ABSTRACT
Mixed squamous cell carcinoma and papillary carcinoma in the thyroid gland is a very rare malignant tumor characterized by rapidly progressive clinical course and radioresistance. A 63-year-oid woman had mixed squamous cell carcinoma and papillary carcinoma in the thyroid gland diagnosed by fine needle aspiration cytology (FNA), and the diagnosis was confirmed by histological examination. She had complained of a fixed, egg-sized mass of the anterior neck with hoarseness for 1 year. The findings of FNA consisted of sheets and clusters of polygonal epithelial cells with hyperchromatic, pleomorphic nuclei and eosinophilic, abundant, laminated cytoplasm. These findings were consistent with squamous cell carcinoma. Also, foci of papillary carcinoma were noted, and the cells exhibited nuclear groovings and intranuclear cytoplasmic inclusions. Total thyroidectomy specimen showed a diffusely infiltrating tumor in the left thyroid which was composed of mixed papillary carcinoma and well-differentiated squamous cell carcinoma. In junction between two components, squamous metaplasia of papillary carcinoma was noted.
Subject(s)
Child , Female , Humans , Biopsy, Fine-Needle , Carcinoma, Papillary , Carcinoma, Squamous Cell , Cytoplasm , Diagnosis , Eosinophils , Epithelial Cells , Giant Cell Tumors , Giant Cells , Glomerulosclerosis, Focal Segmental , Hoarseness , Inclusion Bodies , Metaplasia , Neck , Ribs , Thyroid Gland , ThyroidectomyABSTRACT
Multinucleated giant cells (MGCs) are a prominent characteristic of granulomatous inflammation including tuberculosis. The present study was performed to investigate the characteristics and distribution pattern of intracellular and cell surface glycoconjugates of the MGCs in human pulmonary tubercles using lectin histochemistry. The cytoplasmic staining patterns could be divided into three groups. First, VVL, LCA and SBA showed intense reactivity in the great majority of the MGCs. Second, BS -I, DBA, WGA, PNA, ECL, PHA -L and PHA -E also showed positive staining in the cytoplasm of many MGCs, but the reaction patterns were not uniform. Third, the other group (BS -I - B4 and UEA -I) exhibited very weak or no staining in the cytoplasm. With regard to the membranous staining, the lectin binding patterns could be divided into two groups. First, WGA, ECL, PHA -L & PHA -E showed intense membranous staining. Second, the other lectins (BS -I, BS -I -B4, DBA, VVL, LCA, PNA, SBA and UEA -I) did not show any membranous staining. There was no significant difference in lectin binding patterns between the two types of MGCs. Our results demonstrated the characterization of glycoconjugates expressed in the MGCs in human pulmonary tubercles.
Subject(s)
Humans , Cytoplasm , Giant Cells , Glycoconjugates , Inflammation , Lectins , Tuberculosis , Tuberculosis, PulmonaryABSTRACT
Malignant tumors of the breast which contain stromal osteoclast-like, multinucleated giant cells are a rare entity of yet unknown clinical significance. These benign multinucleated giant cells are known to occur mostly in areas of prominent angiogenesis and in close association with tumor cells. Supplementary immunohistochemical and electronmicroscopic examinations indicate that the multinucleated giant cells are of histiocytic origin. We report on a case of infiltrating ductal carcinoma with stromal osteoclast-like multinucleated giant cells occurring in the right breast of a 37 year-old woman. Grossly, the tumor was characterized by a well-circumscribed dark brown, solid firm mass. Microscopically, multinucleated giant cells were found in the stroma intermingled with malignant tumor cells. The stroma showed only a small amount of mononuclear cell infiltration and a moderate degree of vascular proliferation. Immunohistochemical stains revealed the tumor cells to be positive for carcinoembryonic antigen, epithelial membrane antigen and cytokeratin while the multinucleated giant cells were positive for vimentin, CD68 and negative for all other stains tested. Ultrastructurally the multinucleated giant cells differed from tumor cells by having abundant cytoplasmic organelles such as rough endoplasmic reticulum, lysosomes, ribosomes, and vesicles but lacking desmosomes or other types of intercellular junctions. Other characteristic features of multinucleated giant cells included, indented nuclei and prominent cytoplasmic process.
Subject(s)
Female , HumansABSTRACT
Both dimethyl methylphosphonate (DMMP) and trimethylphosphate (TMP) are organophosphorous compounds that can evoke sterility in male rodents. The following studies examined the pathology of reproductive organ, especially on the testis, by light microscopy after treatment with both agents. Adult male rats were treated per oral with DMMP, 1,750 mg/Kg, for up to 12 weeks and per oral with TMP, 400 mg/Kg for up to 5 weeks. After 5 weeks of treatment with DMMP there were occasional multinucleated giant cells composed of late spermatids in stages X, XI, XII as well as cytoplasmic vacuolation of Sertoli cell. Anachronistic spermiations were seldom, if ever, seen throughout the experiment. After 7 weeks of DMMP those were markedly diminished. The overall changes after treatment with TMP are somewhat similar to those treated with DMMP. The major changes were composed of aggregate of multinucleated giant cells and maturation arrest at spermatid level, which appear immediately after administration of TMP. The peak frequency in the emergence of multinucleated giant cells in treatment with TMP was noted just a week after treatment, but afterwards declined. Maturation arrest was prominent after 3 weeks in the cases treated with TMP.