Melanoacanthoma is an extremely rare pigmented benign mixed epithelial tumor of both melanocytes and keratinocytes. A 52-year-old female presented an asymptomatic, slightly elevated, 1. 2 cm x 0. 8 cm, dark black-colored plaque on her right buttock of 2 years' duration. Histopathologic finding of the plaque shows hyperkeratosis, focal parakeratosis, follicular plugging, acanthosih, papillomatosis and pseudo-horn cyst in the epidermis. The tumor is composed of basaloid and squarnous cells with many foci of clusters and whorls of melanin pigment-laden cells. Electron microscopic finding reveals many scattered melanocytes in the entire epidermis. Melanin granules are found mostly in the melanocytes but can also be found in a few keratinocytes.
Buttocks ; Epidermis ; Female ; Humans ; Keratinocytes ; Melanins ; Melanocytes ; Middle Aged ; Papilloma ; Parakeratosis

Dental practice can produce and spread some infetious diseases from patients to dentist, dental assistant, and dental labors. One possible method for preventing these cross-contamination is to immerse dental impression in chemical disinfectants. So far many investigators studied on the dimensional changes of dental impressions and on the surface qualities of stone casts made from impression following immersion in disinfectants. This study was proposed to evaluate some popular impression/disinfectant combination from the point of dimensional stability. Impression was taken from dental arch-shaped metal model. Irreversible hydrocolloid and 3 elastomers(polyvinyl siloxane, polysulfide, polyether) were immersed in 3 disinfectants (2% glutaraldehyde, 1% povidone-iodine, 0.5% sodium hypochlorite) for 10 minutes and measured both cross-arch and anterior-posterior distance under stereo microscope to evaluate dimensional change. The results obtained were as follows: 1. Dimensional changes of irreversible hydrocolloid impression was statistically different in crossarch and anterior-posterior distance when immersed in 2% glutaraldehyde solution and in anterior-posterior distance when immersed in 0.5% sodium hypochlorite solution from control group(p<0.05). 2. Dimensional changes of polyvinyl siloxane and polysulfide impression were not statistically different from control group (p>0.05). 3. Dimensional changes of polyether impression was statistically different in cross-arch distance when immersed in 0.5% sodium hypochlorite solution and in anterior-posterior distance when immersed in 1% povidone-iodine solution from control group (p<0.05). 4. In all cases, dimensional changes were less than 0.1% from the original dimension and concluded clinically acceptable
Colloids ; Dental Assistants ; Dentists ; Disinfectants ; Disinfection* ; Glutaral ; Humans ; Immersion* ; Polyvinyls ; Povidone-Iodine ; Research Personnel ; Siloxanes ; Sodium ; Sodium Hypochlorite

In vivo ethane production in rats was used as an index of oxygen toxicity. The rats were allocated to four exposure conditions; hyperbaric oxygenation (HBO=5 ATA, 100% O2), normobaric oxygenation (NBO=1 ATA, 100% O2), hyperbaric aeration (HBA=5 ATA, 21% O2) and normobaric aeration (NBA=1 ATA, 21% O2). After 120 minutes of exposure, the rats exposed to high concentration and/or high pressure oxygen exhaled significantly larger amounts of ethane than those exposed to NBA, and the differences in ethane production between any two groups were statistically significant (p<0.01). This finding supports the hypothesis that hypothesis that hyperoxia increase oxygen free-radicals and the radicals produce ethane as a result of lipid peroxidation. It is notable that the ethane exhalation level of the HBA group was significantly higher than that of the NBO group. This difference could not be accounted for by the alveolar oxygen partial pressure difference between the two groups.
Animals ; Ethane* ; Exhalation* ; Hyperbaric Oxygenation ; Hyperoxia* ; Lipid Peroxidation* ; Oxygen ; Partial Pressure ; Rats

Rotatory fixation of the atlantoaxial joint is relatively rare in adults but somewhat more common in children. Most of them are reduced spontaneously or after traction. However, combined rotatory injury of atlantoaxial joint and unilateral occipitoatlantal subluxation is a rare disease, and it is often difficult to diagnose accurately. Because the craniovertebral junction is complex and patients with combined atlantoaxial rotatory fixation (AARF) and occipitoatlantal subluxation has a less rotated head than patients with pure AARF. And injury of the occipitoatlantal and atlantoaxial joint can often result upper cervical instability, so early diagnosis is very important. We present a case of the combined AARF and unilateral counter occipitoatlantal subluxation after minor trauma.
Adult ; Arthrodesis ; Atlanto-Axial Joint ; Child ; Early Diagnosis ; Head ; Humans ; Organothiophosphorus Compounds ; Rare Diseases ; Traction

OBJECTIVE: Chlamydia trachomatis is one of the most common causative microorganism in pelvic inflammatory disease (PID). In this infection tubal obstruction, infertility, tubal pregnancy and recurrent pelvic infection has involved. Also, perinatal infection, spontaneous abortion and preterm labor of pregnant women increased in chlamydia infection. This study was performed to investigate the prevalence rate and clinical characteristics of Chlamydia trachomatis in symptomatic women. METHODS: From March, 2003 to March, 2004, in OB-Gyn development, endocervical swab were obtained in 218 patients (137 impatients of PID and 81 outpatients) by Amplicor Chlamydia Transfer Kits and Human papilloma virus kit. They were studied on history taking, physical examination, laboratory test, and polymerase chain reaction for the detection of Chlamydia trachomatis. Also, in this study we investigated the prevalence of human papilloma virus and N. gonorrhea in the Chlamydia infection group. RESULTS: The prevalence rate of Chlamydia trachomatis was 27.5% (61/218) in pelvic inflammatory disease. As regarding the age distribution of Chlamydia trachomatis positive group was the high prevalence rate in twenties (52.8%). Chlamydia infection was related to the history of artificial abortion, oral contraception, occupation status, history of gynecologic disease (PID, Ectopic pregnancy). Women with chlamydial infection were 2.5 times greater risk of coincidal HPV infection and 2 times greater risk of coincidal N. gonorrhea infection and both were statistically significant. CONCLUSION: The prevalence rate of Chlamydia infection is higher than any other sexually transmitted disease and Chlamydia infection has serious complication on reproduction. It appears weak symptom and detection is difficult. Therefore the screening and treatment of Chlamydia trachomatis are necessary to decrease the prevalence and prevention of complication.
Abortion, Spontaneous ; Age Distribution ; Chlamydia Infections ; Chlamydia trachomatis* ; Chlamydia* ; Contraception ; Fallopian Tube Diseases ; Female ; Genital Diseases, Female ; Gonorrhea ; Humans ; Infertility ; Mass Screening ; Obstetric Labor, Premature ; Occupations ; Papilloma ; Pelvic Infection ; Pelvic Inflammatory Disease* ; Physical Examination ; Polymerase Chain Reaction ; Pregnancy ; Pregnancy, Tubal ; Pregnant Women ; Prevalence ; Reproduction ; Sexually Transmitted Diseases

Midtrimester genetic amniocentesis is an important diagnostic tool in prenatal genetic diagnosis and counseling. We can identify karyotypes with metaphase chromosome analysis of cultured amniocytes. Marker chromosomes are defined as unidentified structurally abnormal chromosomes. Incidence of marker chromosomes in the previous reported studies was 0.6-1.5/1,000. They occurred more frequently with advanced maternal age. Ascertainment of chromosomal origin is important because it may be associated with malformation and developmental abnormalities. Recently, identification of the origin and composition of marker chromosomes has been made possible by the use of fluorescent in situ hybridization (FISH). Most marker chromosomes are known to be originated from chromosome 15 or 22, X, Y. We have experienced a case of non-15, non-22 marker chromosome prenatally detected in amniocentesis and FISH, so we reported it with a brief review of literature.
Amniocentesis ; Chromosomes, Human, Pair 15 ; Counseling ; Diagnosis ; Female ; Humans ; In Situ Hybridization, Fluorescence ; Incidence ; Karyotype ; Maternal Age ; Metaphase ; Pregnancy ; Pregnancy Trimester, Second

No abstract available.
Drug Therapy* ; Gestational Trophoblastic Disease*

Intraaortic balloon counterpulsation (IAB) has been shown to prolong survival in the critically ill cardiac patients. Originally developed for use in the patients with cardiogenic shock, the indications have been expanded. But despite technical advances, the complication rate associated with IAB remains high. The most commonly reported complications include damage to the femoral artery and distal embolization. Other reported major complications are balloon rupture, limb loss, bleeding, systemic infection and bowel infarction. We report a patient complicated by ischemic colitis causing stenosis and intestinal obstruction after IAB insertion.
Colitis, Ischemic* ; Constriction, Pathologic* ; Counterpulsation* ; Critical Illness ; Extremities ; Femoral Artery ; Hemorrhage ; Humans ; Infarction ; Intestinal Obstruction ; Rupture ; Shock, Cardiogenic

No abstract available.
Free Tissue Flaps* ; Lower Extremity* ; Soft Tissue Injuries*

Leukemia cutis are clinically divided into the specific and nonspecific types. The former demon strates a malignant cell infiltrate on histopathologic examination. We report a case of leukemia cutis in a 29-year old female which developed specific cutanous manifestations previous to peripheral blood abnormalities, She had suffered from several discrete, bean to walnut sized, tender, erythematous patches and nodules on the trunk for 3 months and these gradually spread to the right cheek and upper arm. Atypical lymphocytes and incesassed lymphoblasts were notifced on a peripheral blood smear and bone marrow aspiration. A bone marrow biopsy revealed compact marrow finding, and increased celluarity. The histopathlogic findings showed diffuse dermal and subcutaneous infiltration of atypical lymphocytes. An immunohistochemical study with kappa, lamda, and leukocyte common antigen(LCA) revealed lymphoid malignancy, T-cell type. We treated her with various combined chemotherapy for 2 year, but her skin lesions were not inproved.
Adult ; Arm ; Biopsy ; Bone Marrow ; Cheek ; Drug Therapy ; Female ; Humans ; Juglans ; Leukemia* ; Leukocytes ; Lymphocytes ; Skin ; T-Lymphocytes