Endolymphatic sac tumour – a rare complication associated with von Hippel-Lindau disease

Česká verzia

Authors: Mária Wozniaková ^1,2; Vladimír Židlík ^1,2; Jozef Škarda ^1,2
Authors place of work: Ústav klinické a molekulární patologie a lékařské genetiky, Oddělené klinické a molekulární patologie, Fakultní nemocnice Ostrava, Ostrava ¹; Ústav klinické a molekulární patologie a lékařské genetiky, Lékařská fakulta, Ostravská univerzita, Ostrava ²
Published in the journal: Čes.-slov. Patol., 59, 2023, No. 1, p. 32-35
Category: Original Articles

Summary

We report the case of a 42-year – old female with familiar form von Hippel-Lindau disease (VHL) and recurrent endolymphatic sac tumour (ELST), which was presented like non-homogenous, solid and cystic expansion of the left petrous temporal bone. Histologically, there was found lamellae of bone with adjacent ligament and with papillary projections with fibrovascular core. The papillae were lined by a single layer of cuboidal epithelium with hyperchromatic and lightly pleomorphic nuclei. Sporadically, small cystic formations with eosinophilic, PAS positive secretion were noted. Imunohistochemically, the cuboidal cells showed diffuse positivity for vimentin, epithelial membrane antigen (EMA), cytokeratin AE1/AE3 and S100 protein (weakly). Other markers examined, including TTF1, PAX8 and CD10, were negative. Endolymphatic sac tumour is rare low-grade malignant epithelial tumour arising from the endolymphatic sac in the temporal bone, which occurs in 1 out of 30 000 births, with just fewer than 300 cases reported in the literature. About one third of cases are associated with von Hippel- Lindau disease, an autosomal dominant familial cancer syndrome.

Keywords:

temporal bone – endolymphatic sac tumour – von Hippel-Lindau disease

Zdroje

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