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 ORIGINAL ARTICLE
Year : 2020  |  Volume : 57  |  Issue : 3  |  Page : 267-281

Mucinous tubular and spindle cell carcinoma of the kidney: A case series with a brief review of the literature


1 Department of Pathology, Tata Memorial Hospital, Mumbai, Maharashtra, India
2 Department of Uro-oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
3 Department of Medical Oncology, Tata Memorial Hospital, Mumbai, Maharashtra, India
4 Department of Radiology, Tata Memorial Hospital, Mumbai, Maharashtra, India

Correspondence Address:
Santosh Menon
Department of Pathology, Tata Memorial Hospital, Mumbai, Maharashtra
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijc.IJC_642_18

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Background: Mucinous tubular and spindle cell carcinoma (MTSCC) is a rare low grade renal tumour exhibiting characteristic morphological features. We share our experience and discuss briefly, a review of the current literature. Methods: Electronic medical records were searched between January 2005 to January 2017. The histopathology and immunohistochemistry slides were retrieved and reviewed. Results: Eleven cases of MTSCC were identified. Mean age at presentation was 53.9 (age range 41 to 71) years with a slight female preponderance (F: M=6:5). Clinical stage at presentation was: Stage I (4 cases), Stage II (3 cases), Stage III (1 case), and Stage IV (3 cases). The average tumour size was 7.5cm (range 3.5 to 17cm). Microscopically, characteristic biphasic tumour with tubular and spindle cell morphology with variable mucinous stroma was noted in all. The prominent immunohistochemical profile revealed positivity for CK7 (7/8, 87.5%), AMACR (6/8, 75%), AE1/3 (4/4, 100%), CD10 (3/10, 27.3%), and Vimentin (3/3, 100%). Seven patients (Stage I and II) had been treated with nephrectomy, whereas only a diagnostic biopsy was available in four patients who presented with locally advanced disease (n=1) or distant metastasis (n=3) at presentation. The mean follow-up was 37.8 months (range 8 to 96 months), available in 10 out of 11 patients, without recurrence in nine while one died 8 months after diagnosis. Conclusion: MTSCC is an indolent renal cancer with characteristic morphology. However, presentation with locally advanced disease or distant metastasis may be seen in a subset of these patients. This warrants close follow-up in even localized tumors.






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