BACKGROUND: The relationship and differentiation among various dendritic cells of the dermis are unclear. Recently it has hecome possible to identify different subpopulat,ions of dermal dendritic cells using anti-CD34 and anti-factor XIIIa antibodies. OBJECTIVE: To elucidate which cell types the fibrous dermal turnors consist of we compared the staining patterns of these antibodies as well as of anti-Mac 387 antibody which are labeled as inflammatory cells of the monocyte-macrophage lineage. METHODS: Tumors studied included dermatofibrosarcoma protuberans(DFSP, n=2), dermato-fibroma(n=22), neurofibroma, n=27), acrochordon(n=15), keloid, hypertrophic scar(n=10), juvenile xanthogranuloma(n=1, and malignant fibrous histiocytoma (MFH, n=1). We performed immunoperoxidase staining(AUSC technique) with polyclonal anti FXIIIa antibody, monoclonal anti-CD34 antibody, and monoclonal anti-Mac 387 antibody on the formalin-fixed-paraffin-embedded tissue specimens of these fibrous tumors. The intensity of staining was graded as negative, weakly staining, or strongly stainiring. RESULTS: FXIIIa reactivity was strongly present in dendritic and spindle-shaped cells of all dermatofibromas and some nurofibromas(11 of 27 specimens), but absent from the other fibrous tumors. Among these tumors, one of the two DFSPs was uniquely expressed CD34. Dendritic and spindle-shaped cells within tiese tumors were MAC 387 negative. In inflammatory conditions, variable numbers of MAC 38 positive cells were observed, corresponding to histiocytes and mac-rophages, but the labeling of ipithelioid cells and multinucleated foreign body giant cells were variable. CONCLUSION: The findings of significant numbers of FXIIIa positive cells in dermal fibrous tumors studied suggest that thet may be diagnostic utility associated with the use of this antit)ody. In addition, CD 34 expression by the tumor cells can be an extremely useful marker in establishing a definitive diagnosis of IFSP.
Antibodies ; Dendritic Cells ; Dermatofibrosarcoma ; Dermis ; Diagnosis ; Factor XIIIa* ; Giant Cells, Foreign-Body ; Histiocytes ; Histiocytoma, Benign Fibrous ; Histiocytoma, Malignant Fibrous ; Keloid ; Langerhans Cells ; Neurofibroma

Bowens disease is generally regarded as a premalignant dermatosis. If untreated, 3% to 5% of patients may develop squamous cell carcinoma. However, sebaciou carcinoma arising from Bowens disease is very rare. We presented a case of quarnous cell carcinoma and sebaceous circ s disease in a 68 year-old male. He had multiple bowenoid skin lesi nsties. A bean-sized nodule as developed on the bowenoid lesion of the he had a large yellow crust.ed exudative tumor on the Rt. thigh. We took a biopsy specimen of these three discrete lesions. The nu lipid stain of frozen section revealed Bowens disease, squarnous concllnoma arising from Bowen on the trunk and extremi Rt. lower abdomen. Almost of routine histology and carcinoma, and sebaceous carcinoma, respectively.
Abdomen ; Aged ; Biopsy ; Bowen's Disease ; Carcinoma, Squamous Cell* ; Frozen Sections ; Humans ; Male ; Skin ; Skin Diseases ; Thigh

Merkel cell carcinoma is a relatively uncommon, cutaneous, neuroendocrine neoplasm that was first recognized by Toker in 1972. Occasionally it is found concurrent with squamous cell carcinoma or basal cell carcinoma and in them cases, the coexistence of them is suggesive of presenting the effect of a common carcinogenic influence on two distinct precursor cells. Now the authors report a case of Merkel cell carcinoma associated with squamous cell carcinoma arising in the overlying epidermis, and a brief review of literatures is introduced. The patient was a 75-year-old female, who had noticed a reddish brown, ulcerated mass on the right buttock. It had progressively enlarged to become lemon-size during last 4 months. The right buttock mass excised measured 10x8x3 cm and was gray white, solid, with an ill-defined marigin. Histologically the tumor was located in the dermis and was lacking in connection with the epidermis in which invasive squamous cell carcinoma developed. The neoplastic cells were arranged in a diffuse, lymphoma-like pattern or trabecular arrangement and their cytologic details were reminiscent of small cell carcinoma of the lung, On electron microscopy the cells displayed many neurosecretory granules averaging about 100nm in diameter, intermediate filaments and desmosomes. Immunohistochemically a ball-like immunostaining for keratin, resembling an inclusion body, was seen, but other markers, including neuron-specific enolase, vimentin, S-100 protein and leukocyte common antigen, were unrewarded.
Female ; Humans

Met protein is a transmembrane 190 kD heterodimer with tyrosine kinase activity, encoded by c-Met oncogene. It serves as a high affinity receptor for hepatocyte growth factor (HGF)/scatter factor (SF), a cytokine which stimulates cell proliferation, motility, and invasion. In this study, we immunohistochemically evaluated the expression of Met/hepatocyte growth factor receptor in colorectal cancers. Met protein was expressed in 31 of 72 patients (43.1%). The staining pattern was cytoplasmic in nature, present throughout the tumor, and showed variable intensity from case to case. The relationship between the expression rate and intensity, and age and sex of patients, tumor size (p=0.645), tumor site (p=0.902) and tumor differentiation (p=0.844) was not statistically significant. The expression rate and intensity were significantly correlated with lymphovascular invasion (p=0.001), lymph node metastasis (p=0.010), depth of invasion (0.019), and stage (p=0.023). Cytoplasmic accumulation of Met protein was not associated with enhanced PCNA index of tumor cells (p=0.052). These results suggest that Met protein may play an important role in the invasion and metastasis of colorectal cancer cells.
Cell Proliferation ; Colorectal Neoplasms* ; Cytoplasm ; Hepatocyte Growth Factor ; Humans ; Lymph Nodes ; Neoplasm Metastasis ; Oncogenes ; Proliferating Cell Nuclear Antigen ; Protein-Tyrosine Kinases

The clinical and pathological features of solitary fibrofolliculoma are presented. Solitary fibrofolliculoma is very rarely encountered and to our knowledge, only 7 cases have been reported in the Western literature and no cases have been published in Korea. We experienced a case of solitary fibrofolliculoma occurring in a 56-year-old female, who had a 1.0 cm-sized and slowly growing nodule on her chin. A brief review of the literature, was made especially in relation to the pathological findings and histogenesis of solitary fibrofolliculoma.
Female ; Humans

Infection with Helicobacter pylori (H. pylori) leads to gastritis, but the majority of infected persons are asymptomatic, and it has been recently described that the ability of H. pylori to cause more severe disease is related to the presence of the cytotoxin-associated gene A (cagA). We investigated the prevalence of cagA-bearing strains in a group of H. pylori-positive gastritis, and compared the morphologic differences between cagA-positive and cagA-negative cases on H&E stained slides. Polymerase chain reaction (PCR) assays for detection of H. pylori and cagA of 62 gastric biopsy specimens were performed. All the slides were analyzed by the updated Sydney system. Forty eight (77.4%) were PCR positive for H. pylori and thirty four (54.8%) were positive for cagA. There were no significant differences in numbers of H. pylori, degree of infiltration of mononuclear cells and degree of atrophy between cagA-positive and cagA-negative groups. The rates of neutrophilic infiltration and intestinal metaplasia were significantly higher in cagA-positive group than in cagA-negative group. In conclusion, the detection of H. pylori by PCR method is more sensitive than that of microscopic examination and H. pylori strains possessing cagA are associated with an enhanced induction of severe gastritis.
Atrophy ; Biopsy ; Gastritis* ; Helicobacter pylori ; Helicobacter* ; Humans ; Metaplasia ; Neutrophils ; Polymerase Chain Reaction ; Prevalence

Metastases to the sinonasal tract are infrequent occurrences from primaries below the clavicles. The total number of reported cases to date is less than 100. There is, however, complete unanimity concerning the histologic type of metastatic neoplasm most often encountered. An interesting phenomenon, generally attributable only to breast and renal cell carcinoma, is the late recurrence of the malignant tumor, even 10 or more years after operation. A 61 year-old-male was admitted to ENT due to frequent epistaxis and right facial swelling. CT scan revealed a huge soft tissue density mass I right maxillary sinus with extension into nasopharynx and deviation of nasal septum. The histologic diagnosis was metastatic renal cell carcinoma. He had left nephrectomy because of renal cell carcinoma, 14 years ago. We report a case of metastatic renal cell carcinoma of maxillary sinus in view of rarity, and a brief review of the literature related to this type of tumor is presented.
Male ; Humans ; Neoplasm Metastasis

PURPOSE: We evaluated the frequency of detection of small hepatic cystic lesion(SHC) on abdominal CT films and its significance in patients with extrahepatic malignancies. METHODS AND MATERIALS: We retrospectively reviewed the abdominal CT films of a total 1112 patients to determine the frequency of detection of SHC, and 62 patients who had both extrahepatic malignancies and SHC were selected. A total 106 SHC determined as benign or malignant in 40 patients was analyzed according to the size(< 1 cm, 1 2cm), the number(1, 2 4, >4), the margin(well-defined, iil-defined),and the location(central, peripheral) of individual cystic lesions. The findings of follow-up CT and ultrasonography and the results of biopsy were also reviewed. The frequency of combined renal cyst was also considered. RESULT: SHC of those 62 patients were classified as benign(27 patients, 43.6%), malignant(13 patients, 20. 9%), or undetermined(22 patients, 35.5%) by the follow-up CT, ultrasonography, and biopsy. Most benign SHC (74.4%) measured under 1 cm, but 75% of the malignant SHC were in 1 -2cm in size. The percentage of the malignancy in one and two to four SHC was 37.5% and 40%, respectively. The margin of SHC was ill-defined in 67.9% of the benign and 64.3% of the malignant lesions. SHCs were mainly located at the periphery of the liver(benign :62.7%, malignant: 64.3%). Coexisting renal cyst was rare. CONCLUSION: SHC is not uncommon finding(13.2%) in patients with extrahepatic malignancy and has a high probablity of metastasis when it is larger than 1 cm, which should be closely followed and intensively studied further.
Biopsy ; Follow-Up Studies ; Humans ; Incidence* ; Neoplasm Metastasis ; Retrospective Studies ; Tomography, X-Ray Computed ; Ultrasonography

No abstract available.

We reviewed 50 skin biopsies obtained from 40 patients with cutaneous leiomyoma during a 10 year period from January 1980 to December 1989. The result.s were summarized as follows: 1) Sex distribution showed a female preponderance with male.female ratio of 1: 1.9. 2) The age distribution was relatively even from childhood to old age. The mean age was 47,8 years, 3) The most common site of lesion was lower leg(34%) followed by hand(24%), foot(12% ), anterior chest(8% ), face(6% ), neck(4%), upper arm(4% ), labia major(2 %) and nipple(2%). 4) The lesions were relatively well circumscribed subcutaneous nodule, papule, plaque and nodule which measured between 0.3cm to 5cm in size and their colors were erythematous to light brown. 5) The most common clinical and histopathologic type was angioleiomyoma(75%) followed by solitary piloleiomyoma(12.5%), multiple piloleiomyoma(7,5%) and solitary genital leiomyoma(5% ). Angioleiomyomas were clincally associated with cavernous hemangioma, myoma of uterus and systemic lupus erythematosus. 7) The clinical diagnoses were mass(30% ), epidermal cyst(20%), dermatofibroma (12.5% ), leiomyoma(12,5%), neurilemmoma(5%), lipoma(5%), calcifying epithelioma(2.5%), metastatic carcinoma(2.5%), morphea(2.5% ), fibrocystic disease(2.5%), glomus tumor(2.5 % ) and Dupuytrens contracuture(2..5%).
Age Distribution ; Angiomyoma ; Biopsy ; Diagnosis ; Female ; Hemangioma, Cavernous ; Histiocytoma, Benign Fibrous ; Humans ; Leiomyoma ; Lupus Erythematosus, Systemic ; Myoma ; Sex Distribution ; Skin ; Uterus