The origins of medullary carcinoma and papillary carcinoma of thyroid are embryologically different. We report a case of simultaneous occurrence of medullary carcinoma and papillary carcinoma of the thyroid in the same thyroid gland. In this case, the occurrence of the two tumors may be a coincidence, does not have embryological or genetical significance.
Carcinoma, Medullary ; Carcinoma, Papillary* ; Thyroid Gland*

Hyalinizing trabecular adenoma of the thyroid gland is a distinctive benign epithelial lesion exhibiting a prominent trabecular arrangement and stromal hyalinization. We recently recognized a hyalinizing trabecular adenoma of the thyroid that displayed potentially misleading features of papillary and medullary carcinomas. However the immunohistochemical features, i.e. thyroglobulin-positive and calcitonin-negative as well as its trabecular arrangement and surrounding abundant hyaline materials confirmed our diagnosis.
Adenoma* ; Carcinoma, Medullary ; Diagnosis ; Hyalin* ; Thyroid Gland*

Carcinoma, Medullary ; pathology ; Duodenal Neoplasms ; pathology ; Humans

No abstract available.
Biopsy, Fine-Needle* ; Carcinoma, Medullary* ; Thyroid Gland*

Most medullary thyroid carcinomas show suspicious malignant features such as hypoechogenicity, a spiculated margin and/or intranodular calcifications, which are well known features of papillary carcinoma. We report here on a case of medullary carcinoma that was seen as a predominantly cystic thyroid mass on ultrasonography. This type of case is not common in the literature and we discuss the way to diagnose a medullary thyroid carcinoma.
Carcinoma, Medullary ; Carcinoma, Papillary ; Neck ; Thyroid Gland ; Thyroid Neoplasms

Medullary carcinoma(MC) of the breast is an uncommon histologic form of infiltrating ductal carcinoma and the cytologic features of MC are not well delineated.
Biopsy, Fine-Needle* ; Breast* ; Carcinoma, Ductal ; Carcinoma, Medullary*

PURPOSE: Reclassfication of the medullary carcinoma using a strict histologic criteria and analysis of the clinical and pathological characteristics of the medullary carcinoma. MATERIAL & METHODS: Thirty-seven cases of the breast carcinoma originally diagnosed as medullary carcinoma were reviewed. One to ten microscopic slides of each case were reexamined and reclassified using the strictly defined histologic criteria defined by Ridolfi et al. Tumors were excluded from the category of the typical medullary carcinoma (TMC) on the basis of presence of glandular features, focal marginal infiltrations, or sparse mononuclear infiltrations. Tumor with two or more atypical features, or extensive marginal infiltrations, no mononuclear cell infiltration and/or less than 75% syncytial growth were classified as infiltrating ductal carcinoma with medullary feature (IDC). A predominantly syncytial growth pattern (75% or more) was requisite for inclusion in both TMC and atypical medullary carcinomas (AMC). RESULTS: Twenty-two tumors (60%) fulfilled the criteria for TMC, and 12 tumors (32%) were AMC and three tumors (8%) were IDC. TMC occupied 3.1% of breast cancer. The mean age of patients with TMC was 45.4+/-11.2 years and the average size of the tumor in TMC was slightly larger than that of breast cancer in general, although not statistically significant. The frequency of lymph node metastasis in TMC was similar to breast cancer in general. Five year survival of patients with TMC was 95.5% which was significantly better than breast cancer in general. CONCLUSION: The TMC occupied 3.1% of breast cancer. The mean age of patient, tumor size and lymphnode metastasis were not different from that of breast cancer but 5 years survival of patient with TMC was significantly better than breast cancer in general.
Breast ; Breast Neoplasms ; Carcinoma, Ductal ; Carcinoma, Medullary* ; Humans ; Lymph Nodes ; Neoplasm Metastasis

BACKGROUND: Follicular neoplasm (FN) or Hurthle cell neoplasm (HN) is a less well understood pitfall when evaluating thyroid nodule with fine-needle aspiration (FNA). This study aimed to determine the rates of malignancy and the predictive factors for malignancy in thyroid nodules with a cytological diagnosis of FN or HN. METHODS: The patients who were cytologically diagnosed as having FN or HN after FNA between 1995 and 2004 at Asan Medical Center were included in this study. We collected the pathology data until 2009 and we analyzed the clinical characteristics associated with malignancy. RESULTS: A total 478 patients were cytologically diagnosed as having FN or HN during the study period and 327 (68%) among them underwent thyroid surgery. Thyroid malignancy was confirmed in 157 (48%) of 327 patients. Malignancy was confirmed in 124 patients with FN (124/253, 49%). They were 48 papillary, 65 follicular, 7 Hurthle cell and 3 medullary carcinomas and 1 anaplastic carcinoma. The malignancy in the cases of HN (33/71, 44.6%) was 9 papillary, 4 follicular and 20 Hurthle cell carcinomas. The risk of malignancy was not associated with male gender, a larger tumor size (> 4 cm) or the diagnosis of HN. However, an age below 20 years (RR 3.6, P = 0.03) and above 60 years (RR 2.3, P = 0.04) was associated with an increased risk of malignancy. CONCLUSION: About half of the patients with FN or HN on FNA cytology were diagnosed as having thyroid cancer after surgery. The malignancy rate for the cytologic diagnosis of HN was similar to that for FN. Thyroid surgery should be recommended for this situation, and especially for patients younger than 20 years or older than 60 years.
Biopsy, Fine-Needle ; Carcinoma ; Carcinoma, Medullary ; Humans ; Male ; Thyroid Gland ; Thyroid Neoplasms ; Thyroid Nodule

Lymphoepithelioma-like carcinoma (LELC) of the uterine cervix, also called lymphoepithelioma or medullary carcinoma, is a very rare variant of squamous cell carcinoma. Histologically, the tumor is characterized by groups and nests of poorly differentiated tumor cells with abundant cytoplasm and ill-defined cell borders, surrounded by an intense chronic inflammatory infiltrate. Epstein-Barr virus (EBV) may be involved in the development of LELC but the exact role remains unclear. The relationship between human papillomavirus (HPV) and LELC of the uterine cervix has also not been reported. The prognosis of LELC of the uterine cervix seems to be better than that of cervical squamous cell carcinoma. We report a case of LELC of the uterine cervix with a brief review.
Carcinoma, Medullary ; Carcinoma, Squamous Cell ; Cervix Uteri ; Cytoplasm ; Female ; Herpesvirus 4, Human ; Humans ; Prognosis

Lymphoepithelioma-like carcinoma (LELC) of the uterine cervix, also called lymphoepithelioma or medullary carcinoma, is a very rare variant of squamous cell carcinoma. Histologically, the tumor is characterized by groups and nests of poorly differentiated tumor cells with abundant cytoplasm and ill-defined cell borders, surrounded by an intense chronic inflammatory infiltrate. Epstein-Barr virus (EBV) may be involved in the development of LELC but the exact role remains unclear. The relationship between human papillomavirus (HPV) and LELC of the uterine cervix has also not been reported. The prognosis of LELC of the uterine cervix seems to be better than that of cervical squamous cell carcinoma. We report a case of LELC of the uterine cervix with a brief review.
Carcinoma, Medullary ; Carcinoma, Squamous Cell ; Cervix Uteri ; Cytoplasm ; Female ; Herpesvirus 4, Human ; Humans ; Prognosis