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Biomedical subjects

P K Julka

Publications and source records attributed to P K Julka.

11 recordsLinked to original sources
PubMed1998

Volume localized in vivo proton MR spectroscopy of breast carcinoma: variation of water-fat ratio in patients receiving chemotherapy.

Results are reported on in vivo volume localized proton magnetic resonance spectroscopy (MRS) of patients (n = 44) suffering from carcinoma of the breast, using a bilateral breast surface coil. Localized proton MR spectra of the unaffected contralateral breast of these patients are dominated by resonances arising from fat and are similar to the breast tissue from normal volunteers (controls, n = 13), while in the malignant breast tissues the water resonance dominates. On the other hand, the water suppressed proton MR spectra of malignant breast tissue reveal several metabolites of low concentration including the choline peak around 3.2 ppm and other resonances attributable to purine and pyrimidine nucleotides, in the 8.5 ppm region. Elevated water- fat (W-F) ratios are measured in the malignant tissues, compared with the normal breast tissue of controls and from the contralateral unaffected breast tissue of the patients (n = 11). In the case of patients receiving chemotherapy resulting in the reduction of primary tumor size, the W-F ratio shows a statistically significant (P < 0.01) decrease compared with the pre-therapy value, thus providing a non-invasive indicator of favourable clinical outcome of neoadjuvant chemotherapy for locally advanced breast cancer. The method provides the potential for non-invasively monitoring and assessing the response of breast cancer to neoadjuvant chemotherapy.

Adult↗
PubMed1998

Radiation therapy in pseudotumour haemarthrosis.

Total or partial deficiency of factor VIII and IX in the coagulation cascade leads to haemophilia. Haemophilia affecting weight-bearing joints gives a 'pseudotumour' or haemarthrosis-like condition. Surgery and cryoprecipitate infusions have been the treatment for this condition. Radiocolloids and radiation therapy have been used with some benefit. One case of ankle pseudotumour which was treated by low-dose external beam radiation is presented here.

Adolescent↗
PubMed1998

Human leucocytic antigens (HLA) in breast cancer.

HLA frequencies of fifty (50) female breast cancer patients were compared with 200 age matched female controls. A total of 20 HLA-A locus, 35 HLA-B locus and 8 HLA-C locus antigens were studied. The HLA-A2, A11, Aw19 and A30; HLA-B8, B14 and HLA Cw6 were found significantly higher than the controls. The HLA-A11, HLA-Aw19 and HLA-B8 were found protective whereas, HLA-A2, HLA-B14 and HLA-Cw6 were a risk for breast cancer. The prective antigens' probable involvement through immunogenic mechanism in breast cancer is emphasized in this article.

Adult↗
PubMed1994

Case report: giant cell tumour of metacarpals: report of three cases.

Giant cell tumour of the metacarpal bone is rare. We have encountered three cases during the last 30 years. Surgical treatment is difficult in such a critical site and is always associated with functional deformities and poor cosmesis. We have successfully treated two males and one female with lesions of the 1st, 2nd and 4th metacarpal bones using a Theratron-60 telecobalt machine. The radiation dose delivered was 50-55 Gy over 4.5-5 weeks. The three patients all tolerated radiotherapy treatment well, though moderate radiation dermatitis (Grade II-III) was seen. The regression of tumour mass started after about 2 months of radiation therapy and complete regression occurred after several months. The pain subsided immediately. Long follow up of 7-11 years revealed no signs of local recurrence, distant metastasis or radiation induced malignancy. The results of radiation therapy are excellent in terms of functional integrity and cosmesis.

Adult↗
PubMed1993

Primary Hodgkin's disease of small intestine: a report of two cases.

Two patients with primary Hodgkin's disease of the small intestine are reported because of rarity of this condition. Both patients presented with primary intestinal symptoms and were diagnosed after surgical resection. The modalities of treatment and favorable long term survival are presented.

Adult↗
PubMed1990

Radiation treatment of osteoclastoma.

JC:------------ABSTRACT------------------------- P4 Osteoclastoma seen between 1965 and 1984 is presented. All patients received megavoltage therapy using Telecobalt. Tumour dose of 45 Gy to 55.3 Gy in 15 to 18 fractions had been delivered. All patients had quantitation of pre-treatment tumour volume and post-treatment response using a radiographic grid. CT scan measurements have complimented the grid quantitation in recent years. Follow through visits from 5 to 24 years post-treatment (mean follow up 9.2 years) have shown optimum tumor regression, bone recalcification and restitution of joint functions amongst these patients. No case of bone sarcoma has been detected. Our observations lead us to support megavoltage radiation therapy as the treatment of choice for accessible and inaccessible osteoclastoma.

Adolescent↗
PubMed1989

Optimum radiation technique for retinoblastoma in conserved eyes.

The study evaluated 121 consecutive unoperated cases of retinoblastoma in children. They received radiation as the primary treatment for their ocular disease. The stage grouping was done according to Reese classification. Ninety four children had their disease evaluated by CT scan. All except one had imaged lesions in both eyes. In addition, twenty six had thickened optic nerves and twenty one showed chiasmal infiltration. Radiation field selection was based on clinical and CT imaged disease. A tumor dose of 4500c Gy in 16 to 19 fractions over 18 to 24 days was delivered by cobalt teletherapy. The target volume encompassed ora serrata anteriorly and optic chiasma posteriorly in all cases. Tumor response and patient survival was correlated with the initial stage and radiation factors utilised amongst them. Encouraging results were obtained using three field radiation technique with an open anterior field and a TDF between 75 and 90.

Child↗
PubMedDate not supplied

Iron overload augments 7,12-dimethylbenz(a)anthracene-initiated and 12-O-tetradecanoylphorbol-13-acetate-promoted skin tumorigenesis.

Reactive oxygen species and free radicals have been implicated in the multistep cutaneous chemical carcinogenesis. Much of the experimental evidence in this regard is indirect and is based on observations that prooxidant status usually enhances and antioxidant treatments generally inhibit tumor yield. Iron overload is known to enhance peroxidative damage and cause oxidative stress. In this study, we report that iron overload augments 12-O-tetradecanoylphorbol-13-acetate (TPA)-mediated cutaneous tumor promotion. Female Swiss mice were subjected to iron overload by injecting 1 mg iron/ mouse/day consecutively for 2 weeks. Tumors were initiated by applying a single dose of 7,12-dimethylbenz(a)anthracene and promoted with twice weekly applications of TPA for 20 weeks and the appearance of first tumor (latency period), percent incidence and number of tumors per mouse were recorded. It has been observed that the level of iron in involved (tumor-bearing) skin was about fourfold higher as compared to uninvolved (non-tumor) skin of iron overload animals and about tenfold higher as compared to the iron level in the skin of normal animals. When compared to the iron-unloaded control group, the iron overload mice showed an increased incidence of tumors. In iron overload animals, the tumors appeared 3 weeks earlier and also the number of tumors per mouse was significantly higher (2.5-fold). These data indicate that iron overload augments TPA-mediated tumor promotion. We propose that oxidative stress generated by iron overload may be responsible for the augmentation of cutaneous tumorigenesis.

9,10-Dimethyl-1,2-benzanthracene↗