{'fraction_non_alphanumeric': 0.02386117136659436, 'fraction_numerical': 0.0, 'mean_word_length': 4.775, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
[Surgery on cylindroma of the external auditory canal].

Cylindromas are rare benign tumours arising from sweat glands in the skin. They occur as multiple tumours (as in Brooke-Spieglers syndrome) and solitary tumours. They most commonly occur on the head and neck and may appear in the external auditory canal causing hearing loss. We present such a case and discuss its pathological and clinical features. The patient was treated with local surgical excision.