Effect of diagnostic delay on survival in patients with colorectal cancer: a retrospective cohort study.

BACKGROUND: Disparate and contradictory results make studies necessary to investigate in more depth the relationship between diagnostic delay and survival in colorectal cancer (CRC) patients. The aim of this study is to analyse the relationship between the interval from first symptom to diagnosis (SDI) and survival in CRC. METHODS: Retrospective study of n = 942 CRC patients. SDI was calculated as the time from the diagnosis of cancer and the first symptoms of CRC. Cox regression was used to estimate five-year mortality hazard ratios as a function of SDI, adjusting for age and gender. SDI was modelled according to SDI quartiles and as a continuous variable using penalized splines. RESULTS: Median SDI was 3.4 months. SDI was not associated with stage at diagnosis (Stage I = 3.6 months, Stage II-III = 3.4, Stage IV = 3.2; p = 0.728). Shorter SDIs corresponded to patients with abdominal pain (2.8 months), and longer SDIs to patients with muchorrhage (5.2 months) and rectal tenesmus (4.4 months). Adjusting for age and gender, in rectum cancers, patients within the first SDI quartile had lower survival (p = 0.003), while in colon cancer no significant differences were found (p = 0.282). These results do not change after adjusting for TNM stage. The splines regression analysis revealed that, for rectum cancer, 5-year mortality progressively increases for SDIs lower than the median (3.7 months) and decreases as the delay increases until approximately 8 months. In colon cancer, no significant relationship was found between SDI and survival. CONCLUSIONS: Short diagnostic intervals are significantly associated with higher mortality in rectal but not in colon cancers, even though a borderline significant effect is also observed in colon cancer. Longer diagnostic intervals seemed not to be associated with poorer survival. Other factors than diagnostic delay should be taken into account to explain this "waiting-time paradox".

Primary melanoma of the adrenal gland: a case report and review of the literature.

BACKGROUND: Primary melanoma of the adrenal gland is exceptionally rare as demonstrated by the few cases reported in the medical literature, and it has a high fatality rate. We present the case of a patient with two relapses and survival to date. CASE REPORT: We describe the case of a 58-year-old Caucasian woman who consulted her doctor with symptoms of asthenia, anorexia and weight loss. A mass was palpated in her abdomen at the height of the left hypochondrium. A computed tomographic scan revealed a retroperitoneal mass measuring 10 cm × 15 cm originating in the left adrenal gland. A left nephroadrenalectomy and splenectomy were performed. Histopathologically, the retroperitoneal mass corresponded to a melanoma, and no primary melanoma was found in any other location. The patient was treated with interferon-α-2b. Three years after her diagnosis the patient presented with a retroperitoneal relapse of the mass measuring 7.2 cm, which was removed. Five years after the first relapse a new retroperitoneal relapse mass was diagnosed, which was also removed. Since then the patient has been healthy and free from illness. CONCLUSION: Histological and immunohistochemical studies, together with the criteria described by Ainsworth et al. and Carstens et al., allowed us to diagnose primary melanoma of the adrenal gland.

Diagnosis delay and follow-up strategies in colorectal cancer. Prognosis implications: a study protocol.

BACKGROUND: Controversy exists with regard to the impact that the different components of diagnosis delay may have on the degree of invasion and prognosis in patients with colorectal cancer. The follow-up strategies after treatment also vary considerably. The aims of this study are: a) to determine if the symptoms-to-diagnosis interval and the treatment delay modify the survival of patients with colorectal cancer, and b) to determine if different follow-up strategies are associated with a higher survival rate. METHODS/DESIGN: Multi-centre study with prospective follow-up in five regions in Spain (Galicia, Balearic Islands, Catalonia, Aragón and Valencia) during the period 2010-2012. Incident cases are included with anatomopathological confirmation of colorectal cancer (International Classification of Diseases 9th revision codes 153-154) that formed a part of a previous study (n = 953).At the time of diagnosis, each patient was given a structured interview. Their clinical records will be reviewed during the follow-up period in order to obtain information on the explorations and tests carried out after treatment, and the progress of these patients.Symptoms-to-diagnosis interval is defined as the time calculated from the diagnosis of cancer and the first symptoms attributed to cancer. Treatment delay is defined as the time elapsed between diagnosis and treatment. In non-metastatic patients treated with curative intention, information will be obtained during the follow-up period on consultations performed in the digestive, surgery and oncology departments, as well as the endoscopies, tumour markers and imaging procedures carried out.Local recurrence, development of metastases in the follow-up, appearance of a new tumour and mortality will be included as outcome variables.Actuarial survival analysis with Kaplan-Meier curves, Cox regression and competitive risk survival analysis will be performed. DISCUSSION: This study will make it possible to verify if the different components of delay have an impact on survival rate in colon cancer and rectal cancer. In consequence, this multi-centre study will be able to detect the variability present in the follow-up of patients with colorectal cancer, and if this variability modifies the prognosis. Ideally, this study could determine which follow-up strategies are associated with a better prognosis in colorectal cancer.