276
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277
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Chaturvedi A, Laha NN, Raman R. Viral hepatitis and blood groups. THE JOURNAL OF THE ASSOCIATION OF PHYSICIANS OF INDIA 1990; 38:671-2. [PMID: 2266097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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278
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Francis P, Raman R, Korula P, Korah I. Pneumatization of the paranasal sinuses (maxillary and frontal) in cleft lip and palate. ARCHIVES OF OTOLARYNGOLOGY--HEAD & NECK SURGERY 1990; 116:920-2. [PMID: 2378718 DOI: 10.1001/archotol.1990.01870080042012] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A comparative study of roentgenograms of the paranasal sinuses between 37 patients with cleft lip and palate and 37 control subjects of the same age group was done using a planimeter. The results indicate that there is no statistical difference in the sizes. The paranasal sinuses increased in size with age in patients as well as in control subjects.
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279
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280
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Ghose T, Lee CL, Fernandez LA, Lee SH, Raman R, Colp P. Role of 1q trisomy in tumorigenicity, growth, and metastasis of human leukemic B-cell clones in nude mice. Cancer Res 1990; 50:3737-42. [PMID: 2160324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In order to investigate the association between various karyotypes of human tumor cells and biological behavior of tumors such as tumorigenicity, rate of growth, and the capacity to form metastasis, six chromosomally distinctive clones were isolated from an Epstein-Barr virus-transformed human chronic lymphocytic leukemic B-cell line which progressively grew and metastasized in irradiated nude mice. When inoculated into nude mice one clone (D10-1) with the karyotype of 46,XY,dup(1)(q11----q32) was more tumorigenic, grew faster, and produced more metastases than the other five clones. When mixtures of different clone-derived cells were grown in vitro or inoculated s.c. into nude mice the proportion of D10-1 cells was higher than their expected numbers in the cultures, s.c. tumors, and splenic and lymph nodal metastases. The growth and metastatic potential of the D10-1 clone were inhibited when cells from this clone were mixed with one or more clones that had slower growth. Duplication of 1q has been observed as a secondary aberration in human hematological malignancies and solid cancers. Our results demonstrate that duplication of the chromosome segment of 1q11----1q32 is associated with advantages in proliferation and metastasis formation.
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MESH Headings
- Animals
- Cell Cycle
- Cell Transformation, Viral
- Chromosomes, Human, Pair 1
- Herpesvirus 4, Human
- Humans
- Karyotyping
- Leukemia, Lymphocytic, Chronic, B-Cell/genetics
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Mice
- Mice, Nude
- Neoplasm Metastasis
- Neoplasm Transplantation
- Trisomy
- Tumor Cells, Cultured/pathology
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281
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Kurien M, Raman R, Job A. Roentgen examination of maxillary sinus, antral puncture and irrigation--a comparative study. Singapore Med J 1989; 30:565-7. [PMID: 2635402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The various radiological findings of maxillary sinus were compared to those at antral puncture and irrigation in patients with chronic maxillary sinusitis. It was noted that roentgen findings of opacity and fluid level of the maxillary sinus are definite evidences of sinus infection and a mucosal thickening is not an indication of sinus infection.
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282
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Raman R. Slow-intensity diathermy for juvenile laryngeal papillomas. ARCHIVES OF OTOLARYNGOLOGY--HEAD & NECK SURGERY 1989; 115:749. [PMID: 2719834 DOI: 10.1001/archotol.1989.01860300103027] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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283
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Kurien M, Seshadri MS, Raman R, Sen Bhanu T. Inherited nasal and laryngeal degenerative chondropathy. ARCHIVES OF OTOLARYNGOLOGY--HEAD & NECK SURGERY 1989; 115:746-8. [PMID: 2719833 DOI: 10.1001/archotol.1989.01860300100026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Four rare cases of congenital saddle-nose deformity and slowly progressive degeneration of laryngeal cartilages with stenosis are described. The term inherited degenerative chondropathy is suggested for this disease entity. To our knowledge this is the first article on such a disease.
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284
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Raman R, Kumar V, Arianayagam S, Peh SC. A unilateral mesenchymal disorder of the head. J Craniomaxillofac Surg 1989; 17:143-5. [PMID: 2708537 DOI: 10.1016/s1010-5182(89)80088-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A hitherto undescribed group of lesions consisting of cystic bony lesions, exostosis, fibromatous lesion, unilateral tonsillar hypertrophy, epidermoid cyst (cholesteatoma) and hyperplasia of the mandible confined to the left side of the face is reported. The case may represent a variant of the Proteus syndrome.
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285
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Raman R, Devanandan MS. Muscle receptors: content of some of the extrinsic and intrinsic muscles of the larynx in the bonnet monkey (Macaca radiata). Anat Rec (Hoboken) 1989; 223:433-6. [PMID: 2469361 DOI: 10.1002/ar.1092230413] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The number of muscle receptors and in particular the muscle spindle content of some of the intrinsic and extrinsic laryngeal muscles was evaluated, using bonnet monkeys (Macaca radiata). The technique of Barker and Ip [J. Physiol. (Lond) 169:73-74, 1963] was used to stain the muscle receptors. The results indicate that the intrinsic laryngeal muscles were devoid of muscle spindles. The extrinsic laryngeal muscles that were examined contain muscle spindles, though their density is less than that reported in the spindle-rich muscles like the rotators of the head and some of the intrinsic muscles of the hand (Cooper in: Structure and Function of Muscle, Vol. I, G.H. Bourne, ed, Academic Press, New York and London, 1960).
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286
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Jayalakshmi P, Pathmanathan R, Raman R, Prasad U. Microscopically diagnosed head and neck cancers in the University Hospital, Kuala Lumpur. THE MEDICAL JOURNAL OF MALAYSIA 1989; 44:58-63. [PMID: 2626114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A retrospective study of 1000 cases of microscopically diagnosed head and neck cancers in the University Hospital, Kuala Lumpur was done. Head and neck neoplasms comprise 7.1% of all tumours diagnosed in this Hospital and the commonest sites of involvement are the nasopharynx (29.1%), cervical lymph nodes (22.6%), oral cavity (10.2%), thyroid (8.2%) and skin (6.5%). Histologically, 87% of tumours are epithelial in nature. The results of this study show that nasopharyngeal carcinoma is commonest in Chinese males, while oral and laryngeal malignancies occur more frequently in Indians.
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287
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Raman R. Vasomotor rhinitis--atrophic rhinitis: two ends of an autonomic spectrum. Singapore Med J 1989; 30:94-6. [PMID: 2595396] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A hypothesis is put forward based on clinical observations and treatment modalities in vasomotor non-allergic rhinitis (V.M.R.) and primary atrophic rhinitis (P.A.R.). The hypothesis postulates that (1) V.M.R. and P.A.R. are two diseases at the ends of an autonomic spectrum (2) The anterior nasal aperture, its dimensions and sensory receptors play a vital role in the etiopathogenesis of both the conditions through reflex autonomic action.
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288
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Thomas A, Raman R. A comparative study of the pneumatization of the mastoid air cells and the frontal and maxillary sinuses. AJNR Am J Neuroradiol 1989; 10:S88. [PMID: 2505592 PMCID: PMC8333939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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289
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Raman R, Dahalil MHJ. Septoplasty kit. Indian J Otolaryngol Head Neck Surg 1988. [DOI: 10.1007/bf02992612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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290
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Raman R, Singh AP, Nanda I. DNase I nick translation in situ on meiotic chromosomes of the mouse, Mus musculus. J Cell Sci 1988; 90 ( Pt 4):629-34. [PMID: 3267016 DOI: 10.1242/jcs.90.4.629] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
DNase-I-sensitive sites have been located on the meiotic chromosomes of the mouse, Mus musculus, by the in situ DNase I nick-translation method. We find that: (1) of all the cell types studied, pachytene nuclei are the most sensitive to DNase I; (2) in diplotene the nicks occur preferentially in the vicinity of chiasmata; (3) the sex chromosomes are also sensitive to the enzyme despite their transcriptional quiescence; and (4) in the sex bivalent the nicks are primarily observed in the putative region of recombination. We conclude that, in addition to discriminating between the transcriptionally active and inactive states of chromatin, DNase I identifies recombination-specific chromatin changes in meiotic prophase.
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291
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Raman R. Laryngeal examination. ARCHIVES OF OTOLARYNGOLOGY--HEAD & NECK SURGERY 1988; 114:578-9. [PMID: 3355703 DOI: 10.1001/archotol.1988.01860170108031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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292
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293
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Rupa V, Raman R. Recurrent antral polyp through antrostomy. ARCHIVES OF OTOLARYNGOLOGY--HEAD & NECK SURGERY 1988; 114:465. [PMID: 3348908 DOI: 10.1001/archotol.1988.01860160109035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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294
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Khanijow VK, Raman R. Idiopathic sudden sensorineural deafness--an approach to the problem. Singapore Med J 1988; 29:76-7. [PMID: 3406777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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295
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Abstract
SummaryAn alternative theoretical neuro-mechanical hypothesis is presented in the pathogenesis of middle ear effusion, along with a review.
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296
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Lee ST, Raman R, Tay A. Benign lymphoepithelial lesion of the submandibular glands. Otolaryngol Head Neck Surg 1987; 97:580-2. [PMID: 3155441 DOI: 10.1177/019459988709700611] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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297
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Raman R, Dahalil MHJ. Teaching aids for some minor ENT procedures. Indian J Otolaryngol Head Neck Surg 1987. [DOI: 10.1007/bf03024761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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298
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299
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Lee ST, Jayalakshmi P, Raman R. Non-Hodgkins lymphoma of lingual tonsil--a case report. Singapore Med J 1987; 28:363-5. [PMID: 3423808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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300
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Dubey DD, Raman R. Factors influencing replicon organization in tissues having different S-phase durations in the mole rat, Bandicota bengalensis. Chromosoma 1987; 95:285-9. [PMID: 3622082 DOI: 10.1007/bf00294785] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
In order to identify factors affecting the length of S-phase in mammals, DNA fibre autoradiograms from different tissues [bone marrow, phytohaemagglutinin (PHA)-stimulated spleen lymphocytes and whole body cells of new-borns] of the mole rat, Bandicota bengalensis, were examined for various parameters of replicon organization. The duration of S-phase in bone marrow and spleen was 12-14 h while that in new-borns was 8-9 h. Fork migration rate was significantly greater in new-borns than in bone marrow, and replicon size was significantly smaller in new-borns than in spleen. Thus it appears that several factors contribute, to varying degrees, in establishing the duration of S-phase in any cell type. In about 20% of the replicon clusters, constituent replicons were found to initiate replication asynchronously. This asynchronous initiation could possibly be due to an effect of transcription on time of initiation since it is likely that neighbouring replicons would be transcribed to different extents.
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