A Rare Case of Intravesical Angiomyofibroblastoma.

OBJECTIVE: To study the first reported case of intravesical angiomyofibroblastoma (AMFB). AMFB is an uncommon benign mesenchymal lesion, mostly described in the lower female genital tract, especially in the vulva and less commonly in the vagina. It is rarely seen in the male genital tract. The importance of this rare neoplasm is related to its potential mimicry of more infiltrative and prognostically less favorable lesions, such as aggressive angiomyxomas, that are found in the same anatomic area.

METHODS: A 26-year-old man presented to us with hematuria. Investigations revealed an intraluminal polypoidal lesion of approximately 92 × 77 × 76 mm within the urinary bladder. Cystoscopy revealed a large well-circumscribed tumor with a pedicle, attached to the inferolateral wall of the bladder near the bladder neck. Open exploration and en bloc excision of the bladder mass was done.

RESULTS: Histopathology and immunohistochemistry (IHC) confirmed the diagnosis of AMFB.

CONCLUSION: AMFB presents as a well-circumscribed superficial mass. Complete excision of the tumor for histopathologic and IHC examination is essential for diagnosis. This rare tumor shows morphologic similarity to some more aggressive tumors with less favorable outcome; hence, it needs to be differentiated from those. IHC is helpful but not always conclusive in the diagnosis of this rare neoplasm. This being the first-ever reported case of intravesical AMFB bears a significant importance. Careful clinical assessment, operative management, and histopathologic examination are of utmost importance in making a precise diagnosis and management of the patient.