Inflammatory pseudotumor of urinary bladder - a diagnostic and management dilemma

Inflammatory Myofibroblastic Tumour of the Urinary Bladder in a Middle-Aged Man-A Case Report of an Unusual Localization of a Rare Tumour

Inflammatory myofibroblastic tumour (IMT) is a rare tumour with an intermediate biological behaviour. It usually occurs in children and adolescents, primarily in the abdomen or lungs. Histopathologically, IMT consists of spindle cells, i.e., myofibroblasts, and a variable inflammatory component. Localization in the urinary bladder is rare. We are presenting a rare case of IMT in the bladder in a middle-aged man treated by partial cystectomy. A 62-year-old man consulted a urologist because of haematuria and dysuric disturbances. A tumorous mass was detected by an ultrasound in the urinary bladder. CT urography described the tumorous mass at the dome of the urinary bladder measuring 2 × 5 cm. A smooth tumorous mass was cystoscopically observed at the dome of the urinary bladder. Transurethral resection of the bladder tumour was performed. Histopathological analysis of the specimen identified spindle cells with a mixed inflammatory infiltrate; immunohistochemical findings showed positivity for anaplastic lymphoma kinase (ALK), smooth muscle actin (SMA) and vimentin. A histopathological diagnosis of IMT was established. It was decided that the patient would undergo a partial cystectomy. A complete excision of the tumour from the dome of the urinary bladder with surrounding healthy tissue was performed. Histopathological and immunohistochemical findings of the sample confirmed the diagnosis of IMT, without the presence of the tumour at the surgical margins. The postoperative course went smoothly. IMT is a rare tumour in adults, especially localised in the urinary bladder. IMT of the urinary bladder is difficult to distinguish from urinary bladder malignancy both clinically and radiologically, as well as histopathologically. If the location and size of the tumour allow it, bladder-preserving surgeries such as partial cystectomy represent a reasonable modality of operative treatment.

Inflammatory myofibroblastic tumour: case report of a rare form of bladder tumour

Introduction and importance

Inflammatory myofibroblastic tumour (IMT) is a rare tumour with malignant potential and has been described in many major organs with the most frequent site being the lungs. However, bladder is an extremely rare location. IMT presents a unique diagnostic challenge because of the characteristics it shares with malignant neoplasms.

Case presentation

Here we report the case of a 47-yearold male who presented with storage lower urinary tract symptoms associated with non-specific lower abdominal pain for one month duration. Contrast-enhanced computed tomography of abdomen and pelvis revealed a 6 cm tumour at the dome and left side anterior wall of the bladder. He underwent laparotomy and partial cystectomy. Histopathology results were consistent with an IMT.

Clinical discussion

Even though bladder IMT is indolent in course, typical IMTs can be locally aggressive. Due to the lack of specificity in clinical symptoms, it is not easy to arrive at a precise diagnosis before surgery. Hence, the final diagnosis depends on histomorphological features and the immune histochemical profile.

Conclusion

It can be challenging to distinguish IMT from malignant neoplasms both clinically and histologically. As such, local surgical resection with close follow-up remains the mainstay of treatment for urinary tract IMT.

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Occurrence of IMT is rarely encountered in the urinary tract.

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A 47-year old male with urinary bladder tumour was histopathologically revealed to be of IMT type.

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Tumour was at the dome of the bladder and left side anterior bladder wall abutting the sigmoid colon.

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The final diagnosis depends on histomorphological features and the immune histochemical profile.

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Local surgical resection with close follow-up remains the mainstay of treatment for urinary tract IMT.

Unusual cause of urinary retention in a child: inflammatory pseudotumor of the urinary bladder

Background

Urinary bladder masses are uncommon in the pediatric age group and pose a diagnostic challenge, often necessitating histopathological differentiation and confirmation. An unusual mimic of neoplastic bladder mass is inflammatory pseudotumor, and timely identification and diagnosis of which prevents undue patient stress and radical treatment.

Case presentation

We present a case of a 7-year-old female child who presented with hematuria, and a urinary bladder mass was detected on ultrasound which was further characterized by magnetic resonance imaging (MRI) and diagnosed as an inflammatory pseudotumor (IPT) on histopathology.

Conclusions

This case report describes the imaging features of IPT along with a list of differential diagnoses emphasizing the need for radiologists to be aware of this surprising and rare entity.

Inflammatory pseudotumor of the urinary bladder

We report a case of an inflammatory pseudotumor of the urinary bladder in a 31 year-old woman. She presented at the emergency room with low abdominal pain and urinary symptoms. Abdominal ultrasound, computed tomography and magnetic resonance imaging were performed and revealed asymmetric thickening of the urinary bladder wall. Cystoscopy with urinary cytology revealed a benign nature of the process. The patient underwent partial cystectomy and the pathologic examination of the specimen revealed an inflammatory pseudotumor. We reviewed the clinical, imaging and pathological features of the inflammatory pseudotumor of the urinary bladder and discussed its differential diagnosis.

Plasma cell granuloma of the urinary bladder: A pseudotumor - A clinical dilemma

Plasma cell granuloma is a rare benign proliferative lesion that often mimics a malignant mass clinically and radiologically and its presentation in the urinary bladder is exceptional. Presuming malignant mass, such lesions often receive radical treatment. We are presenting here one such tumor, which resembled as an urachal tumor and underwent partial cystectomy.