Biomedical subjects

M Nathan

Publications and source records attributed to M Nathan.

58 records · Page 4Linked to original sources

PubMedDate not supplied

Aneurysmal bone cyst of the larynx.

Aneurysmal bone cyst is a rare lesion of the head and neck, and the mandible and maxilla are the most common sites of occurrence. To the authors' knowledge, two cases of aneurysmal bone cyst of the larynx described here are the first to be reported. Although the exact pathogenesis of this lesion is unknown, several theories of its origin are discussed. Complete surgical excision is the treatment of choice. Radiation therapy for this benign lesion is not indicated because of a possible association with the development of sarcoma. Histologic misdiagnosis of carcinoma or sarcoma of the larynx leading to unnecessary radical surgery is a risk and should be avoided by obtaining expert pathologic consultation.

Adult↗

PubMedDate not supplied

Antibodies to Chlamydia species in patients attending a genitourinary clinic and the impact of antibodies to C. pneumoniae and C. psittaci on the sensitivity and the specificity of C. trachomatis serology tests.

In a retrospective study, the prevalence of antibodies to Chlamydia trachomatis serovars D to K, C. pneumoniae, and C. psittaci in cases attending a genitourinary clinic was examined. Blood samples were collected from 7,002 cases attending the clinic in Doncaster, England between May 1983 and May 1990. Sera from these samples were tested by a modified microimmunofluorescence test using panels of microdots of egg-grown, purified elementary bodies representing a pool of C. trachomatis D to K, a single C. pneumoniae agent, a single C. psittaci agent, and a negative control. Serum specimens were tested for the presence of IgG and IgM at starting dilutions of 1/16 and 1/8, respectively. Chlamydial IgG at a level of 1/16 or higher and IgM at a level of 1/8 or higher was present in 66.6% and 2.6% of samples, respectively. Species-specific or cross-reactive IgG against C. trachomatis D to K, C. pneumoniae, and C. psittaci was present in 32.6%, 25.1%, and 0.1% of the samples, respectively. In 8.7% of samples, the level of IgG was similar against two or all three species (group-specific). IgM against C. trachomatis D to K, C. pneumoniae, or C. psittaci was present in 2.5%, 0.03%, and 0.04% of the samples, respectively. The results of the study show that antibodies to C. pneumoniae and C. psittaci account for up to half of all chlamydia IgG positive cases attending genitourinary clinics.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗

PubMedDate not supplied

Outpatient treatment of intrameatal warts in a genitourinary medicine department.

With the use of a meatourethroscope, 18 patients with intrameatal and distal urethral warts were treated by Nd-Yag laser. Further treatment was carried out with cryotherapy using 140 CryoUnit as required. Sixteen patients were cured of their warts and remained wart-free over a 3-8 month period. Meatourethroscopy proved to be a simple, safe and effective way of treatment of intrameatal and distal urethral warts. It is also an outpatient-based and painless procedure that will complement the treatment of external anogenital warts to achieve complete cure.

Adolescent↗

PubMedDate not supplied

Drug use among the urban poor in Kolkata: behaviour and environment correlates of low HIV infection.

BACKGROUND: HIV infection in injecting drug users (IDUs) has worked as a driving force for further spread of the virus in other population groups. Major metropolitan cities such as Mumbai, Kolkota, Chennai and Delhi have seen a diffusion of injecting drug use within the last decade. The prevalence of HIV infection among injectors ranges from 2% to 30%. Identifying effective interventional elements that have kept the prevalence of HIV low for the past 7 years among IDUs of Kolkata is thus of public health importance. METHODS: A purposive sample of opioid/opiate users was studied. Primary and secondary data on drug users, law-enforcement environment, records at drug treatment centres, jail admission data related to the 'Narcotic Drug and Psychotropic Substance Act' and interventions in other risk groups were collected. Laboratory tests for HIV, hepatitis B surface antigen and syphilis were done on consenting IDUs (n=129) and non-IDUs (n=120). For univariate and multivariate analysis, IDUs were taken as cases and non-IDUs as controls. RESULT: Of the IDUs, 2% were positive for HIV. No non-IDU was HIV-positive. Significantly more non-IDUs (10% v. 4%, p=0.05) were positive for syphilis. Sharing injection equipment within the past 6 months was reported by 71% of IDUs; sharing partners were stable and ranged from 1 to 3. More IDUs compared to non-IDUs reported being in touch with intervention programmes. The police has been tolerant to needle-syringe exchange and oral sublingual buprenorphine substitution conducted in Kolkata. Unlike in the early 1990s, non-IDUs did not switch to injecting during non-availability of brown sugar in the latter half of the 1990s and instead sought tratment. The availability of high quality heroin (>20%-50%) was low and the proportion of moderate quality heroin (>10%-20%) went up during these times due to increased police seizures. No intervention exists in jails despite the fact that a large number of drug users spend time in jail. CONCLUSION: Stable and few injection equipment-sharing partners of IDUs, launching of early targeted interventions among IDUs and sex workers in the city, police tolerance to harm reduction activities and preference of non-IDUs for detoxification during heroin draught periods have kept HIV prevalence at a low level among drug users of Kolkata for the past 7 years. immediate launching of interventions for drug users in jails seems necessary. Similar multi-pronged strategies with targeted and environmental intervention could work in other settings as well.

Adolescent↗