PURPOSE: To determine the extent to which magnetic resonance(MR) imaging findings can help differentiate between tuberculous arthritis (TA) and rheumatoid arthritis(RA). MATERIALS AND METHODS: This study involved sixteen patients with pathologically proven arthritis of the knee. In eight patients(mean age, 29.6 years; M:F=4:4) this was of the tuberculous variety, while eight (mean age, 47.5 years; M:F=2:6) suffered from the rheumatoid variety, which was monoarticular. For 14 patients, contrast enhancement studies were available. We retrospectively analyzed MR findings according to the demonstrated pattern of synovial thickening (regular and even, or irregular and nodular), bone erosion or abscess,bone marrow(BM) edema, the sites at which bursae were present, para-articular mass formation, and lymphadenopathy. RESULTS: In five of eight TA cases (62.5 %), irregular and nodular enhanced synovial thickening was present, while in six of eight RA cases (75%), thickening was regular and even. Bone erosions or subarticular abscesses were found in six TA cases (75%) and small erosions in three cases (37.5%) of RA. BM edema surrounding the erosion was found in four cases of TA (50%) and two of RA (25 %). In TA, edema was more extensive. In both TA and RA, all suprapatella bursae were distended while popliteal bursae were present in two cases of TA(25 %) and four of RA (50%). Para-articular masses with rim like enhancement were found in six cases of TA (75%) and in one case of RA (12.5 %). In particular, para-articular lymphadenopathy was seen in six cases of TA(75%), but not in RA. CONCLUSION: MR findings of irregular and nodular synovial thickening, extensive bone erosion, extensive BM edema, particular, para-articular abscess formation and ymphadenopathy, may help differentiate tuberculous arthritis of the knee from the rhumatoid variety.
Abscess ; Arthritis* ; Arthritis, Rheumatoid* ; Diagnosis, Differential* ; Edema ; Humans ; Knee* ; Lymphatic Diseases ; Magnetic Resonance Imaging* ; Retrospective Studies

Dermatofibrosarcoma protuberans is a rare, slowly growing, locally invasive spindle-cell tumor characterized by a protuberant cutaneous mass with a pronounced tendency to recur and by a prominent storiform histopathologic pattern'-'. We present a case of dermatofibrosarcoma protuberans with myxoid area on the chest of a 57-year-old man. The histopathological study showed a dermal tumor of uniform spindle-shaped cells with storiform pattern. Immunohistochemically, the tumor was stained positively to anti-CD34 antibody and negatively to anti-factor XIIIa antibody.
Dermatofibrosarcoma* ; Factor XIIIa ; Humans ; Middle Aged ; Thorax

We experienced conversion of supraventricular arrhythmia to normal sinus rhythm in three patients during general anesthesia using propofol and remifentanil. This may be related to direct inhibition of the cardiac conduction system or activation of the parasympathetic system. The literature review suggests that propofol and remifentanil have antiarrhythmic potential, reverting supraventricular arrhythmia during anesthesia.
Anesthesia ; Anesthesia, General ; Arrhythmias, Cardiac* ; Humans ; Propofol*

Plexiform neurilemmoma is a relatively rare, benign peripheral nerve sheath tumor, whieh usually arises in either the dermis or subcutaneous tissue. These tumors may occur singly or as multiple lesions (plexiform neurilemmomatosis), We report an unusual case of plexiform neurilemmomatosis associated with cafe au lait spots reminiscent of neurofibromatosis clinically and another case of plexiform neurilemmoma on the finger. A Biopsy revealed the characteristic palisaded arrangement of spindle cells within well circumscribed elongated nodules, The skin lesions were completely excised without recurrence thereafter.
Biopsy ; Cafe-au-Lait Spots ; Dermis ; Fingers ; Neurilemmoma* ; Neurofibromatoses ; Peripheral Nerves ; Recurrence ; Skin ; Subcutaneous Tissue

BACKGROUND: Lupus erythematosus profundus (LEP) is an unusual clinical variant of lupus erythematosus (LE). It is unclear which part LEP occupied in the disease spectrum of LE. OBJECTIVE: Clinical and histopathological studies were performed on 19 patients with LEP in order to further define the clinical patterns, know the various serological findings, and review the histopathological features. METHODS: A retrospective review was carried out of the clinical records and histopathological specimens of 19 patients with LEP. RESULTS: The most common clinical features were indurated nodules or plaques on the cheek. There was a 37% positivity in the ANA test. Histopathogically epidermal changes as well as subcutaneous involvements were common. There were no cases of newly developed SLE during the follow up period of 41 months. CONCLUSION: Most patients with LEP have a relatively benign disease course, although a few develop systemic abnormalities and have abnormal laboratory findings.
Cheek ; Follow-Up Studies ; Humans ; Panniculitis, Lupus Erythematosus ; Retrospective Studies

BACKGROUND: Pseudo-Kaposi sarcoma mimicks Kaposi sarcoma, both clinically and histopathologically. These conditions are due to congenital (Stewart-Bluefarb syndrome) or acquired (Mali) vascular malformations. OBJECTIVES: The purposes of this study were aimed at evaluating the clinical and histopathological characteristics of pseudo-Kaposi sarcoma and finding differential diagnostic tools from Kaposi sarcoma. METHODS: Clinical information of 7 patients with pseudo-Kaposi sarcoma diagnosed in Asan Medical Center from 1989 to 1999 was obtained from the medical records and clinical follow-ups. We re-evaluated 10 biopsy specimens obtained from them and immunohistochemical studies for cutaneous lymphocyte antigen (CLA), CD34, vimentin, and factor VIII were performed with the standard streptavidin-biotin method using paraffin-embedded tissue specimens of 7 pseudo-Kaposi sarcomas and 3 Kaposi sarcomas. In addition, we examined whether human herpesvirus 8 (HHV8) was detected in 3 patients by polymerase chain reaction (PCR). RESULTS: Six male and one female patients were included. Mean age was 36.3 years. Three patients were classified into Mali type and the other four patients were into Stewart-Bludfarb type. Histopathological examinations revealed capillary proliferation in the upper dermis, perivascular infiltrate of inflammatory cells, extravasated red blood cells, and fibrosis of dermis. Anti-factor VIII and CD34 stained endothelial cells only. CLA was expressed in lymphocytic infiltrate in the epidermis and dermis of pseudo-Kaposi sarcoma, whereas it was negative in Kaposi sarcoma. PCR for HHV 8 showed negative results. CONCLUSIONS: Pseudo-Kaposi sarcoma is an uncommon entity with characteristic clinical and histopathological features. Differential diagnosis between Pseudo-Kaopsi sarcoma and Kaposi sarcoma is important. We suggest that detection of HHV 8 by PCR and imunohistochemical study for CLA may be effective tools in the differential diagnosis between them.
Biopsy ; Capillaries ; Chungcheongnam-do ; Dermis ; Diagnosis* ; Diagnosis, Differential ; Endothelial Cells ; Epidermis ; Erythrocytes ; Factor VIII ; Female ; Fibrosis ; Follow-Up Studies ; Herpesvirus 8, Human ; Humans ; Lymphocytes ; Male ; Mali ; Medical Records ; Polymerase Chain Reaction ; Sarcoma ; Sarcoma, Kaposi* ; Vascular Malformations ; Vimentin

BACKGROUND: Intercellular adhesion molecule(ICAM)-1 mediates cell to cell adhesion by acting as a receptor for leukocyte surface antigen. Increased ICAM-1 expression was observed in chronic inflammatory skin diseases, such as psoriasis, atopic dermatitis and allergic contact dermatitis. Adenosine is an endogenous antiinflammatory agent released by cells under metabolically unfavorable conditions, recently the studies about antiinflammatory effects of adenosine in various tissues were increased, but there are few studies about the effect of adenosine on epidermal keratinocytes. OBJECTIVE: We investigated the effects of adenosine on ICAM-1 expression in cultured human keratinocyte cell line HaCaT cells. METHODS: Our study analyses the ICAM-1 expression in HaCaT cells by various stimulants and the effects of adenosine, adenosine receptor agonist&antagonist and an inhibitor of cellular adenosine uptake on ICAM-1 expression of cells stimulated by IFN-gamma through the cell-ELISA (enzyme-linked immunosorbent assay)&FACS (fluorescence-activated cell sorter) analysis. RESULTS: The results are summerized as follows: 1. ICAM-1 expression was significantly increased by IFN-gamma(500U/ml), IFN-gamma&TNF-alpha(10-8M) and IFN-gamma&LPS(10-8M)(p<0.05), but not by TNF-alpha, LPS and TNF-alpha & LPS. 2. Incubation of HaCaT cells with IFN-gamma(1-2000U/ml) for 48 hours induced dose-dependent expression of ICAM-1 at above 500U/ml of IFN-gamma. 3. Adenosine had no effect on ICAM-1 expression of unstimulated cells. 4. Adenosine(esp. 10-4M) significantly inhibited ICAM-1 expression of cells stimulated by IFN-gamma(p<0.01). 5. Adenosine(10-4M) significantly inhibited ICAM-1 expression of cells stimulated by IFN-gamma(p<0.01), IFN-gamma & TNF-alpha(p<0.05) and IFN-gamma&LPS. 6. The inhibition of ICAM-1 expression was not observed when cells were preincubated with an adenosine A1 receptor agonist(R-PIA) or an adenosine A2 receptor agonist (NECA). 7. The inhibition of ICAM-1 expression of adenosine was not affected by pretreatment state with an adenosine A1 & A2 receptor antagonist(theophylline)(p<0.01). 8. The inhibition of ICAM-1 expression of adenosine was not observed by pretreatment state with an inhibitor of adenosine cellular uptake (dipyridamole). CONCLUSION: High concentration of adenosine inhibits enhanced ICAM-1 expression on HaCaT cells by stimulated with IFN-gamma and these inhibitory effects of adenosine are mediated through other adenosine receptors excect adenosine A1 and A2 receptors. And we suggest that there may be an unknown intracellular mechanism about inhibition of ICAM-1 expression via intracellular-uptaken adenosine.
Adenosine* ; Antigens, Surface ; Cell Adhesion ; Cell Line* ; Dermatitis, Allergic Contact ; Dermatitis, Atopic ; Humans* ; Intercellular Adhesion Molecule-1* ; Keratinocytes* ; Leukocytes ; Psoriasis ; Receptor, Adenosine A1 ; Receptors, Adenosine A2 ; Receptors, Purinergic P1 ; Skin Diseases ; Tumor Necrosis Factor-alpha

Differential diagnoses showing Verocay body-like formation include schwannoma, palisading myofibroblastoma, palisading cutaneous fibrous histiocytoma, dermatofibroma with myofibroblastic differentiation, leiomyoma, palisaded encapsulated neuroma, and neuroma. A 60-year-old Korean man presented with a 10-year-history of an asymptomatic nodule on the right forearm. Histopathological examination revealed well-circumscribed multi-micronodules with prominent Verocay body-like formation consisted of spindle cells and extensive infiltrate of mutinous materials. The spindle cells were negative for S-100 protein and desmin, but positive for vimentin and a-smooth muscle actin by immunohistochemical staining. The micronodules were lined by CD34 and factor VIII positive endothelial cells. The mutinous materials were stained with alcian blue at pH 2.5, but not at pH 0.5. We diagnose it as myxoid myofibromatosis-type perivascular myoma showing Verocay body-like formation.
Actins ; Alcian Blue ; Desmin ; Diagnosis, Differential ; Endothelial Cells ; Factor VIII ; Forearm ; Histiocytoma, Benign Fibrous ; Humans ; Hydrogen-Ion Concentration ; Leiomyoma ; Middle Aged ; Myofibroblasts ; Myoma* ; Neoplasms, Muscle Tissue ; Neurilemmoma ; Neuroma ; S100 Proteins ; Vimentin

BACKGROUNDS/AIMS: Although laparoscopic cholecystectomy is a common and widely accepted technique, the use of prophylactic antibiotics in elective laparoscopic cholecystectomy still remains controversial. The aim of this study is to determine whether prophylactic antibiotics could prevent surgical site infection after elective laparoscopic cholecystectomy and to identify any risk factors for surgical site infection. METHODS: This study included 471 patients undergoing laparoscopic cholecystectomy between January 2009 and May 2012. Period 1 patients (279) received second generation cephalosporin 1 g intravenously after induction of anesthesia, and Period 2 patients (192) were not given prophylactic antibiotics. The characteristics and surgical site infections of the patients were compared and analyzed. RESULTS: The overall rate of surgical site infection was 1.69% for the total of 471 patients. The incidence of surgical site infection was similar for the two Periods: 5 of 279 patients (1.79%) in Period 1, 3 of 192 patients (1.56%) in Period 2 (p=0.973). All of the patients with surgical site infections were well treated under conservative treatments without any sequelae. The preoperative albumin level (p=0.023) contributed to surgical site infection. CONCLUSIONS: Prophylactic antibiotics are not necessary for elective laparoscopic cholecystectomy but patients in poor nutritional state with low albumin level should consider prophylactic antibiotics.
Anesthesia ; Anti-Bacterial Agents* ; Antibiotic Prophylaxis ; Cholecystectomy, Laparoscopic* ; Humans ; Incidence ; Nutrition Assessment ; Risk Factors ; Surgical Wound Infection

It is well recognized that radiation can be carcinogenic for a wide variety of tumors, especially, in breast, thyroid, and bone marrow which appear to be radiosensitive. The criteria for establishing the dignosis of radiation- induced malignancy are the knowledge of prior irradiation and the appearance of a malignancy in the irradiated area. We report a case of carcinoma of the thyroid and esophagus following prior neck irradiation for thyroid mass.
Carcinoma, Squamous Cell/*etiology ; Esophageal Neoplasms/*etiology ; Female ; Humans ; Middle Aged ; Neck/*radiation effects ; *Neoplasms, Radiation-Induced ; Thyroid Neoplasms/*etiology