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N A Othieno-Abinya

Publications and source records attributed to N A Othieno-Abinya.

14 recordsLinked to original sources
PubMed2005

Hodgkin's lymphoma in the 1990s: a Kenyatta National Hospital experience.

OBJECTIVE: To re-evaluate clinico-pathologic categorisation of patients with Hodgkin's lymphoma, treatments offered and their appropriateness, and outcome of this disease at Kenyatta National Hospital in the 1990s. DESIGN: Retrospective survey of Hodgkin's lymphoma patients aged 13 years and above at the Kenyatta National Hospital. SETTING: Kenyatta National Hospital, Nairobi, Kenya. SUBJECTS: Patients aged 13 years and above, with diagnosis of Hodgkin's lymphoma. RESULTS: There were 75 males and 36 females. One case had no clear gender details. 14.2% of the cases were of lymphocyte predominant histologic subtype, 23.6% nodular sclerosis, 26.4% mixed cellularity and 17% Lymphocyte depletion (Rye Modification of Lukes and Butler Classification). Disease stages IIIB, IVA and IVB (Ann Arbor) were found in 24.5% of the cases. The majority of the patients (60.3%) were treated with the COPP protocol and 17% with ABVD. Complete remission was realised in 56% of the cases and most cases were lost to follow-up, making it difficult to correlate survival with known prognostic parameters, apart from early stage disease and attainment of complete remission which correlated with prolonged durations of follow-up. CONCLUSION: The patients had earlier stage diseases than in earlier studies locally, the histologic classification is still wanting, and the COPP protocol appeared still popular instead of being abandoned. Response rates were lower than expected and losses to follow-up made it difficult to properly evaluate prognostic parameters. Early disease stage and attainment of complete remission appeared to correlate with longer follow-up duration.

Adolescent↗
PubMed2004

Non-Hodgkin's lymphomas at Kenyatta the National Hospital Nairobi in the 1990's.

OBJECTIVES: To determine the clinico-pathologic and prognostic factors, treatment and outcome of non-Hodgkin's lymphomas as seen at the Kenyatta National Hospital in the 1990s. DESIGN: Retrospective study of patients with non-Hodgkin's Iymphoma. SETTING: Kenyatta National Hospital, Nairobi, Kenya, between January 1990 and January 2000 inclusive. SUBJECTS: Patients aged 13 years and above, with non-Hodgkin's Iymphomas. RESULTS: Case records were available for 207 patients, 146 males and 60 females, with one having had gender not clarified. Fifty two per cent of the patients were aged less than 40 years and 18.4% over 60 years. Forty one per cent were not properly classified histologically, seventy patients out of 190 evaluable (36.8%) had stages IVA and IVB disease at diagnosis. Twenty five out of 77(32.5%) tested positive for HIV infection, none of them being of the indolent variety. Up to 57.1% of cases of Burkitt's lymphoma tested positive for HIV infection. Cyclophosphamide, doxorubicin, vincristine and prednisone, (CHOP) chemotherapy was given to 68.7% of the patients with complete remission rates of 55.6% for those who got a minimum of six courses of chemotherapy. Only 15.3% of 105 patients evaluable were followed up for 36 months and above, the majority of patients having been lost to follow-up. Poor performance status at diagnosis correlated with shorter follow-up durations (p<0.05). CONCLUSION: A good percentage of the patients were not comprehensively characterized pathologically. Standard treatment was offered to the majority of patients, and those who could afford to purchase the medicines stood good chance of achieving complete remission. Poor performance status at diagnosis correlated with shorter follow-up durations and early stage disease correlated with longer follow-up durations. Overall, the outlook for NHLs treated at KNH in the 1990s appears to have improved tremendously.

Adolescent↗
PubMed2002

Chronic myeloid leukaemia at the Kenyatta National Hospital, Nairobi.

OBJECTIVE: To determine the clinical and haematological factors associated with treatment and outcome of chronic myeloid leukaemia (CML) at Kenyatta National Hospital. DESIGN: Retrospective survey of patients treated for chronic myeloid leukaemia. SETTING: Kenyatta National hospital, Nairobi, Kenya, between April 1990 and August 2000. SUBJECTS: Patients with chronic myeloid leukaemia. RESULTS: One hundred and four patients, 55 males and 49 females, age range 10-72 years with a median age of 35 years. Treatment with busulphan getting less popular in favour of hydroxyurea. Median follow-up 20 months with none of the clinical and haematological parameters impacting significantly on duration of follow-up. CONCLUSION: CML occurs at a younger age-group in Kenya, and none of the clinical or haematological parameters appears to impact on follow-up duration.

Adolescent↗
PubMed2002

Postsurgical management of patients with breast cancer at Kenyatta National Hospital.

OBJECTIVE: To assess post-surgical management of patients with breast cancer at the Kenyatta National Hospital. DESIGN: Retrospective analysis of patients treated for breast carcinoma at Kenyatta National Hospital between January 1989 and January 2000. SETTING: Kenyatta National Hospital. SUBJECTS: Three hundred and seventy-four patients who had surgery or biopsy for breast cancer at the Kenyatta National Hospital. INTERVENTION: Chemo-hormonal therapy and/or radiotherapy for adjuvant, metastatic, or palliative purposes. RESULTS: Twenty-two patients received adjuvant chemotherapy, and 21 patients received chemotherapy for metastatic disease. Forty-six patients received adjuvant radiotherapy and 53 had radiotherapy for palliative purposes. One hundred and twenty-six patients were given tamoxifen for adjuvant and metastatic purposes. The median duration of follow-up was 20 months. CONCLUSION: Chemotherapy is grossly underutilized in the treatment of breast cancer at the Kenyatta National Hospital, and radiotherapy is also underutilized. Follow-up durations are dismal and if this is used as a surrogate measure for survival then survival durations for breast cancer patients are also dismal at the Kenyatta National Hospital.

Adolescent↗
PubMed2001

Nadir neutrophil counts in patients treated for breast cancer with doxorubicin and cyclophosphamide.

OBJECTIVE: To determine the impact on neutrophils if adriamycin is administered at 60 mg/m2 and cyclophosphamide at 600/m2 (AC 60/600); and at 50 mg/m2 and 500 mg/m2 (50/500) in the treatment of breast cancer. DESIGN: Restrospective analysis of nadir neutrophil counts in female mammary carcinoma patients treated with adriamycin/cyclophosphamide combination. SETTING: Hurlingham Oncology Clinic, Nairobi and The Nairobi Hospital between March 1995 and August 1999. SUBJECTS: Eighteen patients with breast cancer were treated either for adjuvant purposes or for metastatic disease. INTERVENTION: Chemotherapy with adriamycin and cyclophosphamide at 60/600 or 50/500. Patients were advised to avoid crowded places and given prophylactic broadspectrum antibiotics whenever grade 4 neutropenia occurred at nadir. RESULTS: Grade 3-4 neutropenia occurred in 75.5% of treatments at 60/600 and in 56.8% of the treatments at 50/500. Febrile neutropenia followed only one treatment and did not result in death. CONCLUSION: Neutropenia is frequent and severe at A/C 60/600 and need to be watched out for. Sepsis on the other hand is prevented if meticulous attention is given and corrective measures taken. A/C 50/500 was associated with less occurrences of neutropenia though still very high. Neutropenia should therefore be checked and steps be taken to prevent sepsis even at this dosage.

Adult↗
PubMed2001

Experience with vincristine--associated neurotoxicity.

OBJECTIVES: To evaluate the frequency and severity of occurrence of vincristine-associated neurotoxicity. DESIGN: A retrospective case series study. SETTING: Hurlingham Oncology Clinic, Nairobi. SUBJECTS: Thirty-eight patients treated for various neoplasms with vincristine containing chemotherapeutic regimens. MAIN OUTCOME MEASURES: The frequency and degree of neurotoxicity when vincristine was given at the standard dose of 1.4 mg/m2. RESULTS: Five patients (13.2%) developed peripheral neuropathy, one having had it even before vincristine was started. Therefore only four (10.5%) had it attributed to vincristine. Four of the patients who developed neuropathy (80%) were HIV-positive. Neuropathy grade 2 (severe) occurred in only two patients leading to discontinuation of the drug. All the neurotoxicity resolved after discontinuation of vincristine. CONCLUSION: Vincristine induced neuropathy occurred but was rarely severe at a dose of 1.4 mg/m2. It appeared to be more frequent in HIV infected individuals, but controlled studies with bigger sample sizes are required to determine whether this may warrant routine capping of the dose at a maximum of 2 mg.

Adolescent↗
PubMed1999

Cutaneous basal cell carcinoma in Kenya.

BACKGROUND: Primary basal cell carcinoma(BCC) of the skin is the commonest tumour in Caucasians. Its incidence and mode of presentation in Kenyan Africans are unknown. OBJECTIVE: To study the incidence and mode of presentation of BCC in Kenya. DESIGN: A thirty year retrospective study (1968-1997) of all BCCs documented in the Kenya Cancer Registry (KCR), and a case report of one patient seen at Kenyatta National Hospital (KNH), Nairobi. RESULTS: Seventy four BCCs were recorded in thirty five Caucasians and thirty nine Africans. The race-specific mean annual incidence rates per million population were 58.5 and 0.065 for Caucasians and Africans, respectively. Clinical presentation in both racial groups was similar. CONCLUSION: BCC is a rare malignant tumour in Kenyan Africans but its mode of clinical presentation is similar to that in Caucasians.

Adolescent↗
PubMed1997

Ageing and cancer.

The process of carcinogenesis is complicated and in most cases requires several steps of cellular transformation resulting from various molecular signals brought about by interactions between carcinogens and the cellular genome. Cancers in which cellular transformation does not require numerous processes tend to occur in younger age groups while cancers of the advancing age tend to be those in which the process of cellular transformation occurs through complex molecular processes that require ample time for induction.

Age Distribution↗
PubMed1996

The consistent association between Epstein-Barr virus and Hodgkin's disease in children in Kenya.

Recent studies have suggested that Epstein-Barr virus (EBV) may play a role in the etiology of Hodgkin's disease (HD). In a previous study, we used a latent membrane protein 1 (LMP1)-specific antibodies to examine archival material from 74 British children with HD and found 50% of cases to be positive. It is known that there are geographic and ethnic variations in the incidence of HD. We have investigated LMP1 status in formalin-fixed, paraffin wax-embedded lymph nodes with HD involvement from 53 children and 48 adults from Kenya using immunohistochemical staining. We also developed sensitive and specific in vitro gene amplification protocols for examining the EBV strain type in such material using several combinations of primers derived from the EBNA 2 and EBNA 3 coding regions. LMP1 positivity was present in 100% of the pediatric cases (two lymphocyte-predominant, 25 nodular sclerosis, 16 mixed cellularity, 5 lymphocyte depletion, and 5 unclassified) and in 66% of the adult cases (two of three lymphocyte-predominant, 26 of 39 nodular, sclerosis, two of two mixed cellularity, and two of four lymphocyte depletion). Tests to type the EBV strain were undertaken in 25 EBV-positive pediatric cases. A combination of type-specific polymerase chain reactions for EBNA 2 and EBNA 3C genes indicated that seven patients had type 1, eight had type 2, and 10 had dual infections with both types. Five cases with dual infections were further investigated using a sensitive in situ hybridization for the EBV-encoded, small nuclear nonpolyadenylated RNAs (EBERs). EBER transcripts were detected in Reed-Sternberg and Hodgkin cells and in occasional infiltrating lymphocytes. These observations indicate that in Kenya EBV is consistently associated with pediatric cases of HD, and that biopsies from a number of such cases appear to carry both type 1 and type 2 viral sequences.

Adolescent↗