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1.
Endocr Pract ; 29(6): 441-447, 2023 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-36965657

RESUMEN

OBJECTIVE: This study aimed to evaluate the effectiveness of the Vivovitals diabetes platform in improving glycemic control and reducing hemoglobin A1c (HbA1c) levels in patients with uncontrolled type 2 diabetes mellitus by providing more accessible and direct patient care under the monitoring and oversight of their physician. METHODS: This 12-week, prospective, pragmatic, single-center, double-arm study assessed the impact of the Vivovitals diabetes platform on glycemic control in 78 adults aged ≥18 years with HbA1c levels of ≥7.5% (58 mmol/mol) at baseline. The participants were randomized into 2 groups. The control group received usual clinical care, whereas the intervention group was provided with a smartphone-linked telehealth application, a preconfigured glucometer, and access to a glycemic reading diary. The blood glucose levels of the intervention group were transmitted to the providers daily. Patients whose blood glucose level was <70 mg/dL or >180mg/dL were contacted, and modifications were made to their diet and medication. The 2 groups were compared at the baseline and at 12 weeks using nonparametric tests, with P <.05 considered statistically significant. RESULTS: Over 12 weeks, the average HbA1c level in the control group reduced by 0.474% (P = .533; 95% CI, -0.425 to -0.523), whereas the average HbA1c level in the intervention group reduced by 1.70% (P = .002; 95% CI, -1.02 to -2.39). The estimated treatment difference was expressed using Cohen d, which yielded 0.62. After 12 weeks, the HbA1c values between the control and intervention groups were statistically significant (P = .001). CONCLUSION: The use of the Vivovitals platform may help to improve glycemic control among individuals with type 2 diabetes mellitus.


Asunto(s)
Diabetes Mellitus Tipo 2 , Adulto , Humanos , Adolescente , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Glucemia , Hemoglobina Glucada , Control Glucémico , Estudios Prospectivos , Monitoreo Fisiológico , Automonitorización de la Glucosa Sanguínea
2.
Endocr Pract ; 22(7): 809-13, 2016 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-27018618

RESUMEN

OBJECTIVE: Vitamin D deficiency is associated with several autoimmune diseases. This study assessed whether vitamin D deficiency is associated with Hashimoto thyroiditis (HT). METHODS: Two groups of patients were selected for which serum 25-hydroxyvitamin D (25(OH)D) levels had been measured: (1) a study group of patients diagnosed with HT as indicated by thyroid antibodies, and (2) a healthy control group. Each group was separated by sex and then controlled for age and body mass index (BMI). Groups' mean 25(OH)D levels were compared by analysis of variance (ANOVA), and percent frequencies of vitamin D sufficiency, insufficiency, and deficiency were compared with a Z-test. The correlations between 25(OH)D levels and thyroid antibodies and thyroid-stimulating hormone (TSH) levels were also tested. RESULTS: The mean 25(OH)D levels for the HT and control groups were significantly different in females (30.75 vs. 27.56 ng/mL, respectively) but not in males (14.24 vs. 13.26 ng/mL). HT females had a higher rate of vitamin D sufficiency (51.7% vs. 31.1%) and a lower rate of insufficiency (48.3% vs. 68.9%) relative to control females. No such differences were found in the male groups. None of the females were vitamin D deficient, but almost all males were. A significant (P = .016) positive correlation (rs = 0.436) between 25(OH)D and TPOAb was observed in males. CONCLUSION: HT is not associated with higher rates of vitamin D deficiency relative to a control group. ABBREVIATIONS: BMI = body mass index HT = Hashimoto thyroiditis 25(OH)D = 25-hydroxyvitamin D TgAb = thyroglobulin antibody TSH = thyroid-stimulating hormone TPOAb = thyroid-peroxidase antibody VDR = Vitamin D receptor.


Asunto(s)
Enfermedad de Hashimoto , Deficiencia de Vitamina D/complicaciones , Adulto , Autoanticuerpos/sangre , Femenino , Enfermedad de Hashimoto/sangre , Enfermedad de Hashimoto/etiología , Humanos , Yoduro Peroxidasa/inmunología , Masculino , Persona de Mediana Edad , Tirotropina/sangre , Vitamina D/análogos & derivados , Vitamina D/sangre
3.
Cureus ; 16(1): e51460, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38298324

RESUMEN

This report examines a case of systemic hypersensitivity to tirzepatide in a patient with type 2 diabetes. Tirzepatide (Mounjaro®), a dual agonist of glucose-dependent insulinotropic polypeptide (GIP) and glucagon-like peptide-1 (GLP-1) receptor, has recently gained FDA approval. Additionally, a literature review was conducted to summarize recent research on tirzepatide's effectiveness and safety. A 67-year-old woman, previously treated with basal insulin, metformin, and semaglutide (a GLP-1 agonist), experienced severe disseminated pruritus and a generalized urticarial rash after her first dose of tirzepatide. This reaction, which subsided with antihistamines, raises questions about possible immunoglobulin E-mediated hypersensitivity. The report highlights the need for increased vigilance regarding allergic reactions to new diabetes medications, particularly in the context of GIP/GLP-1 receptor agonists.

4.
Thyroid ; 33(12): 1414-1422, 2023 12.
Artículo en Inglés | MEDLINE | ID: mdl-37885233

RESUMEN

Background: Treatment with proton pump inhibitors (PPIs) and antacids affects the gastrointestinal absorption of levothyroxine sodium (LT4) tablets. Patients with hypothyroidism taking LT4 and PPIs or antacids, thus, require appropriate monitoring. The objective of this study was to determine whether a soft gelatin capsule of LT4 (Tirosint®) would obviate the effect of PPIs on LT4 absorption. The objective was achieved by assessing the effects of a switch from a conventional LT4 tablet form to the same dose as soft capsules in thyroidectomized patients on treatment with LT4 and PPIs. Methods: Patients with history of hypothyroidism due to total thyroidectomy on stable treatment with LT4 tablets, and with gastrointestinal disease treated with PPIs, were switched to a 12-week treatment with Tirosint at the same dose of the LT4 tablets, while maintaining treatment with PPIs. Serum thyrotropin (TSH) levels were the primary endpoint of the study. Secondary efficacy endpoints were: serum levels of free thyroxine (fT4), total thyroxine (TT4), free triiodothyronine (fT3), total triiodothyronine (TT3), creatine-phosphokinase (CPK), sex-hormone binding globulin, ferritin, angiotensin converting enzyme, and a lipid panel. Results: Forty-seven patients (36 females and 11 males, mean age 55.4 years) were enrolled and 45 of them completed the study (2 patients withdrew consent). During treatment with Tirosint, mean TSH levels demonstrated a statistically significant decrease (mean changes from baseline: -0.32 mIU/L at week 6 and -0.68 mIU/L at week 12) and concomitant increases in thyroid hormone (TH) levels from baseline to week 12, which were statistically significant for fT3 and TT3 (mean changes from baseline: 0.26 pmol/L and 0.10 nmol/L, respectively). Significant decreases of serum low-density lipoprotein, total cholesterol, and CPK levels were observed at week 12. No signs/symptoms arose during the study that could be specifically correlated to either hypo- or hyperthyroidism. Conclusions: In thyroidectomized patients taking PPIs and replacement LT4, a switch from conventional LT4 tablets to LT4 soft capsules at the same dose was associated with a significant decrease in TSH and increase in TH, indicating that LT4 absorption may be less affected by PPIs when given in the form of soft capsules. Clinical Trial Registration: NCT03094416.


Asunto(s)
Hipotiroidismo , Tiroxina , Masculino , Femenino , Humanos , Persona de Mediana Edad , Triyodotironina , Inhibidores de la Bomba de Protones/uso terapéutico , Gelatina/uso terapéutico , Antiácidos/uso terapéutico , Tirotropina , Hipotiroidismo/tratamiento farmacológico , Hormonas Tiroideas/uso terapéutico , Comprimidos/uso terapéutico
5.
Cureus ; 14(4): e24421, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35619860

RESUMEN

In order to determine the prevalence of adherence among diabetes patients treated at Queens Hospital Center's Diabetes Clinic and to determine barriers preventing adherence, 50 patients were asked a series of questions regarding their medication intake. The majority of patients reported that they understood the self-management steps that were necessary in order to control their diabetes. However, 30% of the interviewed patients with type 1 or type 2 diabetes reported that they missed a dose of their diabetes medication on at least one day in the last month. Forgetting and lifestyle inconveniences were the two most frequently reported reasons for non-adherence. Side effects and problems with the pharmacy or insurance were also significant reasons for non-adherence. Adherence can potentially be increased by combining new forms of treatment and increasing educational reinforcement.

6.
Cureus ; 13(5): e15249, 2021 May 26.
Artículo en Inglés | MEDLINE | ID: mdl-34188988

RESUMEN

Evolocumab is a relatively new monoclonal antibody designed to decrease low-density lipoproteins via the inhibition of proprotein convertase subtilisin/kexin type 9 (PCSK9). It is used alone or in combination with other lipid-lowering agents. Evolocumab was associated with adverse events of skin rashes in clinical trials. We describe a rare case of maculopapular exanthema in a female patient with hyperlipidemia, which was treated with evolocumab. The patient was a 60-year-old female with hyperlipidemia who experienced a maculopapular rash after she was administered the second dose of evolocumab subcutaneously. The rash occurred on her torso and upper extremities and was associated with pruritus and mild wheezing. The hypersensitivity reaction was treated with antihistamines and with the discontinuation of evolocumab. The skin eruption cleared within 10 days. In conclusion, medical professionals should be aware of evolocumab skin hypersensitivity reactions, which could demand the cessation of the evolocumab treatment.

7.
Diabetes Metab Syndr ; 15(1): 447-454, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33592371

RESUMEN

BACKGROUND: /Aim: Various reports of the occurrence of type 1 diabetes mellitus (T1DM) in patients with COVID-19 have been published, denoting an association between both diseases. Therefore, we conducted this systematic review to summarize the prevalence of T1DM in COVID-19 patients and to identify the clinical presentations and outcomes in this patient population. MATERIALS AND METHODS: Up to 10/27/2020, Medline, Embase, cochrane and google scholar databases were searched for original studies investigating the association between COVID-19 and T1DM. A manual search was conducted to identify missing studies. The quality of included studies was analyzed by the National Institute of Health (NIH) risk of bias tool. Outcomes included length of hospital stay, hospitalization, intensive care unit (ICU) admission, diabetic ketoacidosis (DKA), severe hypoglycemia, and death. RESULTS: Fifteen studies were included in the qualitative analysis. Included studies reported data of both adult and pediatric patients. The prevalence of T1DM in COVID-19 patients ranged from 0.15% to 28.98%, while the rate of COVID-19 in patients with T1DM ranged from 0% to 16.67%. Dry cough, nausea, vomiting, fever and elevated blood glucose levels were the most commonly reported presentations. The investigated outcomes varied widely among studied populations. CONCLUSIONS: The prevalence of T1DM in patients with COVID-19 ranged from 0.15% to 28.98%. The most common presentation of COVID-19 in patients with T1DM included fever, dry cough, nausea and vomiting, elevated blood glucose and diabetic ketoacidosis. The outcomes of COVID-19 in terms of length of hospital stay, hospitalization, ICU admission, DKA rate, and severe hypoglycemia were reported variably in included studies. Due to the heterogeneous study populations and the presence of many limitations, more studies are still warranted to reach a definitive conclusion.


Asunto(s)
COVID-19/diagnóstico , COVID-19/epidemiología , Diabetes Mellitus Tipo 1/diagnóstico , Diabetes Mellitus Tipo 1/epidemiología , Glucemia/metabolismo , COVID-19/sangre , Diabetes Mellitus Tipo 1/sangre , Humanos , Tiempo de Internación/tendencias
8.
Cureus ; 13(7): e16497, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-34430112

RESUMEN

Reciprocal relationships between viral illness and chronic diseases have been established. Such relationships augment one another and increase the potential harm. The coronavirus 2019 pandemic proved that the most vulnerable populations are the ones with underlying chronic diseases, especially diabetes mellitus. As new data are evolving, viral illnesses, like COVID-19, have been speculated to potentially induce diabetes mellitus. Here we report a 20-year-old male with no past medical history who presented with polyuria, polydipsia, and dry mouth. He was found to have significant hyperglycemia. He had COVID-19-like symptoms a few weeks prior to admission and was tested positive for COVID-19, but the symptoms had resolved prior to his presentation. He was managed with intravenous fluids (IVFs), electrolytes replacement, and insulin. He was diagnosed with new-onset diabetes mellitus likely secondary to a recent COVID-19 infection and was discharged home on insulin, oral antidiabetic medications, and outpatient follow-up with primary care clinic and endocrinology clinic.

9.
Diabetes Metab Syndr ; 15(6): 102268, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34562865

RESUMEN

BACKGROUND AND AIMS: We aim to cover most of the current evidence on the mutual effect of diabetes & COVID-19 infection on each other and the management of the COVID-19 patients with diabetes. METHODS: We utilized databases to review the current evidence related to diabetes mellitus and COVID-19. RESULTS: We discussed the most recent evidence of diabetes milieus and COVID-19 regarding risk factors, management, complications, and telemedicine. CONCLUSION: Diabetes mellitus is associated with a significant risk of complications, extended hospital stays, and mortality in COVID-19 infected patients.


Asunto(s)
COVID-19/epidemiología , Diabetes Mellitus/epidemiología , Hipoglucemiantes/uso terapéutico , SARS-CoV-2/aislamiento & purificación , Telemedicina , Glucemia/análisis , COVID-19/mortalidad , COVID-19/transmisión , COVID-19/virología , Diabetes Mellitus/tratamiento farmacológico , Diabetes Mellitus/mortalidad , Diabetes Mellitus/virología , Humanos , Factores de Riesgo
10.
J Clin Med Res ; 12(8): 492-498, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32849937

RESUMEN

BACKGROUND: In recent decades, data from certain observational studies have stirred controversy over artificial sweeteners by linking them with certain malignancies. As the incidences of artificial sweetener consumption and thyroid cancer are both increasing, our study aimed to determine any possible association between them. METHODS: This retrospective observational study enrolled 50 patients (group 1) with proven diagnosis of well-differentiated thyroid cancer (WDTC) and 50 control subjects (group 2) diagnosed as having benign thyroid nodule by fine-needle aspiration. The survey questionnaire included the total amount and duration of intake of artificial sweeteners. RESULTS: Increased consumption of artificial sweeteners was noted in group 1 as compared to group 2, which was statistically significant (76% vs. 24%, P < 0.01). This study suggested that the use of an average of four packets (4 g) per day of artificial sweetener for an average duration of 5 years is associated with WDTC. CONCLUSIONS: Our study emphasizes the significance of artificial sweetener consumption as a potential risk factor for WDTC and increase in public awareness regarding this association if other studies in future report similar findings.

11.
Cureus ; 11(9): e5634, 2019 Sep 12.
Artículo en Inglés | MEDLINE | ID: mdl-31700737

RESUMEN

Every eleventh adult has diabetes, and every third has prediabetes. Over 95% of diabetics are of type 2. It is well established that diabetes doubles the risk of heart disease and stroke apart from increasing the risk of microvascular complications. Hence, strict glycemic control is necessary. However, it increases the risk of hypoglycemia, especially in patients with longstanding diabetes. Continuous glucose monitors (CGM) use a sensor to continuously measure the glucose levels in the interstitial fluid every 10 seconds and gives out mean values every five minutes. CGMs are emerging tools in the management of type 2 diabetes. The prime objective of this review is to find out if there is enough supporting evidence, suggesting that continuous glucose monitoring is more effective than self-monitoring of blood glucose (SMBG) in type 2 diabetes. We conducted a systematic literature search in Medline (PubMed) looking for any studies addressing our objective. It is observed that there is a varying level of evidence supporting that employing a CGM can reduce glycated hemoglobin (HbA1c), hypoglycemic events, and increase patient satisfaction. However, some studies reported no significant benefits. This systematic review with meta-analysis concludes that the use of CGM in type 2 diabetes mellitus (T2DM) is beneficial, as it significantly reduces HbA1c compared to the usual method of SMBG. The pooled mean difference in HbA1c was -0.25 (-0.45, -0.06) and statistically significant (at p = 0.01) when comparing CGM to SMBG.

12.
Cureus ; 10(7): e2978, 2018 Jul 13.
Artículo en Inglés | MEDLINE | ID: mdl-30237939

RESUMEN

Malignant hypertension (MH) has been described in association with high-dose (50 - 100 mcg) estrogen oral contraceptive pills (OCPs). Although the rise in blood pressure (BP) is usually mild, some women will have a more significant increase in BP, and hypertensive emergencies may very rarely occur. We present a 21-year-old Caucasian female with a past medical history of fibromyalgia and family history of hypertension (both grandparents) who was admitted with a three-day history of headache and blurring of vision in her left eye with a BP of 210/150. Her medications, which were continued on admission, included tramadol, 100 mg twice daily (bid), and low-dose estrogen OCP. During the hospital course, she received different antihypertensive medications and her hypertension was controlled. A diagnosis of MH due to OCP was made. All antihypertensive medications were stopped, except metoprolol, and the patient was discharged home on metoprolol with a BP of 107/55 mmHg. On follow-up in the medical clinic three months later, her visual disturbances had completely resolved and her BP was 98/56 mmHg.  One-third of patients aged 15 - 44 years old who develop MH are likely to be on high-dose estrogen OCP. As far as we know, our case is the third documented case of MH occurring in patients on low-dose estrogen OCP. Chronic use of oral contraceptives will slightly increase the systemic BP in most women. It is advisable to avoid OCP in high-risk patients and do regular BP checks on patients on OCP. In patients presenting with hypertension or MH while on OCP, the OCP should be discontinued.

13.
Cureus ; 10(7): e3019, 2018 Jul 21.
Artículo en Inglés | MEDLINE | ID: mdl-30254808

RESUMEN

Adult-onset Still's disease (AOSD) is a rare diagnosis. In small percentage of cases, AOSD is associated with other autoimmune diseases including schizophrenia. Despite the lack of sufficient studies, both conditions may share similar autoimmune pathogenic pathways. Herein we describe a 36-year-old woman with the past medical history of schizophrenia who presented with spiking fevers, arthralgia, evanescent rash and pleural chest pain. She reported developing these symptoms a while after poor compliance with her antipsychotic medication. On admission, physical examination was remarkable for high-grade fever, maculopapular rash, oligo arthralgia, hepatomegaly and lymphadenopathy. Laboratory investigation revealed leukocytosis with neutrophilia and markedly elevated ferritin. The patient met four out of four major, and three out of five minor Yamaguchi criteria for AOSD. The patient started on therapy with corticosteroid. Soon after, her symptoms resolved and most of her biochemical markers went back to normal. We review the literature on co-existence of AOSD with other autoimmune diseases, we also discuss that there may be a correlation between ceasing antipsychotic medication (with known immunomodulatory effect) in a schizophrenic patient and triggering an auto-inflammatory process such as AOSD in a susceptible host. In addition, we discussed the possible similar autoimmune pathway of schizophrenia to pathogenesis of AOSD.

14.
Cureus ; 10(6): e2804, 2018 Jun 14.
Artículo en Inglés | MEDLINE | ID: mdl-30123726

RESUMEN

Hashitoxicosis is the initial hyperthyroid phase of patients with Hashimoto's thyroiditis and, usually, this phase lasts for one to two months. We report a case of a 21-year-old male who had Hashitoxicosis of two years duration before converting to Hashimoto's hypothyroidism. He initially presented with complaints of increased appetite, heat intolerance, fatigue, and sweating. On a physical exam, he had mild exophthalmos with lid lag and a fine tremor in the hands. Thyroid function tests also confirmed that the patient had hyperthyroidism. Thyroglobulin antibody and thyroid peroxidase antibody were both positive. He also had mildly elevated thyroid-stimulating immunoglobulin (TSI) but decreased radioactive iodine uptake scan. Based on the clinical presentation and biochemical test, a diagnosis of Hashitoxicosis was made. This hyperthyroid phase lasted for a period of two years. The patient eventually developed hypothyroidism suggesting that Hashimoto's thyroiditis was the most likely diagnosis. He was started on levothyroxine replacement therapy and remained euthyroid on levothyroxine since that day. The initial presentation mimicked Grave's disease, but with decreased radioiodine uptake, despite the high TSI level, leading us to treat him medically and not with radioactive iodine therapy. The patient was thus spared unnecessary radioactive iodine therapy (RAI) therapy.

15.
Cureus ; 10(6): e2845, 2018 Jun 20.
Artículo en Inglés | MEDLINE | ID: mdl-30140596

RESUMEN

Biotin is a readily available supplement that is part of the B-complex vitamins. It is an essential co-factor for five carboxylases involved in fatty acid synthesis and energy production. The recommended daily intake (RDI) of biotin ranges from 30 to 70 mcg per day. At high doses (10,000 times RDI), biotin improves clinical outcomes and quality of life in patients with progressive multiple sclerosis (MS). It has been reported to cause interference in immunoassays resulting in abnormal thyroid function tests. Hereby we are describing the case of a patient having MS who was on high-dose biotin, seen in the clinic for a follow-up visit with thyroid function tests suggestive of Graves' disease with no signs and symptoms of hyperthyroidism and completely normal physical examination. In the case we have described, the laboratory measurements suggestive of thyrotoxicosis were attributed to interference of the patient's high-dose biotin treatment with the biotin-streptavidin chemistry of the immunoassays. We observed normalization of the thyroid stimulating hormone (TSH) and free T4 measurements when the patient withheld biotin for a week. As our case illustrates, early consideration of biotin interference minimizes unnecessary repeat laboratory studies. As trials in MS are progressing, we expect to see more patients on high-dose biotin treatment with spurious laboratory measurements. Therefore, we advise careful history taking and close communication with the laboratory when the clinical picture does not match with the laboratory results.

16.
Cureus ; 10(7): e2965, 2018 Jul 11.
Artículo en Inglés | MEDLINE | ID: mdl-30210953

RESUMEN

Hydroxymethyl glutaryl coenzyme A reductase inhibitors (statins) are first-line medication for lowering serum cholesterol levels in the prevention of cardiovascular disease. Angioedema is the swelling of mucosa and submucosal tissue. There are no published cases of drug-induced angioedema involving rosuvastatin. We report a case of a 45-year-old female who presented with episodes of self-resolving edema of face, lips, and tongue after being on rosuvastatin. The patient denied any rash during these episodes and mentioned that self-medication with diphenhydramine did not relieve her symptoms. The patient was hemodynamically stable. The complement component 4 (C4), C1 esterase inhibitor, and complement component 1q (C1q) binding assay were within normal range. Therefore, the diagnosis of hereditary angioedema was effectively ruled out. The temporal relation between rosuvastatin and the development of angioedema and prompt resolution of symptoms after the drug discontinued suggest that rosuvastatin was the most probable culprit in the development of angioedema in our patient.

17.
Cureus ; 10(7): e3050, 2018 Jul 25.
Artículo en Inglés | MEDLINE | ID: mdl-30263879

RESUMEN

Pheochromocytoma is a rare tumor usually arising from the adrenal medulla (strictly speaking, those arising outside the adrenal gland are called paragangliomas). We report a case of pheochromocytoma presenting as orthostatic hypotension and electrolyte imbalance. A 51-year-old woman was admitted because of vomiting and chest pain. She had fluctuating blood pressure (BP) with episodes of orthostatic hypotension. Computed tomography pulmonary angiogram was performed to rule out pulmonary embolism; it showed a clear chest, but an incidental right suprarenal mass. The biochemical analysis supports the diagnosis of pheochromocytoma. Her electrolyte panel revealed persistently low potassium, calcium, and magnesium levels despite aggressive replacement. We speculated that hypotension was mainly due to vasodilatation caused by excess plasma epinephrine and prescribed doxazosin and a nonselective beta-adrenergic blocker which stabilized BP. The right adrenal tumor excised, and postoperatively she remained hemodynamically stable with no hypotensive episode. Laboratory data taken six weeks after surgery show normal 24-hour urine metanephrine and normetanephrine and normal serum magnesium and calcium levels. This case report highlights the variable presentation of pheochromocytoma. We also discuss the probable mechanisms of electrolyte imbalance in our case.

18.
Cureus ; 10(6): e2900, 2018 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-30181932

RESUMEN

When very low or undetectable high density lipoprotein (HDL)-cholesterol (HDL-C) is encountered in clinical practice, a paraproteinemia should be suspected in the absence of genetic or more obvious secondary causes. We reported a case of artifactually low HDL-C in a 68-year-old man with a past medical history of vitamin B12 deficiency. Lipid panel showed total cholesterol (TC) 144 mg/dl, triglycerides (TG) 79 mg/dl, HDL-C 5 mg/dl, and low density lipoprotein (LDL) 123 mg/dl. HDL-C, which was determined three years prior to this presentation was found normal. The patient was prescribed extended release nicotinic acid. Further workup performed showed the ratio of APO B/APO A1 0.36 and direct LDL 28 mg/dl. In the absence of genetic or more obvious secondary causes, we hypothesized that low HDL-C in this patient was due to paraprotein interference in vitro with the liquid homogenous HDL assay. Serum protein electrophoresis demonstrated normal IgG and IgA and an abnormally high IgM at 3510 mg/dl (57-266). A bone marrow biopsy revealed Waldenstrom macroglobulinemia. A diagnostic workup for an isolated low HDL-C unmasking the diagnosis of Waldenstrom macroglobulinemia has been rarely reported. Care must be taken when using the homogeneous method for direct measurement of HDL-C as artifactually undetectable HDL-C might result in the mismanagement of patients with paraproteinemia.

19.
Cureus ; 10(7): e2903, 2018 Jul 01.
Artículo en Inglés | MEDLINE | ID: mdl-30197844

RESUMEN

Familial dysalbuminemic hyperthyroxinemia (FDH) is the most common cause of the inherited increase of serum thyroxine in Caucasians. This disorder occurs due to a missense mutation in the human serum albumin, resulting in an increased affinity of thyroxine to the binding sites on the human serum albumin (HSA) molecule. HSA is a carrier protein of thyroid hormones and only 10% of thyroxine (T4) is bound to human serum albumin, 75% is bound to thyroxine-binding globulin, 15% to transthyretin, and 0.03% is free. The disorder is characterized by a greater elevation of serum thyroxine than triiodothyronine (T3). The high serum concentration of T4 is due to the modification of a binding site located in the N-terminal half of HSA (in subdomain IIA). Arg218 or Arg222 gets replaced with smaller amino acids, such as histidine, proline, or serine, due to missense mutation; this reduces the steric hindrances in the binding site and creates a high-affinity binding site for thyroxine. We herein report a case of FDH with a characteristically elevated total T4 and normal free T4 (measured by equilibrium dialysis).

20.
Cureus ; 10(7): e3014, 2018 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-30254803

RESUMEN

Follicular variant of papillary thyroid carcinoma (FVPTC) presented as an autonomous functioning thyroid nodule is a rare finding. We reported a case of 70-year-old male presented with complaints of palpitation and heat intolerance. On palpation, we found a thyroid nodule of 4 cm in the left lobe. Thyroid function tests revealed hyperthyroidism, and radioactive iodine uptake scan (RAIU) showed increased uptake in the left lobe consistent with a hot nodule. The probability of the benign nature of hyperfunctioning thyroid nodule discussed but patient requested further workup to rule out any remote possibility of thyroid cancer. We performed a fine needle aspiration (FNA), and the cytological examination suggested the possibility of thyroid carcinoma. The patient underwent total thyroidectomy, and histological examination revealed follicular architecture with nuclear features of papillary carcinoma in 1 cm area of the thyroid nodule. In the review of the literature, we identified the following seven cases of FVPTC arising within a hyperfunctioning thyroid nodule.

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