Inverted Papilloma of the Lower Urinary Tract

Cameron, K. M.; Lupton, Charles H.

doi:10.1111/j.1464-410x.1976.tb06703.x

Cited by 81 publications

(36 citation statements)

References 11 publications

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“…Recently, however, several authors have expressed doubt as to the entirely benign nature of this tumor. Cameron and Lupton [8] noted that an inverted pattern was not confined to benign lesions, but was seen also in certain carcinomas, all or part of which showed this structure. Lazarevic and Garret [26] and Whitesel [41] showed papillary malignant transforma tion of the surface epithelium of inverted papillomas (type II).…”

Section: Discussionmentioning

confidence: 99%

“…Although more than 200 cases of inverted papilloma and 13 cases of inverted papillary tumor associated with malignancy have been reported to date, only 4 [6,7,10,24] and 1 [8] case, respectively, have been of recurrence. Furthermore, no invasiveness or metastasis has been documented.…”

Section: Discussionmentioning

confidence: 99%

“…We present a case of inverted papilloma of the ureter with malignant transformation. At the same time, we analyzed 10 cases of ureteral inverted papillary tu mors reported in Japan [1,2,18,22,30,32,36,42] and 13 cases of inverted papillary tumors associated with definite or probable malignancy in the entire urinary tract in the world literature [5,8,20,26,27,29,32,[37][38][39]41] to ascertain both the clinicopathological fea tures and treatment of this condition. In addition, the histogenesis of this tumor is discussed.…”

Section: Introductionmentioning

confidence: 99%

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Inverted Papilloma of the Ureter with Malignant Transformation: A Case Report and Review of the Literature

Kimura¹,

Tsuboi²,

Nakajima³

et al. 1987

Urol Int

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Inverted papilloma of the ureter is a rare tumor generally considered to be a benign lesion. We present a case of ureteral inverted papilloma with malignant transformation and review the literature. Ten cases of ureteral inverted papillary tumors in Japan and 13 cases of inverted papillary tumors associated with malignancy in the urinary tract in the world literature have been analyzed to define their features. Inverted papillary tumors of the ureter have distinct clinicopathological features, but most are discovered retrospectively after nephroureterectomy. From the standpoint of clinicopathological features, inverted papillary tumor of the ureter should be distinguished from its exophytic counterpart with respect to the treatment. If the tumor can be diagnosed macro- and microscopically during surgery as inverted papilloma or malignant inverted papillary tumor without invasion, partial ureterectomy including the lesion may be recommended. Furthermore, we propose the hypothesis that inverted papillary tumor could be a neoplasm of basal cell origin in the transitional epithelium, termed ‘basal cell urothelioma’.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Inverted Papilloma of the Ureter with Malignant Transformation: A Case Report and Review of the Literature

Kimura¹,

Tsuboi²,

Nakajima³

et al. 1987

Urol Int

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“…Of these 51 cases originally diagnosed as inverted papilloma of the uri nary tract, only 37 proved to be true inverted papillomas (see figure). Misdiagnoses, seen at all 7 pathology departments, were pTaGl-2A transitional cell carcinoma (9), p T l G 2 A trans itional cell carcinoma (2), Brunn's cell nests (2) and polyploid cystitis (1).…”

Section: Diagnosismentioning

confidence: 99%

The Prognostic Value of a Primary Inverted Papilloma of the Urinary Tract

1997

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Purpose: Ever since the recognition of the inverted papilloma as a distinct lesion of the urinary tract, there has been discussion about the possible (pre)malignant potential of this rare tumor, with subsequent uncertainty about followup. Hampering the discussion are the low frequency, the unknown etiology, the difficult histopathological diagnosis and the reported association with transitional cell carcinoma. We reviewed the literature and studied our patients, resulting in the largest series reported in the literature to date. Materials and Methods: We selected 51 patients with an inverted papilloma without a history of or a concordant transitional cell carcinoma of the urinary tract. Histology of all patients was reviewed.Results: After review, as many as 14 patients appeared to be misdiagnosed (transitional cell carcinoma in 11)* In 37 patients, we could confirm the diagnosis of inverted papilloma, with characteristics that were highly comparable to those described in the literature. Only 1 patient had a superficial bladder tumor after 49 months.Conclusions: Reviewing these data and our own results, we conclude that an inverted papil loma does not seem to be a risk factor for transitional cell carcinoma, although inverted papillomas and transitional cell carcinoma appear to be related to some extent. Therefore, frequent and long-term followup does not seem to be necessary provided that there is no doubt about the difficult histological diagnosis.

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“…Reported cases of transitional cell carcinoma of the bladder with inverted proliferation are shown in Table 1 .133, 4,6,9,1 The literature characterizes these tumors as occurring in males, usually as small lesions near a ureteral orifice, and tending to be highly agg r e s s i~e .~,~,~~ Furthermore, it is reported that a tendency toward increasing cellular anaplasia with increasing depth of invasion may give a deceptively benign histological appearance in biopsy specimens. However, in spite of having bulky tumors with unfavorable histology, our 2 female patients have been successfully treated with bladder-sparing surgery, perhaps because both tumors were pedunculated with a relatively narrow stalk.…”

Section: Disc Ussl Onmentioning

confidence: 99%

Bulky Transitional Cell Carcinoma of Bladder with Inverted Proliferation

et al. 1996

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Two women, aged 51 and 62 years, had unusual transitional cell carcinomas of the urinary bladder which were > 5 cm and had a structural resemblance to inverted papilloma or Brunn's nest. They were treated by bladder-preserving surgery with no evidence of recurrence after 30 and 103 months followup, respectively. Our cases show some hitherto unrecognized aspects of transitional cell carcinoma with inverted proliferation because the tumors are usually found in males and tend to be aggressive.Int J Urol 1996;3:316-319

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Inverted Papilloma of the Lower Urinary Tract

Cited by 81 publications

References 11 publications

Inverted Papilloma of the Ureter with Malignant Transformation: A Case Report and Review of the Literature

Inverted Papilloma of the Ureter with Malignant Transformation: A Case Report and Review of the Literature

The Prognostic Value of a Primary Inverted Papilloma of the Urinary Tract

Bulky Transitional Cell Carcinoma of Bladder with Inverted Proliferation

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