Mycosis fungoides is the most common type of primary cutaneous T cell lymphoma. We have evaluated CDKN2A losses and MYC gains/amplifications by FISH analysis, as well as expression of miR-155 and members of the oncogenic cluster miR-17-92 (miR17, miR18a, miR19b, and miR92a) in MF patients with advanced disease. Formalin-fixed paraffin-embedded skin biopsies from 36 patients at diagnosis, 16 with tumoral MF (T-MF), 13 in histological transformation to a large T cell lymphoma (TR-MF), and 7 cases with folliculotropic variant (F-MF), were studied. Twenty cases showed genomic alterations (GAs): 8 (40 %) had CDKN2A deletion, 7 (35 %) showed MYC gain, and 5 (25 %) exhibited both alterations. GAs were more frequently observed in F-MF (p = 0.004) and TR-MF (p = 0.0001) than T-MF. GAs were significantly higher in cases presenting lesions in head, neck, and lower extremities compared to those observed in trunk and upper extremities (p = 0.03), when ≥25 % neoplastic cells were CD30 positive (p = 0.016) as well as in cases with higher Ki-67 proliferation index (p = 0.003). Patients with GAs showed bad response to treatment (p = 0.02) and short survival (p = 0.04). Furthermore, MF patients showed higher miRNA expression compared to controls (p ≤ 0.0223). T-MF showed higher miR17 and miR-18a expression compared to F-MF and TR-MF (p ≤ 0.0387) while miR19b, miR92a, and miR-155 showed increased levels in F-MF and TR-MF with respect to T-MF (p ≤ 0.0360). Increased expression of miR17 and miR19b in GA group compared to cases without alterations (p ≥ 0.0307) was also detected. Our results add new information about genomic imbalances in MF patients, particularly in F-MF, and extend the present view of miRNA deregulation in this disease.
La criptococosis es una infección micótica de distribución mundial que suele presentarse en pacientes inmunodeprimidos, especialmente por el virus de la inmunodeficiencia humana (VIH). Afecta con mayor frecuencia el pulmón y el sistema nervioso central, con manifestaciones cutáneas infrecuentes. El diagnóstico se realiza por la observación directa del hongo, los estudios histopatológicos, el aislamiento en cultivos y la presencia del antígeno capsular en la sangre o el líquido cefalorraquídeo. La terapéutica dependerá de la forma de presentación de la infección y el grado de compromiso inmunitario en el momento del contacto con el hongo. Se analiza el caso de una paciente con antecedentes de hepatitis autoinmune que presentó una criptococosis cutánea por diseminación hematógena, con buena respuesta a la terapéutica instaurada.
Hombre de 60 años, con antecedentes de hipertensión, enfermedad pulmonar obstructiva crónica e hipercolesterolemia en tratamiento con hidroclorotiazida, budesonida-formoterol en aerosol y rosuvastatina, consultó por una lesión asintomática en la pierna izquierda, de un año de evolución. En el examen físico se observó una lesión tumoral cupuliforme eritematosa, con un centro hiperqueratósico, redondeada, de 4 mm de diámetro, localizada en la región patelar interna izquierda. Se realizó la extirpación total de la lesión.
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