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Some tumour grading systems have attempted to predict the risk of local recurrence and metastatic potential in patients with phyllodes tumours (PTs). However, there has been no grading scheme that can reliably predict the behaviour of an individual patient diagnosed with PT to date. A nomogram for prediction of recurrence-free survival (RFS) in each individual with PT was introduced by Tan et al.1 We examined whether the nomogram (referred here as the Singapore nomogram) could be useful for Japanese patients. This is the first report validating the use of the Singapore nomogram in a different population. The nomogram is based on the degree of stromal atypia (mild, moderate, marked), stromal mitoses per 10 HPF (assessed in the most mitotically active areas), stromal overgrowth (absent or present) and surgical margins (negative or positive). The likelihood of 1-year, 3-year, 5-year or 10-year RFS of PT was determined by the above four variables. Calculation of RFS is automated through a computerised program at the website (http://mobile.sgh.com.sg/ptrra/).
We used the same cases documented in our previous study2 to investigate the factors involved in local recurrence and the indications for re-excision in margin positive cases. Forty-three PT patients treated between …
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