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16.03.2019 | Rhinology

Varied presentation of sinonasal phosphaturic mesenchymal tumour: report of a case series with follow-up

Zeitschrift:
European Archives of Oto-Rhino-Laryngology
Autoren:
Regi Kurien, Vedantam Rupa, Meera Thomas
Wichtige Hinweise

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Abstract

Purpose

Phosphaturic mesenchymal tumour (PMT) of the paranasal sinuses is a rare tumour that is associated with oncogenous osteomalacia causing predominant musculoskeletal symptoms. We present a series of eight patients diagnosed to have PMT of the paranasal sinuses with varied presentation and highlight the appropriate evaluation required to arrive at the diagnosis.

Methods

Retrospective review of eight patients diagnosed to have PMT-causing tumour-induced osteomalacia with follow-up data.

Results

Eight patients, 4 males and 4 females, aged 36–67 years (mean = 44 years) presented with vague musculoskeletal symptoms (6 patients) or epistaxis (3 patients). Six patients were found to have hypophosphatemia, phosphaturia and raised FGF-23 levels preoperatively. All eight patients were found to have a tumour in the nose and/ paranasal sinuses with one patient having intracranial extension. All patients were treated with endoscopic excision of these tumours which resulted in resolution of symptoms and normalisation of biochemical abnormalities. In addition, one patient required a craniofacial resection. Histopathological features were consistent with PMT mixed connective tissue variant. Two atypical patients were seen. The longest follow-up was for 5 years and there was no evidence of recurrence during the follow-up period in any patient.

Conclusion

Diagnosis of PMT of the paranasal sinuses causing oncogenous osteomalacia requires a high index of suspicion when there are no ENT symptoms. Appropriate biochemical tests and histopathology lead to the correct diagnosis. Total endoscopic surgical excision leads to a good outcome.

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