Antimicrobial susceptibility surveillance of bacterial isolates recovered in Japan from odontogenic infections in 2013.

We report on the findings of the first antimicrobial susceptibility surveillance study in Japan of isolates recovered from odontogenic infections. Of the 38 facilities where patients representing the 4 groups of odontogenic infections were seen, 102 samples were collected from cases of periodontitis (group 1), 6 samples from pericoronitis (group 2), 84 samples from jaw inflammation (group 3) and 54 samples from phlegmon of the jaw bone area (group 4) for a total of 246 samples. The positivity rates of bacterial growth on culture were 85.3%, 100%, 84% and 88.9%, respectively, for groups 1, 2, 3 and 4. Streptococcus spp. isolation rates according to odontogenic infection group were 22% (group 1), 17.7% (group 3) and 20.7% (group 4). Anaerobic isolation rates were 66.9% (group 1), 71.8% (group 3) and 68.2% (group 4). Drug susceptibility tests were performed on 726 strains excluding 121 strains that were undergrown. The breakdown of the strains subjected to testing was 186 Streptococcus spp., 179 anaerobic gram-positive cocci, 246 Prevotella spp., 27 Porphyromonas spp., and 88 Fusobacterium spp. The isolates were tested against 30 antimicrobial agents. Sensitivities to penicillins and cephems were good except for Prevotella spp. The low sensitivities of Prevotella spp is due to ß-lactamase production. Prevotella strains resistant to macrolides, quinolones, and clindamycin were found. No strains resistant to carbapenems or penems were found among all strains tested. No anaerobic bacterial strain was resistant to metronidazole. Antimicrobial susceptibility testing performed on the S. anginosus group and anaerobic bacteria, which are the major pathogens associated with odontogenic infections, showed low MIC90 values to the penicillins which are the first-line antimicrobial agents for odontogenic infections; however, for Prevotella spp., penicillins combined with ß-lactamase inhibitor showed low MIC90 values.

Intravascular lymphomatosis mimicking primary central nervous system lymphoma: a case report and literature review.

We herein report a 75-year-old female patient with intravascular lymphomatosis (IVL) who presented with fever of unknown origin. Examination, including contrast-enhanced CT and (67)Ga scintigraphy, failed to show any lesions. Her blood levels of lactate dehydrogenase and soluble interleukin-2 receptors were high, suggesting a lymphomatous tumor. A bone marrow puncture was negative, and a random skin biopsy revealed a monoclonal proliferation of naked, large lymphocytes in the vascular space of the subcutaneous tissue, confirming the diagnosis of IVL. MRI, performed 7 weeks after admission, showed a brain mass mimicking primary central nervous system lymphoma. The mass was considered to be a collection of malignant lymphocyte cells invading from the vessels. Without the random skin biopsy, this case may have been misdiagnosed as primary central nervous system lymphoma.

Does swallowing function recover in the long term in patients with surgically treated tongue carcinomas?

PURPOSE: The present study aimed to measure postsurgical swallowing function in patients 5 years after the surgical treatment of tongue carcinoma. PATIENTS AND METHODS: Using a retrospective cohort study design, the investigators enrolled postsurgical patients treated for tongue carcinomas in Hokkaido University Hospital. The primary outcome variable was oropharyngeal swallow efficiency (OPSE) determined by videofluoroscopic evaluation, and OPSE at follow-up was compared with that at discharge. Other variables included current nutritional status (body mass index, serum albumin), dietary intake, self-rating of current swallowing function, and occurrence of pneumonia. Statistical analysis used the paired t test and the Spearman rank correlation. RESULTS: Swallowing function was assessed in 20 patients (11 men and 9 women) who underwent the surgical treatment of tongue carcinomas; the median age was 70 years (range, 56 to 90 yrs). The mean OPSE values for liquid and paste at follow-up were 26.6 ± 21.2 and 21.9 ± 22.5, respectively. The mean values for the body mass index and serum albumin at presentation were 22.2 ± 3.4 kg/m(2) and 4.5 ± 0.3 g/dL, respectively. All patients had a full oral intake of foods, with a mean self-rated value of 6.4 ± 2.5, a value acceptable to the patients. Pneumonia requiring hospitalization did not occur in these patients. CONCLUSIONS: The long-term follow-up of patients after the surgical treatment of tongue carcinomas showed acceptable levels of oral function and nutritional status despite objective measurements of poor swallowing efficiency assessed using videofluoroscopy.

Occult lacerations to the epiglottis and pharynx by glass fragments.

Injury to the epiglottis and pharynx is very rare in neck trauma overall. We experienced such a rare case in which a 43-year-old woman had lacerations to the epiglottis and pharynx. It was difficult to determine the exact site of the damage by observing the cut. We believed there was no damage to the lower respiratory tract because her vital signs were stable and her consciousness was clear. However, initial computed tomography revealed emphysema and showed that fragments from a glass vase had pierced the posterior pharyngeal wall.

Ultrastructural changes induced in cutaneous collagen by ultraviolet-A1 and psoralen plus ultraviolet A therapy in systemic sclerosis.

In the present study, we examined the ultrastructural alterations in collagen fibrils clinically softened by ultraviolet-A1 (UVA1, 340-400 nm) therapy and psoralen plus long-wave ultraviolet (PUVA) therapy and compared collagen fibril diameters in four patients with systemic sclerosis (SSc). In skin sclerosis, the dermis is compacted from the epidermal layer to the sweat glands, and the collagen bundles are thicker with decreased space between them. We obtained skin specimens before and after UVA1 or PUVA therapy, and compared cutaneous alterations in one diffuse-type patient and one limited-type patient following UVA1 therapy, and in two diffuse-type patients following PUVA treatment. Ultramicroscopic analysis revealed that UVA1 treatment decreased the diameter of the broad collagen fibrils, mainly in the upper reticular layer. PUVA induced similar alterations in the collagen fibrils, extending to the upper and middle reticular layers. PUVA therapy induced alterations in collagen fibril diameter in deeper layers than did UVA1 therapy, which might be related to the direct action of UV light and the depth of the light penetration. In three of four patients, collagen fibril diameter decreased, collagen fibril thickness equalized, and new, thin fibrils developed among the collagen fibrils, suggesting that collagen degradation and synthesis underlie the alterations induced by UVA1 and PUVA phototherapies.

Successful treatment with topical tacrolimus in four cases of discoid lupus erythematosus.

Discoid lupus erythematosus (DLE), a cutaneous form of lupus erythematosus, is characterized as atrophic and scaly erythema and the lesions are often refractory to a wide range of topical or systemic therapies. Herein, we present four cases of DLE that were successfully treated with topical tacrolimus. Tacrolimus ointment (0.1%) was applied to DLE lesions twice daily and the erythematous plaques readily diminished after 4-8 weeks. Adverse effects, such as burning sensation or irritations, were not observed. These results indicate that topical tacrolimus might be an effective and alternative treatment to control DLE.

Clinical value of genetically diagnosed lymph node micrometastasis for patients with oral squamous cell carcinoma.

BACKGROUND: The purpose of this study was to investigate the incidence and clinical significance of genetically diagnosed lymph node micrometastasis for patients with oral squamous cell carcinoma (SCC). METHODS: A total of 495 lymph nodes obtained from 21 patients with primary oral SCCs that had p53 mutations were examined for corresponding p53 mutations in lymph nodes using mutant allele-specific amplification (MASA). RESULTS: Among 476 histologically negative nodes, 44 were scored as positive for metastasis by MASA. All 19 histologically positive lymph nodes were genetically positive. Four of the 10 pN0 cases and nine of the 11 pN-positive cases had genetically positive micrometastases. Four patients who had five or more genetically positive lymph nodes located in three or more levels, three with disease staged as pN0 or pN1, died of cancer. CONCLUSIONS: These results indicate that a high rate of micrometastasis in cervical lymph nodes of oral SCCs and patients with multiple or lower neck spread of micrometastases have a poor prognosis; they should be treated with postoperative adjuvant therapy.

Management of mandibular osteoradionecrosis corresponding to the severity of osteoradionecrosis and the method of radiotherapy.

PURPOSE: : To demonstrate appropriate treatment methods for mandibular osteoradionecrosis (ORN) by evaluating previous results. METHODS: : The relationship between the time interval after radiation therapy (RT) and the severity of ORN was examined. Eighty-seven patients were classified according to the extent of the lesion (grades), and the cure rates were calculated according to the RT modality, the grade, and the treatment method for ORN. RESULTS: : The later ORN developed and the higher the dose of irradiation, particularly among the patients who received external RT, the more it progressed. The initial cure rates for conservative management, marginal, and segmental mandibulectomy were 39.7%, 50%, and 86.7%, respectively. CONCLUSIONS: : Conservative management should be limited to early-onset ORN after brachytherapy with or without a low dose of external irradiation. Marginal mandibulectomy is appropriate for the late-onset ORN after brachytherapy with or without low-dose external irradiation. Segmental mandibulectomy is required for late-onset ORN after a high dose of external irradiation.