Saethre-Chotzen syndrome presenting with incomplete renal Fanconi syndrome.

Here we report on a patient with findings of acrocephaly, craniosynostosis, low frontal hairline, ptosis of eyelids, deviated nasal septum, broad great toes, moderate hallux valgus, bilateral symmetrical complete soft tissue syndactyly of toes 2 and 3, and partial soft tissue syndactyly of toes 4 and 5 consistent with the diagnosis of Saethre-Chotzen syndrome. Additionally, the patient had some unusual findings as part of generalized dysfunction of the renal tubules including hypophosphatemia with renal phosphate wasting, normocalcemic hypercalciuria, hypomagnesemia with renal magnesium wasting, low-molecular-weight proteinuria, decreased serum PTH levels, osteopenia, and nephrolithiasis. In the light of these findings, the diagnosis of incomplete renal Fanconi syndrome was made. In conclusion, on the basis of the present findings, it is difficult to say whether renal tubular dysfunction are somehow connected to the Saethre-Chotzen syndrome or not. Therefore, we consider that this is probably just a coincident. However, further studies may show the connection between renal tubular dysfunction and Saethre-Chotzen syndrome. Copyright 2002 S. Karger AG, Basel