1/6. Prominent hyperkeratotic plantar and palmar warts.We report the case of a 28-year-old man who had prominent hyperkeratotic plantar and palmar warts, and flat warts on his face and chest. By dna hybridization, human papillomavirus 1 and/or 2, and 3 dna were detected from the tissues of these skin lesions. Results of laboratory investigations revealed leukopenia, eosinophilia, anti-HBs antigen and anti-hepatitis c virus antibody, and decrease in the OKT4/OKT8 ratio. He had no abnormality in cellular immunity. He was treated with multiple modalities, but was successfully treated with electrocautery to the plantar and palmar warts, and cryotherapy with liquid nitrogen to the flat warts. Nine years after the initial treatment, almost no recurrence was recognized.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
2/6. epidermodysplasia verruciformis treated using topical 5-aminolaevulinic acid photodynamic therapy.We describe a 65-year-old woman who had had wart-like lesions on the hands, lower arms and forehead for about 45 years. She had already had several basal cell carcinomas excised. Histological study, electron microscopy and in situ hybridization [human papilloma virus (HPV)-types 5/8/12/14/19-23/25/36] of skin biopsies confirmed a diagnosis of epidermodysplasia verruciformis (EV). Photodynamic therapy (PDT) was performed using a 20% 5-aminolaevulinic acid ointment applied for 6 h to the lesions and irradiating using an incoherent light source (lambda = 580-740 nm, 160 mW/cm2, 160 J/cm2). Following PDT, blistering and crusting of the lesions occurred, but these healed completely within 2-3 weeks without scarring, and the cosmetic result was excellent. Six months after PDT a skin biopsy was taken. in situ hybridization was positive for HPV type 8 in skin which was clinically and histologically normal. Twelve months after PDT a few lesions had recurred on the hands. Although permanent cure of EV cannot be achieved by any therapy at present and single lesions continue to appear in this patient, topical PDT might result in better control of HPV-induced lesions.- - - - - - - - - - ranking = 2keywords = hybridization (Clic here for more details about this article) |
3/6. Multiple palmar epidermoid cysts.Implantation of epidermal fragments into the dermis has been pointed out as the cause of common epidermal cysts. However, some palmoplantar epidermoid cysts have been reported to be caused by human papillomavirus (HPV) infection or to be derived from eccrine ducts. A 65-year-old left-handed woman presented with extraordinary multiple epidermoid cysts on the palm and volar aspect of the fingers of her left hand. HPV infection was not detected by immunohistochemistry, in situ hybridization and polymerase chain reaction. Histological investigation revealed syringeal structures within the cyst wall and in the cyst cavity. carcinoembryonic antigen was observed in these syringeal structures but was not specifically stained in the cyst wall cells by immunohistochemistry. The cytokeratin composition of the cyst wall cells was similar to that of the nonadnexal epidermis.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
4/6. Detection of human papillomavirus type 58 in polydactylous bowen's disease on the fingers and toes of a woman - concurrent occurrence of invasive vulval and cervical carcinomas.The group related to human papillomavirus (HPV) type 16 (HPV-16, -31, -33, -35, -52, -58 and -67) is dominantly identified in cervical intraepithelial neoplasia and cervical carcinomas. HPV-16 has also been frequently detected in bowen's disease on the hands and feet. We describe herein a case of polydactylous bowen's disease on the fingers and toes of a woman who had had radical vulvectomy and hysterectomy for concomitant invasive vulval and cervical carcinomas. All the lesions, except for the lesions on the periungual side of her left index, middle and ring fingers, harbored HPV-58 dna with more than 100 entire viral genome copies per cell detected by Southern blot hybridization. The histological localization of the viral dna was confirmed in all the lesions by in situ hybridization. We could also retrospectively demonstrate HPV-58 dna in her invasive vulval and cervical carcinoma tissues.- - - - - - - - - - ranking = 2keywords = hybridization (Clic here for more details about this article) |
5/6. infection with mycobacterium avium-intracellulare with abscess, ulceration and fistula formation.Infections caused by mycobacterium avium-intracellulare complex are generally manifested as pulmonary disease, osteomyelitis or lymphadenitis, and cutaneous infection is rare. We describe a case of M. intracellulare infection of the skin in a 79-year-old man without apparent immunologically disabling disease or therapy. He had cutaneous infection of the right hand over 10 years, developing a fistula and, finally, an ulcer and abscess, 2 months before his death from heart failure. Mycobacterium intracellulare was identified by both microbiological characteristics and dna-dna hybridization.- - - - - - - - - - ranking = 1keywords = hybridization (Clic here for more details about this article) |
6/6. polymerase chain reaction-reverse cross-blot hybridization assay in the diagnosis of sporotrichoid mycobacterium marinum infection.In this paper, we report a patient in whom mycobacterium marinum sporotrichoid infection was diagnosed using polymerase chain reaction (PCR) amplification of the 16S rRNA gene and subsequent analysis of the amplified product in a reverse cross-blot hybridization assay with mycobacterial species-specific probes. This molecular method allowed us rapidly to detect and identify this organism directly in the patient's lesional skin biopsy rather than in cultures in conventional media. The identification provided by PCR-reverse cross-blot hybridization assay was confirmed by examination of the morphological and biochemical features and by high-performance liquid chromatography analysis of mycolic acid from the clinical isolate, suggesting the validity of our molecular approach.- - - - - - - - - - ranking = 6keywords = hybridization (Clic here for more details about this article) |