Chondro-Osseous Metaplasia in Ependymoma: A Rare Histopathological Finding

Table 1

Summary of the reported cases of chondro-osseous ependymoma in the literature.

No.	1^st Author (year)	Age/sex	Localization	Histology	WHO grade	Metaplasia	Outcome
1	Ghosal N [10], 2010	16/M	4^th ventricle	Ependymoma	II	Chondroid	Lost to follow-up
2	Coli A [11], 2014	5/M	4^th ventricle	Anaplastic	III	Chondroid	Death at 36 months
3	Boukas A [7], 2013	5/M	4^th ventricle	Anaplastic	III	Chondroid	Death at 3 months
4	Wang X [9], 2012	5/M	4^th ventricle	Ependymoma	II	Chondro-osseous	Death at 18 months
5	Jain A [8], 2009	21/M	4^th ventricle	Ependymoma	II	Chondroid	Recurrence at 5 years
6	Mridha AR [12], 2007	9/M	Lt. CP angle cistern	Anaplastic	III	Chondro-osseous	NA
7	Siqueira EB [13], 1966	10/F	4^th ventricle	Ependymoma	II	Chondroid	Death
8	Kepes JJ [14], 1984	7/F	4^th ventricle	Ependymoma	II	Chondroid	Death at 5^th day post-operation
9	Güzey FK [6], 2005	56/F	Rt. Temporo-occipital lobe	Ependymoma	II	Chondroid	No complaints at 15 months
10	Bannykh S [15], 2007	61/M	Lt. Frontal lobe	Anaplastic	III	Chondro-osseous	Death at 6 months
11	Chakraborti S [16], 2012	50/F	4^th ventricle	Myxopapillary	I	Chondroid	No recurrence at 3 years
12	Gessi M [4], 2011	1/F	4^th ventricle	Anaplastic	III	Chondroid	NA
13	Gessi M [4], 2011	2/F	4^th ventricle	Anaplastic	III	Chondro-osseous	NA
14	Gessi M [4], 2011	3/F	4^th ventricle	Ependymoma	II	Chondro-osseous	NA
15	Gessi M [4], 2011	53/F	4^th ventricle	Subependymoma/Ependymoma	I	Chondro-osseous	NA
16	Present Case, 2020	3/M	4^th ventricle	Anaplastic	III	Chondro-osseous	No recurrence at 2 years

Age is expressed in years. CP: Cerebellopontine; M: male; F: female; Rt: right; Lt: left; WHO: World Health Organization; NA: not available.