Acute appendiceal diverticulitis is a rare cause of acute abdomen that is commonly interpreted as acute appendicitis until definitive histological result. We herein present two cases of patients of distinct age groups and gender who presented to the emergency department with right lower quadrant abdominal pain. Laboratory and imaging studies led to the diagnosis of acute appendicitis. In both cases, intraoperative findings were compatible with the initial diagnosis and therefore appendectomy was performed. Later pathological exam showed diverticulitis of the vermiform appendix. Although appendiceal diverticulitis is associated with a higher risk of perforation and neoplasms, both patients had linear postoperative period, without complications or dysplastic findings. Despite its similarities to the acute appendicitis, appendiceal diverticulitis presents itself as a distinct entity and should be suspected in patients with right lower abdominal pain in older age and with longer duration of symptoms.
Oral common blue nevus is an asymptomatic, benign, rare, pigmented lesion and sometimes clinically indistinguishable from other pigmented lesions such as the cellular blue nevus or early-stage malignant melanoma. Since it shows clinical similarities with a malignant lesion and with cellular blue nevus that can itself suffer malignant transformation, the decisive diagnosis is crucial for adequate treatment, follow-up, and prognosis. Diagnosis confirmation is given by histological analysis, the reason why most oral pigmented lesions are excised. The following case presents an asymptomatic oral pigmented lesion of the hard palate discovered during observation in an emergency setting due to an abscess of dental origin. The lesion was fully excised, and histological examination reported a “common blue nevus.” In this case, we intend to present a rare lesion of the oral cavity and the importance of performing a routine oral examination when given a chance as a preventive approach.
O tumor fibroso solitário (TFS) é um tumor benigno raro de células fusiformes de natureza mesenquimatosa que geralmente ocorre na pleura, mas pode existir noutras localizações, nomeadamente na região da cabeça e pescoço, podendo envolver a órbita, a cavidade oral e os seios perinasais. Na literatura apenas existem três casos reportados de TFS do canal auditivo externo. Descreve-se o quarto caso e realiza-se uma revisão da literatura. Uma doente de 27 anos apresentou-se com uma neoformação na parede posterior do canal auditivo externo, condicionando hipoacusia de condução de grau ligeiro e episódios de otorreia. O estudo imagiológico revelou margens regulares e ausência de invasão dos tecidos adjacentes. Foi realizada a excisão cirúrgica completa da lesão. Histologicamente era composta por células fusiformes, com áreas de hipo e hipercelularidade, tendo a análise revelado positividade para CD34, vimentina, CD99, BCL2 e STAT-6. Aos seis meses de seguimento, não apresentava sinais de recidiva.
Small-cell bladder cancer (SCBC) is a rare subtype of bladder cancer with aggressive behavior and poor prognosis. Here, we report the case of a 50-year-old man who presented with hematuria for one month. A computed tomography scan showed an exophytic lesion on the right posterolateral wall of the bladder and a single liver metastasis with a 14 mm diameter. Transurethral resection of the bladder tumor was performed, and postoperative examination of the specimen showed muscle-invasive SCBC. Initially, the patient was treated with neoadjuvant chemotherapy. Rapid clinical and imaging deterioration was observed after the premature end of cisplatin and etoposide therapy. Second-line therapy with nivolumab demonstrated systemic and local complete response. However, the patient was further diagnosed with unpredictable and unexpected urothelial muscle-invasive bladder cancer. After 76 months of regular follow-up, imaging workup did not demonstrate SCBC recurrence or urothelial bladder cancer progression. This report highlights this disease’s rarity and severity and no typical or even pathognomonic clinical and radiological presentation. Therefore, histopathology and immunohistochemistry findings play a key role in diagnosis. Immunotherapy has opened a new window in cancer treatment and maybe SCBC patients can benefit from it.
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