No abstract available.
Humans ; Mucin-1*

No abstract available.
Mucin-1* ; Poroma*

Two typical cases of epithelioid sarcoma were examined by immunohistochemical stain using antibodies to epithelial membrane antigen, carcinoembryonic antigen, vimentin and cytokeratin. Both cases showed positive reactivity for the four kinds of antibodies. These results point to the fact that epithelioid sarcoma simultaneously expresses epithelial markers and characteristic mesenchymal phenotypes. Epithelioid sarcoma appears to be a tumor derived from a multipotential mesenchymal cell with multidirectional differentiation.
Antibodies ; Carcinoembryonic Antigen ; Keratins ; Mucin-1 ; Phenotype ; Sarcoma* ; Vimentin

BACKGROUND: Although clinicopathologic characteristics of acral lentiginous melanoma (ALM) is well established, immunohistochemical study on ALM has rarely been reported. OBJECTIVE: Our purpose is to evaluate the usefulness of several immune markers in the diagnosis of ALM. METHODS: An immunohistochemical study was performed on paraffin sections of 20 ALMs using S-100 protein, HMB-45, vimentin, epithelial membrane antigen (EMA), and CAM 5.2. RESULTS: 1. Nineteen (95%) and 16 (80%) out of 20 ALM showed reactivity with S-100 protein and HMB-45, respectively. 2. Melanin bleaching was useful for diagnosing heavily pigmented ALM using both S-100 protein and HMB-45. 3. The immunoreactivity of S-100 protein and HMB-45 did not correlate with tumor thickness or level of invasion of ALM. The intensity of HMB-45 correlated well with the melanin content. 4. One and 2 out of 20 cases stained focally with EMA and CAM5.2 respectively, but these cases stained also with HMB-45 and/or S-100 protein. CONCLUSION: S-100 protein and HMB-45 were relatively sensitive markers for diagnosing ALM. Despite the occasional positivity for the epithelial markers in ALM, all epithelial marker-positive cases stained also with HMB-45 and/or S-100 protein. Therefore, S-100 protein and HMB-45 are very useful markers for diagnosing ALM.
Biomarkers ; Diagnosis ; Melanins ; Melanoma* ; Mucin-1 ; Paraffin ; S100 Proteins ; Vimentin

Microcystic meningioma is a rare variant of meningiomas. This unusual variant was originally described by Masson, who labeled it "humid". The computed tomographic scan or magnetic resonance images of these tumors resemble those of a glial or metastatic tumor with cystic or necrotic changes. There is no definitive method for differentiating cystic meningiomas from these more common tumors. But immunohistochemically, they share a similar pattern of positive staining for epithelial membrane antigen and vimentin with other meningiomas. Our case was a 34-year-old woman with a tumor mass on the right frontal area. She was admitted to hospital because of generalized tonic seizure. Grossly all of the tumor could be removed, and histopathologically this tumor was revealed to be a microcystic meningioma.
Adult ; Female ; Humans ; Meningioma* ; Mucin-1 ; Seizures ; Vimentin

BACKGROUND: Mucin (MUC)1 and MUC4 (MUC1, 4) are high molecular weight glycoproteins expressed in normal and malignant epithelial cells, and these expressions are related to the prognosis of some carcinomas. In non-small cell lung carcinoma (NSCLC), the relationship between MUC1, 4 expressions and their prognostic significance is not well known. We evaluated these relationships in a series of NSCLC: 1) between MUC1, 4 expression levels and histologic subtypes, and 2) between high expression of MUC1, 4 and their prognostic significance. METHODS: We performed immunohistochemical staining for MUC1, 4 in paraffin-embedded tissues from 165 NSCLC cases arranged in a tissue microarray. RESULTS: We found a significant correlation between MUC1, 4 expressions and NSCLC histologic subtypes (p < 0.05). High MUC1 expression was characteristic of adenocarcinoma. Low MUC1, 4 expressions were characteristic of squamous cell carcinoma. In adenocarcinoma, we found significant association between diffuse MUC1 expression and short patient survival (p = 0.005). In squamous cell carcinoma, diffuse MUC4 expression showed long patient survival trend (p = 0.128). CONCLUSIONS: MUC1, 4 expression levels were significantly correlated with NSCLC histologic subtypes. Diffuse MUC1 expression was significantly associated with shortened survival in NSCLC patients, especially in adenocarcinoma.
Adenocarcinoma ; Carcinoma, Squamous Cell ; Epithelial Cells ; Glycoproteins ; Humans ; Lung ; Molecular Weight ; Mucin-1 ; Mucin-4 ; Mucins ; Prognosis

Palisaded encapsulated neuroma(PEN) is a rare intraneural neuroma. It usually occurs as a solitary, asymptomatic, skin-colored papule, and commonly affects the butterfly area of the face of middle-aged adults. However, it rarely involves oral mucosa including lip and should be differentiated from mucosal neuromas which generally occur as multiple small nodules of the lips and the anterior part of the tongue. We report a case of PEN occurring on the lower lip in a 33-year-old male. Histopathologically, it appeared as a well-circumscribed, encapsulated round nodule in the dermis. The nodule was composed of well-developed fascicles of wavy spindle cells separated by a loose matrix. Nuclear palisades were ill defined. On immunohistochemical staining, most tumor cells of the nodule were positive for S-100 protein and about 30% of tumor cells were positive for neural filament, but the capsule was negative for them. Epithelial membrane antigen was focally and discontinuously reactive on the capsule of the nodule.
Adult ; Butterflies ; Dermis ; Humans ; Lip* ; Male ; Mouth Mucosa ; Mucin-1 ; Neuroma* ; S100 Proteins ; Tongue

Nodular hidradenocarcinoma was first reported as a clear-cell papillary carcinoma by Liu et al. in 1949. With a potential for uncontrollable local recurrence, it tends to metastasize and often causes death. We report a case of a 68-year-old man with nodular hidradenocarcinoma on the left preauricular area. Histopathology of the tumor showed a multilobulated intradermal mass. In the tumor nodule, there were many cystic spaces of various sizes, resulting from tumor necrosis. The tumor consisted of large, atypical, polygonal cells with eosinophilic cytoplasm, and clear cells with clear cytoplasm. Numerous mitoses were evident. We obtained positive results from an immunohistochemical study with antibodies to cytokeratins, epithelial membrane antigen, and PAS. The patient was treated with a wide local excision. However, we observed a recurrence one month later and performed a wide excision and local skin flap. There has been no evidence of recurrence or metastasis for six months after the second excision.
Aged ; Antibodies ; Carcinoma, Papillary ; Cytoplasm ; Eosinophils ; Humans ; Keratins ; Mitosis ; Mucin-1 ; Necrosis ; Neoplasm Metastasis ; Recurrence ; Skin

Palisaded, encapsulated neuroma is characterized clinically by a solitary, slowly-growing and dome-shaped papule or nodule, usually accompanied by telangiectasia on the surface, and histopathologically by an encapsulated nodule in the dermis and the palisading arrangement of nuclei. A 57-year-old female patient presented with a 1cm-sized, solitary nodule on the right ala nasi which had been present for about 5 years. The nodule had a tendency to slow growth and it became a polypoid nodule. Telangiectasia was shown on the surface of the lesion. Histopathlogical findings showed a well-defined and encapsulated nodule in the dermis, composed of spindle cells with basophilic and plump nuclei in a palisading fashion. On immunohistochemical staining, the tumor cells of the nodule were positive for S-100 protein, while the capsule of the nodule was negative for S-100 protein. Epithelial membrane antigens were focally positive only on the capsule of the nodule. We report herein a case of palisaded, encapsulated neuroma, one case of which has been reported in Korea.
Basophils ; Dermis ; Female ; Humans ; Korea ; Middle Aged ; Mucin-1 ; Neuroma* ; S100 Proteins ; Telangiectasis

We report a case of trichilemmal catcinoma in a 79-year-old woman presentde an atrophic scar remaining after excision of a recurrent nodule on the right mandibular area, Her past history revealed that there had been a painful pea-sized brownish nofule on the same site for two years. Eleven months before presentation, it had been excised but recurred 9 months later. Histopathologic findings showed a clear cell neoplasm with trichilemmal keratinization. The tumor cells showed PAS-positive cytoplasm and cytologic atypia with a few mitoitic figures. Immunohistochemical staining for high molecular weight cytokeratin was positive but carcinoembryonic antigens and epithelial membrane antigens were all negative. To our knowledge this is the first report of trichilemmal carcinoma in Korea.
Aged ; Carcinoembryonic Antigen ; Cicatrix ; Cytoplasm ; Female ; Humans ; Keratins ; Korea ; Molecular Weight ; Mucin-1