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Contemporary Oncology/Współczesna Onkologia
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Review paper

Post-glossectomy in lingual carcinomas: a scope for sign language in rehabilitation

Arvind Babu Rajendra Santosh
,
Keren Cumberbatch
,
Thaon Jones

Contemp Oncol (Pozn) 2014; 21 (2): 123–130
Online publish date: 2017/06/30
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Introduction

Oral cancers are the seventh most common cancer of the body. Among the oral cancers, squamous cell carcinoma is the most common. Squamous cell carcinoma can affect the lips, cheek mucosa, tongue, palate or teeth-bearing alveolar segment, and gums. Cancers like squamous cell carcinoma are widely treated with the surgical option of excision of the involved tissue. In instances of cancer of the tongue, the affected tongue areas are excised and this results in compromising the speech skills of these patients. Communication therapy is highly recommended for these individuals.
Speech has an oral-aural mode because it is orally produced and aurally perceived. Having lost the ability to speak, these patients often resort to note writing or pantomime to express themselves. Sign language, given its visual-gestural modality, is ideal as a means of communication for persons who cannot produce speech. Post-glossectomy patients can perceive speech auditorily and respond using signs to produce the same level of lexical and grammatical complexity found in speech.
The aim of this review is to propose sign language as a communication solution for post-glossectomy oral cancer patients. The focal point of this article is to show how patients with tongue cancers who have undergone total glossectomy as a surgical treatment can use sign language to replace their loss of speech production.

Literature review

A literature search for glossectomy procedures on tongue cancer cases was conducted in the PubMed database using the Medical Subject Heading (MeSH) term “glossectomy and tongue cancer” from the late 1980s to 2015. Four hundred and thirty-one research papers were found. The inclusion criteria were: 1) free full-text availability, 2) English language, and 3) glossectomy, tongue cancer and speech difficulty. The exclusion criteria were duplicated titles, and incorrect web-link for full text accessibility. These criteria resulted in 39 free full text papers being included (Fig. 1). The study designs, titles, abstracts, results and discussions in the 39 research papers were reviewed. Following this review, 24 research papers were excluded due to lack of information on speech difficulty. The review process yielded 15 research papers which have been considered in the present paper that satisfied the inclusion criteria (Table 1).
Luna Ortiz et al. reported that speech difficulties in tongue cancer patients are related to the size of the tumour [1]. Slurred speech is also reported in tongue cancer patients [2]. Murano et al. in 2010 reported that post-partial glossectomy with selective neck dissection resulted in numbness of the tongue, but no swallowing or speech problems [3]. Research results on brachytherapy in tongue cancer patients mentioned that brachytherapy can limit the target volume as compared to external beam radiation, thus protecting the organ involved in speech [4]. Tasker et al. in 2005 reported a case of a total glossectomy (sparing the base of the tongue) procedure on giant haemangioma of the tongue and mentioned that the post-operative progress of the patient was good and that the patient had intelligible speech when they were discharged [5].
Parikh et al. in 1998 compared hemi-glossectomy and total glossectomy procedures on tongue cancer patients and reported a direct relationship between glossectomy procedures and considerable speech difficulties. However, there was absolutely no difference in the quality of speech between both types of surgery [6]. In the published report of Halczy-Kowalik et al. in 2012 it was mentioned that reconstruction of the tongue mass after a hemi-glossectomy (i.e. where the tongue is resected lengthwise) may be beneficial for the act of swallowing but detrimental for speech generation because of the limited mobility of the remaining part of the tongue [7]. Tarsitano et al. in 2013 compared functional results of micro-vascular free radial and antero-lateral flap surgical procedures following hemi-glossectomy in metastatic tongue cancer patients and reported that no significant differences were seen for speech intelligibility or quality of life between the two surgical-flap procedures [8]. A possible explanation of these results could be that a thinner and more pliable flap, such as FRFF, may restore speech articulation more easily than ALTF. Both more extensive surgical resection (pelvectomy) and adjuvant radiotherapy are factors predictive of worse speech intelligibility recovery. Unsworth et al. in 2013 also mentioned that partial glossectomy with micro-vascular reconstruction procedure in tongue cancer patients helped with oral functions (i.e. speech and swallowing) in the early healing period [9]. Similarly, Tuhar et al. reported that total glossectomy procedures with reconstruction flap surgery performed on advanced cancer patients was a feasible method of restoring speech [10]. The use of free flaps in the immediate reconstruction of the tongue after tumour resection should aim at the maintenance of the mobility of the residual tongue and restoration of tongue bulk in order to optimise the recovery of speech and swallowing function.
Bachher et al. evaluated effective rehabilitation approaches following partial glossectomy procedures and reported that voice quality and resonance are compromised because of a change in oral cavity volume. Articulation is affected because the tongue is unable to assume the normal position to provide valuing action needed for precise articulation. Further to this, the larger the segment of the tongue resected, the greater is the distortion of speech [11]. Sargis et al. stated that speech is believed to be determined by variables such as the extent and site of the resection in the glossectomy procedure. In other words, slight differences in tumour size dissection do not create significant differences in ability to produce speech gestures [12]. However, glossectomy patients have limited motion on the tumour-resected side and they compensate for this with greater motion on the non-tumour side in order to elevate the tongue tip [13, 14]. Kies et al. mentioned that glossectomy patients underwent a standardised speech and swallowing evaluation before induction chemotherapy and after induction chemotherapy prior to surgical resection of the tongue, and the results were associated with excellent prognosis [15].

Post-glossectomy oral cancer and speech difficulties

Glossectomy is the surgical removal of the tongue, and it is categorised into two types, namely partial and total. Partial glossectomy is the surgical removal of the anterior two-thirds of tongue. In total glossectomy the entire tongue is surgically removed. Glossectomy is the primary treatment option for oral cancer patients with tongue involvement [41].
The tongue is central to the production of vowels and consonants, and the tongue volume helps to maintain resonance. The tongue and lips modulate the production of vowels or consonants due to the capacity of the oral cavity to modify its size and shape. The final speech utterance is produced through a partially or totally occluded oral cavity [42]. Any abnormality in the oral cavity will result in speech dysfunction. Total or partial removal of the tongue will result in speech articulation difficulties as well as changes in resonance [11]. Speech dysfunction may also be identified in post-surgical oral cancer cases of the tongue, floor of mouth, and soft/hard palate. Disruption of the tongue or other oral structures that are involved in speech production and articulation by a tumour or surgical intervention will affect speech intelligibility and affect patient’s quality of life [8].
Speech dysfunction following glossectomy is dependent on factors such as extent of surgical resection, tumour stage, tumour site, and extent of severity of damage to tongue muscles during surgical procedure. Additional post-glossectomy complaints may include slurring of speech, gradual loss of speech, stigma or speech impediment [43].
Treatment modalities involved in post-glossectomy treatment are speech therapy, mouth and tongue stretching exercises, muscle compensation/strengthening exercises, and tongue reconstruction [44]. Post-glossectomy mouth and tongue stretching exercises, and muscle compensation exercises aid the patient by strengthening the tongue’s muscles towards regaining some of the movement lost due to the glossectomy [45]. The use of maxillary prostheses aids this process as they replace hard structures like the palate and thus give the tongue a firm surface against which to produce sounds [16].
Larger surgical defect areas are usually reconstructed with flap/graft to restore normal function [46]. The effect on the intelligibility and quality of speech was more pronounced in these surgically reconstructed cases due to the reduced extensibility of the grafted tissue which may lead to decreased tongue mobility. However, additional surgical reconstruction can reverse this to a large extent.
Pre- and post-glossectomy visits to the speech pathologist are mandatory in all modalities as the Post-Glossectomy Patient (PGP) has to be re-taught the basic rudiments of speech, and once taught, they have to practice repeatedly to try and re-develop proper speech patterns. For some patients, speech therapy started 4 months after radiation treatment, and one reported that they “hit a plateau in [their] progression”. Sign language as a treatment option would decrease the plateau effect by giving them another method of communication and decreasing their total reliance on speech. Speech therapists, who are not themselves fluent in sign language, can work alongside a sign linguist or a sign language teacher to include the use of sign language in therapy. This would facilitate sign language acquisition by the patient.
Despite participating in speech therapy, patients still suffer from psychological conditions caused by their loss of speech, and many report that they are more self-conscious about their post-glossectomy appearance, especially where it has altered their facial appearance. One such patient reported being very self-conscious, and that knowing “people were staring at them in public” made them even more nervous. The sum effect is that these patients have lower self-esteem due to the resulting speech impediments.
In all modalities, use of a sign language is being recommended as an additional post-treatment solution for post-glossectomy patients as it will give these patients a language that they can use daily without fatigue, decrease their sole dependency on using their tongue to communicate, and it may increase their self-confidence and self-esteem. Self-confidence may increase as they do not have to communicate solely with their tongue, thus decreasing the focus on their speech difficulty by others, and thus they would be less self-conscious of their speech challenges, especially during their speech therapy phase. If at the end of the speech therapy phase they still have difficulty speaking, they can rely more on signing for communication. There can be a greater chance of fluency if sign language lessons are started once the decision to undergo the glossectomy treatment is taken. The post-glossectomy patient would be able to learn the rudiments of the language before the surgery is performed and thus be able to communicate immediately after the surgery without having to revert to written communication.

Sign language as a rehabilitation tool

A glossectomy changes the linguistic identity of a patient from oral and hearing to dysarthric and hearing for partial glossectomy patients, or mute and hearing for total glossectomy patients. This shift requires holistic pre-glossectomy preparation and support. The partial glossectomy patient would require speech therapy and may adopt a sign language as a supplemental or secondary means of communication. For the total glossectomy patient, the surgeon, psychologist and social worker should assist the patient in planning for life as a mute. This plan must include sign language acquisition which ideally would begin as soon as glossectomy is added to the treatment plan. The patient should then have sign language classes and become a member of the local Deaf community. This approach challenges the health care team to transition from a medical/pathological view of deafness to a cultural/anthropological view. This latter view acknowledges the existence of a culture with an identity of having a visual-gestural language as its primary means of communication [47].
It may be challenging to acquire a language, particularly one in a different modality, as an adult or at the stage of life in which the patient finds himself [48]. The best teacher of a language is a native user of that language. Thus, the starting point for sign language classes should be local deaf organisations. If none are available, the patient can check schools for the deaf and religious organisations for sign language classes. Some universities offer sign language courses and programmes. If one is uninterested in an entire university programme, one may be able to audit a course or be specially admitted for a specific course.
Members of the family or primary home support network should also learn sign language, preferably at the same time as the patient. Together, the patient and his family or support network must create a post-glossectomy communication plan. This plan would outline or detail the settings and communicative events in which speech and sign language would be used. Creating this plan would assist everyone involved in making a mental shift toward the impending speech disorder [17].

Conclusions

Post-glossectomy oral cancer patients who incorporate learning sign language in their rehabilitation are able to compensate for their speech loss, communicate more easily, improve their self-esteem, and have a higher quality of life. Oral cancer patients who undergo glossectomies require speech rehabilitation procedures to maintain interpersonal communication because of the role of speech in social interaction. Any impairment in speech may lead to marginalisation due to social stigmas.
Sign language acts as an adjunct method of communication rehabilitation in post-glossectomy patients. In the post-operative period, compromised tongue tissue causes a reduction in the ability of patients to manipulate the tongue for well-formed phonetic articulation. The speech therapist and sign linguist can work together to create both a sign language learning plan for the patient and a communication plan that incorporates their understanding of speech with their use of sign language.
Communicating is critical to survival and a high quality of life. Whilst post-treatment speech rehabilitation may not lead to functional or complete restoration of speech, sign language as a communication method can be a tool to optimise the patient’s quality of life. The incorporation of sign language use in the management of the glossectomy patient would be a novel and important step in the new drive towards comprehensive management of surgical patients.

The authors declare no conflict of interest.

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Address for correspondence

Arvind Babu Rajendra Santosh
Oral and Maxillofacial Pathologist,
Lecturer and Research Coordinator – Dentistry Programme
Faculty of Medical Sciences
The University of the West Indies Mona Campus,
Kingston 7 Jamaica, West Indies
e-mail: arvindbabu2001@gmail.com

Submitted: 15.12.2016
Accepted: 24.01.2017
Copyright: © 2017 Termedia Sp. z o. o. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License (http://creativecommons.org/licenses/by-nc-sa/4.0/), allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.
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