymph node biopsy. CASE: A 78-year-old woman presented with a 3-cm left scalp mass at an outside institution. Following incomplete excision, multiple subcentimeter nodules developed in the skin adjacent to the biopsy site. FNAB of the nodules confirmed a recurrence of mucinous carcinoma. Clinical examination and extensive radiographic studies did not reveal primary disease elsewhere, thus supporting a diagnosis of primary mucinous carcinoma of the skin. At the time of wide excision of the residual tumor, sentinel lymph node biopsy revealed a single focus of micrometastasis. The patient declined adjuvant therapy and was disease free 6 months after the initial diagnosis. CONCLUSION: Cutaneous mucinous carcinoma is a tumor characterized by bland histocytologic features and abundant extracellular pools of mucin. Without a high index of suspicion, this rare entity may be overlooked or misdiagnosed. Numerous benign and malignant mucin-producing primary and secondary mimics exist, and immunohistochemistry offers limited benefits in differentiating them. Cytologic diagnosis of primary mucinous carcinoma of the skin is possible; however, correlation of clinical, radiologic and pathologic features is necessary to arrive at an accurate diagnosis.

Adenocarcinoma, Mucinous↗
PubMedDate not supplied

Infiltrating micropapillary carcinoma of the breast. Cytologic findings.

OBJECTIVE: To examine the cytologic features of infiltrating micropapillary carcinoma (IMPC). METHODS: Using the histopathology files of one of the authors (I.J.B.), we retrospectively identified 20 IMPC cases (pure, 12; partial micropapillary carcinoma differentiation, 8) with corresponding cytology. We evaluated the cases for cellularity, atypia, architecture and background. RESULTS: All cases were diagnostic of malignancy, characterized by atypical cells present predominantly in three-dimensional clusters and single cells, facilitating the diagnosis. The clusters had cell ball and papillarylike arrangements, like the morular growth pattern seen on histopathology. Apocrine cytology was present in 12 cases, focal mucin background in 5 and psamomma bodies in 2. The differential diagnosis includes primary papillary neoplasms of the breast, metastatic ovarian papillary serous carcinoma, apocrine and colloid carcinoma of the breast, and intraductal carcinoma (micropapillary type). CONCLUSION: As in histopathology, the cytologic features of IMPC are unique and should be recognized due to its aggressive behavior.

Adult↗