Carcinoma de células escamosas del conducto auditivo que infiltra al hueso temporal: a propósito de un caso / Squamous cell carcinoma of the ear canal infiltrating the temporal bone: A case report

El carcinoma epidermoide del conducto auditivo es una entidad derivada del estrato espinocelular, es una neoplasia poco frecuente, con baja incidencia presentándose uno a seis casos por millón de habitantes, por lo cual existe poca información bibliográfica sobre esta patología. La clínica de presentación del cáncer de hueso temporal usualmente es inespecífica, por lo que su diagnóstico es siempre tardío. El diagnóstico definitivo requiere de biopsia de la lesión para estudio histopatológico e inmunohistoquímico y así poder establecer el comportamiento y el grado de diferenciación. Presentamos a continuación el caso de una paciente adulta con antecedente clínico de osteoporosis, diagnosticada con otitis media crónica de oído izquierdo de años de evolución, acompañada de secreción purulenta del mismo que no respondió a múltiples esquemas de tratamiento. Cursó con cefalea de predominio temporal izquierdo refractaria a analgesia convencional. En tomografía computarizada de cráneo se evidenció lesión osteolítica del hueso temporal izquierdo con invasión hacia duramadre. Tras resección y toma de biopsia de la lesión se confirma carcinoma epidermoide moderadamente diferenciado (AU)

Squamous cell carcinoma of the ear canal is an entity that arises from the stratum spinosum; it is a rare neoplasm, with a low incidence presenting 1 to 6 cases per million inhabitants, so there is little literature on this pathology. The clinical presentation of temporal bone cancer is usually nonspecific, meaning that its diagnosis is always a late-stage discovery. The definitive diagnosis requires biopsy of the lesion for histopathological and immunohistochemical study to establish the behaviour and the degree of differentiation. We present the case of an adult female patient with a clinical history of osteoporosis, diagnosed with chronic otitis media of the left ear of years of evolution, accompanied by purulent secretion of the same ear that did not respond to multiple treatment regimens. The patient also presented with a headache of left temporal predominance refractory to conventional analgesia. Cranial CT scans showed an osteolytic lesion of the left temporal bone with dural invasion. After resection and biopsy of the lesion, moderately differentiated squamous cell carcinoma was confirmed (AU)

Squamous cell carcinoma of the ear canal infiltrating the temporal bone: A case report. / Carcinoma de células escamosas del conducto auditivo que infiltra al hueso temporal: a propósito de un caso.

Squamous cell carcinoma of the ear canal is an entity that arises from the stratum spinosum; it is a rare neoplasm, with a low incidence presenting 1 to 6 cases per million inhabitants, so there is little literature on this pathology. The clinical presentation of temporal bone cancer is usually nonspecific, meaning that its diagnosis is always a late-stage discovery. The definitive diagnosis requires biopsy of the lesion for histopathological and immunohistochemical study to establish the behaviour and the degree of differentiation. We present the case of an adult female patient with a clinical history of osteoporosis, diagnosed with chronic otitis media of the left ear of years of evolution, accompanied by purulent secretion of the same ear that did not respond to multiple treatment regimens. The patient also presented with a headache of left temporal predominance refractory to conventional analgesia. Cranial CT scans showed an osteolytic lesion of the left temporal bone with dural invasion. After resection and biopsy of the lesion, moderately differentiated squamous cell carcinoma was confirmed.

Citrobacter freundii multirresistente como agente etiológico de infección de vías urinarias / Multiresistant Citrobacter freundii as an etiological agent of urinary tract infection

Citrobacter freundii, en ocasiones puede actuar como patógeno oportunista, se presenta un caso de este microorganismo aislado como agente etiológico de infección del tracto urinario, en un paciente con enfermedad pulmonar obstructiva crónica. El aislado fue multirresistente, mostrando resistencia a gentamicina, amikacina, trimetoprim sulfametoxazole, ciprofloxacino, ceftriaxona, ceftazidima, cefepime, imipenem, meropenem y doripenem y, susceptibilidad a tigeciclina y colistina, el estudio molecular demostró la presencia del gen blaKPC.

Citrobacter freundii, sometimes it can act as opportunistic pathogen, a case of this isolated microorganism is presented as an etiological agent of urinary tract infection, in a patient with chronic obstructive pulmonary disease. The isolate was multiresistant to gentamicin, amikacin, trimetoprim sulfamethoxazole, ciprofloxacin, ceftriaxone, ceftazidime, cefepime, imipenem, meropenem and doripenem and it was susceptible to tigecycline and colistin, the molecular analysis showed the presence of the blaKPC gene.