[Appendiceal mucocele misdiagnosed with infected urachal cyst: a differential diagnosis to keep in mind]. / Mucocele apendicular confundido con quiste de uraco infectado: un diagnóstico diferencial a tener en cuenta.

OBJECTIVE: To report one case of appendiceal mucocele misdiagnosed with an infected urachal cyst and to review their differential diagnosis, treatment and prognosis. PATIENT: We report the case of a 74-year-old-male with abdominal pain, fever and dysuria. Hypogastric abscess image in ultrasonography and CT. Percutaneous drainage and antibiotic therapy. Opaque enema, colonoscopy and cystoscopy were normal. RESULTS: Exploratory laparotomy and resection of a large cecum-fixed mass, independent to the bladder. Appendectomy and cecectomy. Pathology showed an appendiceal mucinous cystoadenoma (mucocele). CONCLUSIONS: Appendiceal mucoceles and urachal cysts are uncommon, mostly asymptomatic. Cystoadenoma or cystoadenocarcinoma mucoceles are large and can reach the midline, confounding with urachal cysts. Diagnosis by ultrasonography and/or CT. Surgical treatment in both, keeping the mucocele intact during operation to avoid the risk of pseudomyxoma peritonei.

Mucocele apendicular confundido con quiste de uraco infectado: un diagnóstico diferencial a tener en cuenta / Appendiceal mucocele misdiagnosed with infected urachal cyst: a differential diagnosis to keep in mind

Objetivo: Presentar un caso de mucocele apendicular confundido con un quiste de uraco infectado. Revisar su diagnóstico diferencial, tratamiento y pronóstico. Paciente: Presentamos el caso de un varón de 74 años, con dolor abdominal, fiebre y disuria. Imagen compatible con absceso hipogástrico en ecografía y TC. Drenaje percutáneo y tratamiento antibiótico. Enema opaco, colonoscopia y cistoscopia normales. Resultados: Laparotomía exploradora y exéresis de gran masa adherida a ciego, independiente de vejiga. Resección segmentaria apéndice-cecal. Diagnóstico anátomo-patológico de cistoadenoma mucinoso (mucocele) apendicular. Conclusiones: Mucocele apendicular y quiste de uraco son patologías poco frecuentes, asintomáticas en la mayoría de los casos. Los mucoceles secundarios a cistoadenoma o cistoadenocarcinoma suelen ser de gran tamaño, llegando hasta la línea media, confundiéndose con quistes de uraco. Diagnóstico mediante ecografía y/o TC. Tratamiento final quirúrgico en ambos, evitando en el caso del mucocele su apertura, debido al riesgo de pseudomixoma peritoneal (AU)

Objective: To report one case of appendiceal mucocele misdiagnosed with an infected urachal cyst and to review their differential diagnosis, treatment and prognosis. Patient: We report the case of a 74 year-old-male with abdominal pain, fever and dysuria. Hypogastric abscess image in ultrasonography and CT. Percutaneous drainage and antibiotic therapy. Opaque enema, colonoscopy and cystoscopy were normal. Results: Exploratory laparotomy and resection of a large cecum-fixed mass, independent to the bladder. Appendectomy and cecectomy. Pathology showed an appendiceal mucinous cystoadenoma (mucocele). Conclusions: Appendiceal mucoceles and urachal cysts are uncommon, mostly asymptomatic. Cystoadenoma or cystoadenocarcinoma mucoceles are large and can reach the midline, confounding with urachal cysts. Diagnosis by ultrasonography and/or CT. Surgical treatment in both, keeping the mucocele intact during operation to avoid the risk of pseudomyxoma peritonei (AU)