I think the below achieves what you want, though I don't have any extended properties on my tables that fit the criteria so it's hard to check if it works:
SELECT TABLE_NAME AS tTableName,
TABLE_TYPE AS tTableType,
q.epTableName,
q.epExtendedProperty
FROM information_schema.tables AS t
LEFT OUTER JOIN (SELECT OBJECT_NAME(ep.major_id) AS [epTableName],
CAST(ep.Value AS nvarchar(500)) AS [epExtendedProperty]
FROM sys.extended_properties ep
WHERE ep.name = N'MS_Description' AND ep.minor_id = 0) As q
ON t.table_name = q.epTableName
WHERE TABLE_TYPE = N'BASE TABLE'
ORDER BY TABLE_NAME