Corrigendum: Common pitfalls in the interpretation of endocrine tests.

[This corrects the article DOI: 10.3389/fendo.2021.727628.].

Common Pitfalls in the Interpretation of Endocrine Tests.

Endocrine tests are the cornerstone of diagnosing multiple diseases that primary care physicians are frequently faced with. Some of these tests can be affected by situations that affect the proper interpretation, leading to incorrect diagnoses and unnecessary treatment, such as the interference of biotin with thyroid function test, falsely elevated prolactin values in presence of macroprolactinemia or falsely normal due to the "hook effect" in macroprolactinomas. Recognizing these situations is essential for the clinician to make an adequate interpretation of these tests as well as an accurate diagnosis that guarantees the best outcomes for the patient.

Pelvic Renal Ectopia: Unusual Position Abnormality.

Pelvic renal ectopia is a congenital anomaly secondary to poor renal migration to the lower back. Usually, these pathologies are of asymptomatic course, therefore its finding is usually fortuitous during radiological examinations for other causes or in work-up of the infrequent symptomatic cases characterized by the occurrence of recurrent infections or symptoms of obstructive uropathy. The objective of this report is to present a case of a 37-year-old female with the unusual manifestation of left pelvic renal ectopia. She was intervened for acute lithiasic cholecystitis, and radiologic techniques diagnosed left pelvic renal ectopia. An updated review of the literature is performed. Despite the anomaly, the patient's renal function tests were normal, so only cholecystectomy was performed without complications.

Sarcoma de Kaposi clásico en paciente fototipo VI. Primer reporte en Colombia / Classic Kaposi's sarcoma in phototype VI patient. First report in Colombia

Resumen El sarcoma de Kaposi es un tumor vascular de bajo grado, que afecta piel y mucosas, pudiendo comprometer ganglios linfáticos y órganos internos. Generalmente está asociado a infección por virus herpes humano 8, se clasifica en cuatro subtipos clínico-epidemiológicos, entre ellos el tipo clásico, que se manifiesta habitualmente en ancianos blancos, inmunocompetentes, de origen judío o mediterráneo. Se presenta el caso de un varón de 69 años, con fototipo VI, que desarrolló inicialmente máculas violáceas, eritematosas, de borde definido en región externa del pie izquierdo, que progresivamente se tornaron a placas y nódulos violáceos, acompañado de edema. Se realizó biopsia que mostró lesión vascular, cuya inmunohistoquímica presentó reactividad para CD30, CD34 y virus herpes humano 8, confirmando un sarcoma de Kaposi en fase de nódulo. Este caso resulta excepcional y se debe tener presente en el diagnóstico diferencial; los reportes en Suramérica son escasos, siendo este el primero en Colombia. MÉD.UIS. 2017;30(3):129-33.

Abstract Kaposi's sarcoma is a low-grade vascular tumor that affects the skin and mucous membranes and may compromise lymph nodes and internal organs. It is usually associated with human herpes virus infection 8, classified into four clinical-epidemiological subtypes, including the classical type, which is usually manifested in elderly, immunocompetent white Jews or of Mediterranean origin. We present the case of a 69-year-old male, with phototype VI, who initially developed violaceous macules, erythematous, with defined border in the external region of the left foot, which progressively turned to violet plaques and nodules, accompanied by edema. A biopsy was performed showing vascular lesion, whose immunohistochemistry presented reactivity for CD30, CD34 and human herpesvirus 8, confirming a Kaposi's sarcoma in the nodule phase. This case is exceptional and must be kept in mind in the differential diagnosis; the reports in South America are scarce, being the first in Colombia. MÉD.UIS. 2017;30(3):129-33.