ABSTRACT
BACKGROUND: Transforming growth factor-(TGF-alpha) is a acidic, heat-stable, 50 amino acid polypeptide which is related to cellular proliferation, malignant transformation, and angiogenesis. There are many similarities between keratoacanthoma(KA) and squamous cell carcinoma(SCC). So, it is often difficult to differentiate keratoacanthoma and squamous cell carcinoma, clinically and histologically. OBJECTIVE: Our purpose was to examine the patterns of TGF-alpha expression on KA and SCC using immunohistochemical staining and to evaluate the usefulness of the immunohistochemical staining with antihuman TGF-alpha antibody on differentiation between KA and SCC. METHODS: Formalin-fixed, paraffin-embedded specimens that had confirmed to KA(n=12) or SCC(n=10) were performed by immunoperoxidase staining with monoclonal antihuman TGF-alpha antibody RESULTS: All of KA dmonstrated a diffuse pattern within tumor lobules, but, at the peripheral rim of cells, showed unstained pattern. In contrast to KA, 40% of the SCC had patchy infiltration within tumor lobules, and 60% of the SCC had diffuse pattern which was similar to the pattern found in KA. All of SCC showed well-defined staining at peripheral cells. CONCLUSION: Immunohistochemical staining with antihuman TGF-alpha antibody could be used on differentiation between KA and SCC.
Subject(s)
Carcinoma, Squamous Cell , Cell Proliferation , Keratoacanthoma , Transforming Growth Factor alpha , Transforming Growth FactorsABSTRACT
BACKGROUND: Transforming growth factor-(TGF-alpha) is a acidic, heat-stable, 50 amino acid polypeptide which is related to cellular proliferation, malignant transformation, and angiogenesis. There are many similarities between keratoacanthoma(KA) and squamous cell carcinoma(SCC). So, it is often difficult to differentiate keratoacanthoma and squamous cell carcinoma, clinically and histologically. OBJECTIVE: Our purpose was to examine the patterns of TGF-alpha expression on KA and SCC using immunohistochemical staining and to evaluate the usefulness of the immunohistochemical staining with antihuman TGF-alpha antibody on differentiation between KA and SCC. METHODS: Formalin-fixed, paraffin-embedded specimens that had confirmed to KA(n=12) or SCC(n=10) were performed by immunoperoxidase staining with monoclonal antihuman TGF-alpha antibody RESULTS: All of KA dmonstrated a diffuse pattern within tumor lobules, but, at the peripheral rim of cells, showed unstained pattern. In contrast to KA, 40% of the SCC had patchy infiltration within tumor lobules, and 60% of the SCC had diffuse pattern which was similar to the pattern found in KA. All of SCC showed well-defined staining at peripheral cells. CONCLUSION: Immunohistochemical staining with antihuman TGF-alpha antibody could be used on differentiation between KA and SCC.
Subject(s)
Carcinoma, Squamous Cell , Cell Proliferation , Keratoacanthoma , Transforming Growth Factor alpha , Transforming Growth FactorsABSTRACT
Cutaneous metastasis of the papillary thyroid carcinoma(PTC) is very rare. We report a case of PTC that metastasized to the left fourth fingertip. Its cutaneous appearance was similar to granuloma pyogenicum. A 65-year-old woman who has PTC with regional lymph nodes involvement and pulmonary metastasis complained of a protruding hemorrhagic subungual mass on the left fourth finger for two months. The histopathologic findings showed papillary projections of the tumor cells surrounding the axial fibrovascular stroma and mitotic cells. The tumor cells showed a positive reaction with antithyroglobulin antibody in immunoperoxidase stain. To the best of our knowledge, this is the first case report of PTC that metastasized to the fingertip, and that showed granuloma pyogenicum-like cutaneous lesion at the metastatic site.
Subject(s)
Aged , Female , Humans , Fingers , Granuloma , Granuloma, Pyogenic , Lymph Nodes , Neoplasm Metastasis , Thyroid Gland , Thyroid NeoplasmsABSTRACT
Kaposis sarcoma(KS) is a multicentrically developing vascular neoplasm with four types of clinical manifestation. One of these, classic KS is clinically carmcterized by late onset, chronic course and radiosensitive. We report a case of classic KS in a 72-year-old male. This pateint complainted of purple patches and dark purple nxluk. on slightly edematous lower legs. The histopathologic sections from the lesional sites showed infiltration of spindle cells with newly formed vascular slits, dilated blood vessels and aggregated hemosiderins in the dermis.
Subject(s)
Aged , Humans , Male , Blood Vessels , Dermis , Hemosiderin , Leg , Sarcoma , Vascular NeoplasmsABSTRACT
A case report of a 60 year-old man with lichen aureus of leg is presented. Clinically the solitary golden to purple colored patch consists of lichenoid papules, plsque, and mild petechiae around the lesion, and the histology reveals a dense and bandlike infiltrate hugging thepidermis. It consists of lymphocytes, histiocytes, eosinophils, and many extravasated erythrocytes and hemosiderin in dermis, but a few red cells and increased melanin pigment can also be seen in the epidermis. The eruption is mildly itchy and has been present 6 months.