nik ruzyanei nik jaafar, norhaliza abd hamid, nur amirah hamdan, mohd afifuddin mohamad, rama krsna rajandram, raynuha mahadevan, mohd razif mohamad yunus, mohammad farris iman leong bin abdullah.  (2023).  head and neck cancer survivors' perceptions of cancer treatment and posttraumatic growth.  - malaysian journal of medicine and health sciences.  82-88. 

sasitharan p, adam mohamad, mohd razif mohamad yunus.  (2023).  boerhaave's syndrome: an unusual cause of subcutaneous emphysema.  - visual journal of emergency medicine.  1-2. 

anna fariza jumaat, mohd razif mohamad yunus, doh jeing yong, reena rahayu md zin, marina mat baki.  (2023).  multicentric castleman disease of the supraglottis: a surgeons' dilemma.  - iranian journal of otorhinolaryngology.  101-108. 

mohd sharin fakhruzzaman, ahmad kusyairi khalid, haizlene abd halim, mohd razif mohamad yunus.  (2023).  utilizing trans-oral robotic surgery (tors) in head and neck malignancy - is it practical in oropharyngeal squamous cell carcinoma (opscc)? a case report.  - bali medical journal.  930-933. 

khairil afif mahmud, fatin nurul fariha ghazali, muhammad nur islam zahari, haizlene abd halim, ahmad kusyairi khalid, song tar toh, mohd razif mohamad yunus.  (2023).  practising transoral robotic surgery in a middle-income country: surgical outcomes and early challenges.  - journal of robotic surgery.  613-618. 

rathakrishnan venkatasamy, viji ramasamy, suhana rahim, avatar singh mohan singh, mohd razif mohamad yunus.  (2023).  uncommon sites of lymphoepithelial carcinoma in head and neck region.  - cureus.  1-5. 

izry naomi lumbantobing, mohd razif mohamad yunus, arman zaharil mat saad.  (2022).  carotid bypass surgery for a persistent neck tumor after multiple treatments: a case report.  - medical journal of indonesia.  202-206. 

mohamed iliyas sultan abdul kader, asma abdullah, mohd razif mohamad yunus, mohd najib jaafar, thean yean kew.  (2022).  preoperative challenges in managing intraparotid schwannoma.  - cureus.  1-6. 

zheng zhang, nizuwan azman, hui ting eyu, nik ruzyanei nik jaafar, hajar mohd salleh sahimi, mohd razif mohamad yunus, noorsuzana mohd shariff, rohayu hami, nor shuhada mansor, ping lu, mohammad farris iman leong bin abdullah.  (2022).  validation of the malay version of the shame and stigma scale among cancer patients in malaysia.  - international journal of environmental research and public health.  1-13. 

mohamed iliyas sultan abdul kader, lee suk sian, abd razak ahmad, nurulwafa hussain, arnil george sirimanne, mohd razif mohamad yunus.  (2022).  neuropsychiatric symptoms in a p16-positive tongue carcinoma patient: an unexpected diagnosis.  - cureus.  1-4. 

lum sai guan, marina mat baki, mohd razif mohamad yunus.  (2022).  a rare case of cervical hypoglossal nerve neurofibromas in a patient with type 1 neurofibromatosis.  - brazilian journal of otorhinolaryngology.  812-816. 

nik ruzyanei nik jaafar, norhaliza abd hamid, nur amirah hamdan, rama krsna rajandram, raynuha mahadevan, mohd razif mohamad yunus, hazli zakaria, noorsuzana mohd shariff, rohayu hami, salbiah isa, nurul izzah shari, and mohammad farris iman leong bin abd.  (2022).  posttraumatic growth, positive psychology, perceived spousal support, and psychological complications in head and neck cancer: evaluating their association in a longitudinal study.  - plos one.  1-13. 

nik ruzyanei nik jaafar, nur amirah hamdan, norhaliza abd hamid, rama krsna rajandram, raynuha mahadevan, hazli zakaria, mohd razif mohamad yunus, mohammad farris iman leong bin abdullah.  (2022).  posttraumatic growth and its association with unmet supportive care needs and fear of cancer progression among head and neck cancer patients.  - plos one.  1-13. 

khairil afif mahmud, noor dina hashim, fuad ismail, mohd razif mohammad yunus, asma abdullah.  (2021).  universiti kebangsaan malaysia medical centre experience in managing temporal bone carcinoma: what can we learn?.  - medical journal of malaysia.  14. 

rohaizam japar jaafar, tham yik seng, zakinah yahaya, mohd razif mohamad yunus, marina mat baki.  (2021).  tracheostomy during the covid-19 pandemic in malaysia; a revised guideline.  - medical journal of malaysia.  23-26. 

nik ruzyanei nik jaafar, norhaliza abd hamid, nur amirah hamdan, rama krsna rajandram, raynuha mahadevan, mohd razif mohamad yunus, hazli zakaria, mohammad farris iman leong bin abdullah.  (2021).  posttraumatic growth and coping strategies among patients with head and neck cancer: do approach coping and avoidant coping predict posttraumatic growth over time?.  - frontiers in psychology.  1-10. 

noraimi khamalrudin, mohd razif mohamad yunus.  (2021).  a rare extra cardiac rhabdomyoma of the floor of mouth. what can we learn?.  - the medical journal of malaysia.  77. 

noraimi khamalrudin, mohd razif mohamad yunus, marina mat baki, foong seong kin,.  (2021).  case report of laryngeal amyloidosis: unusual cause of hoarseness.  - bali medical journal.  211-213. 

azlina ab rani, mawaddah azman, muhammad azhan ubaidah, mohd razif mohamad yunus, abdullah sani, marina mat baki.  (2021).  nonselective laryngeal reinnervation versus type 1 thyroplasty in patients with unilateral vocal fold paralysis: a single tertiary centre experience.  - journal of voice.  487-492. 

cheah pei fen, punithamalar krishnan, lawrence kong sing siong, goh liang chye, yeoh aik guan, mohd razif mohamad yunus.  (2021).  reliability of the 'm-line' in the prediction of the facial nerve position in patients with parotid neoplasms.  - medical journal of malaysia.  14. 

irfan affandi hamid, jothi shanmuganathan, khairina khairuddin, mohd razif mohamad yunus.  (2021).  parotid carcinoma: a comprehensive clinical review from a single tertiary hospital in southern malaysia.  - medical journal of malaysia.  27. 

mohamed iliyas sultan abdul kader, lee suk sian, abd razak ahmad, arnil george sirimanne, nurulwafa hussain, mohd razif mohammad yunus.  (2021).  5-fluorouracil-induced mood disorder in a patient with tongue carcinoma.  - medical journal of malaysia.  45. 

aishah harizah abdullah alwi, gendeh hardip singh, mohd razif mohamad yunus.  (2021).  a rare case of synchronous carcinoma of renal cell carcinoma and tonsillar carcinoma.  - medical journal of malaysia.  50. 

rebecca wilfred, hardip singh gendeh, sai guan lum, marina mat baki, mohd razif mohamad yunus.  (2021).  hidden parapharyngeal extracranial psammomatous meningioma: a diagnostic and surgical dilemma.  - the medical journal of malaysia.  56. 

siti sarah jasmin abdul aziz, mohd razif mohamad yunus.  (2021).  metastatic cervical lymph nodes from prostate cancer: is it possible?.  - medical journal of malaysia.  50. 

irfan affandi hamid, jothi shanmuganathan, khairina khairuddin, mohd razif mohamad yunus.  (2021).  bilateral parotid kimura disease: what we should do in this rare entity?.  - medical journal of malaysia.  52. 

arman z mat saad, mohd razif mohamad yunus, adzim poh yuen, siti muyassarah rusli.  (2021).  free flap reconstruction in hypopharyngeal tumour - the versatility of anterolateral thigh (alt) free flap in hypopharyngeal reconstruction in primary and salvage surgeries.  - medical journal of malaysia.  3. 

mawaddah azman, davina stasia teo, mohd razif mohamad yunus, kew thean yean.  (2021).  mid-upper arm circumference vs. quadriceps muscle layer thickness as a surrogate measure of fat free mass index for glim criteria assessment among head and neck cancer patients.  - international journal of gerontology.  266-271. 

mawaddah azman, siti halimahtun sahab, farah dayana zahedi, mohd razif bin mohamed yunus, nazimi abd jabar, fuad ismail.  (2021).  a 10-tear kuala lumpur review on maxillary sinus tumour.  - international medical journal.  59-63. 

ng cs, mohd razif m y, chew mx, suria hmp.  (2021).  spindle cell carcinoma of oral cavity: a rare entity.  - bangladesh journal of medical science.  923-925. 

rohaizam japar jaafar, zakinah yahaya, mohd razif mohamad yunus, marina mat baki.  (2020).  tracheostomy in upper airway obstruction on a covid-19 patient.  - bali medical journal.  806-810. 

mohammad nasyatmuddin yahya, ahmad kusyairi khalid, mohd razif mohamad yunus, arman zaharil mat saad.  (2020).  mutilating surgery with free flap in oral and oropharyngeal cancer: a report of case series.  - bali medical journal.  929-933. 

ikram hakim ,mohd razif mohamad yunus.  (2020).  extracardiac rhabdomyoma mimicking plunging ranula.  - medeniyet medical journal.  271-275. 

asma abdullah , khairul azlan shahril abu dahari , azmi mohd tamil , jaafar rohana, mohamad yunus mohd razif , ishak shareena.  (2020).  the prevalence of hearing loss among babies in the neonatal intensive care unit in a tertiary hospital in malaysia.  - medeniyet medical journal.  116-120. 

wan fariza wan jamaludin, fara rahidah husin, aini ab. aziz, mohd razif mohd yunus, mawaddah azman, kong min han, noraidah masir, mahdieh ghoddoosi, seery zaliza azura zaider, normi mustapha, nor asiah muhamad, s fadilah abdul wahid..  (2019).  the value of pet-ct scan in determining remission status in lymphoma patients involving the head & neck region.  - sains malaysiana.  2239-2248. 

s. nabil, a. j. nazimi, r. nordin, f. hariri, m. r. mohamad yunus, a. b. zulkiflee.  (2018).  mandibulotomy: an analysis of its morbidities.  - international journal of oral & maxillofacial surgery.  . 

intan kartika kamarudin, mawaddah azman, maryam entezarian, nurismah md isa, mohd razif mohammad yunus.  (2016).  oral malignant melanoma : a presentation at the alvcolar process of the maxilla.  - international medical journal.  89-91. 

nik hisyam amirul nik hishamuddin, narizan ariffin, arni talib, roslenda abdul rahman, mohd razif mohamad yunus.  (2016).  parapharyngeal space clear-cell carcinoma: report of a rare tumour at an extremely rare site.  - international medical journal.  66-69. 

azman mawaddah, mat baki marina, sawali halimuddin, mohd yunus mohd razif, sani abdullah.  (2016).  a ten-year kuala lumpur review on laser posterior cordectomy for bilateral vocal fold immobility.  - malaysian journal of medical sciences.  65-70. 

hardip singh gendeh, noor dina hashim, mohd razif mohammad yunus, balwant singh gendeh, nik ritza kosai.  (2016).  the sequelae of barium aspiration.  - anz journal of surgery.  . 

salina husain, izham mesran, syed zaifullah, balwant singh gendeh, mohd razif mohamad yunus.  (2016).  endoscopic removal of juvenile nasopharyngeal angiofibroma: conventional versus coblator-assisted.  - rawal medical journal.  90-94. 

nor haslinda mohari, roslenda abdul rahman, mohd razif mohamad yunus.  (2016).  rare incident of intraparotid lipoma.  - international medical journal.  388-390. 

natasya ayla zulkiflee, kong min-han , mohd razif mohamad yunus.  (2016).  parapharyngeal sympathetic ganglioneuroma.  - international medical journal.  438-439. 

noor liza ishak, primuharsa putra sabir athar husin, suria hayati md pauzi, isa mohd rose, mohd razif mohamad yunus.  (2016).  solitary fibrous tumour of the submandibular region: a rare entity.  - malaysian journal of medicine and health sciences.  53-55. 

primuharsa putra sha, nik hisyam amirul nik hishamuddin, mohd razif mohamad yunus, mawaddah azman, min han kong.  (2015).  complications of neck dissection in head and neck malignancy: a 12 years review in ukmmc.  - japanese journal of head and neck cancer.  291. 

tan sn, primuharsa putra sha, kong mh, mohd razif my.  (2015).  rare anatomical variant of facial nerve during parotidectomy.  - national journal of otorhinolaryngology and head & neck surgery.  24-25. 

mawaddah azman, mohd razif mohdyunus, suhaina sulaiman and syed nabil syed omar.  (2015).  enteral glutamine 0.3-0.4mg/kg/day supplementation in surgical patients with head and neck malignancy: a randomized controlled trial.  - head & neck.  1799-1807. 

tan sn, primuharsa putra sha, kong mh, mohd razif my.  (2015).  rare anatomical variant of facial nerve during parotidectomy.  - national journal of otorhinolaryngology and head & neck surgery.  24-25. 

n. ibrahim, m.n. abdul jabar, m.p. suria hayati, m.y. mohd razif, a. mawaddah, a.j. ajura.  (2015).  maxillofacial fibrosarcoma arising from dermatofibrosarcoma protuberance: a case report and review.  - journal of oral and maxillofacial surgery, medicine, and pathology.  279-282. 

shiraz qamil muhammad abdul kadar, aly alias stephen nah, mohd razif mohammad yunus, anitha vivekanandan, fadzilah ismail.  (2015).  kaposi sarcoma of the tonsils and pulmonary tuberculosis secondary to hiv infection.  - international medical journal.  558-559. 

mohammad farris iman leong abdullah,nik ruzyanei nik jaafar,hazli zakaria, rama krsna rajandram,raynuha mahadevan, mohd razif mohamad yunus, shamsul azhar shah.  (2015).  posttraumatic growth, depression and anxiety in head and neck cancer patients: examining their patterns and correlations in a prospective study.  - psycho-oncology.  894-900. 

shiraz qamil muhammad abdul kadar, aly alias stephen nah, mohd razif mohammad yunus, anitha vivekanandan.  (2015).  bilateral peritonsillar abscess with local and intracranial complications.  - international medical journal.  556-557. 

juani hayyan karaf, balwant singh gendeh, mohd razif mohamad yunus.  (2015).  infratemporal fossa extension primary parotid squamaous cell carcinoma: a rare entity with diagnosis dilemma.  - rawal medical journal.  480-482. 

j.w. teoh, razif m. yunus, faridah hassan, norazmi ghazali, zainal a.z. abidin.  (2014).  nasopharyngeal carcinoma in dermatomyositis patients: a 10-year retrospective review in hospital selayang, malaysia.  - reports of practical oncology and radiotherapy.  19(5):332-336. 

mohd nazir othman and mohd razif mohamad yunus.  (2014).  cervicofacial emphysema: a rare presentation of a nasal bone fracture.  - brunei international medical journal.  169-172. 

s husain, sz syed hamzah, bs gendeh, mr mohamad yunus.  (2014).  preoperative embolization and coblation-assisted endoscopic removal of jna.  - rhinology.  788. 

safinaz zainor, hamidah mamat, sakina mohd. saad, hisham abdul rahman, aneeza khairiyah w, hamizan mohd. razif mohamad yunus.  (2014).  parapharyngeal and retropharyngeal abscess: case review, management and outcome.  - rawal medical journal.  39(1):100-103. 

syed zaifullah, mohd razif mohamad yunus, goh bee see.  (2013).  diagnosis and treatment of branchial cleft anomalies in ukmmc: a 10-year retrospective study.  - european archives of oto-rhino-laryngology.  270(4):1501-6. 

shashi gopalan, aneeza hamizan, mohd razif mohamad yunus, priatharisiny velayutham, balachandran appoo.  (2013).  bilateral synchronous tonsillar carcinoma with bilateral neck disease.  - rawal medical journal.  38(1):79-80. 

suhana abdul rahim, lina ling chooi, avatar singh a/l mohan songh, mohd razif mohamad yunus.  (2013).  facial nerve palsy from intra-aural tick (ixodes holocyclus) infestation.  - brunei international medical journal.  9(6):382-384. 

jian woei teoh, faridah hassan, mohd razif mohamad yunus.  (2013).  laryngeal histoplasmosis: an occupational hazard.  - singapore medical journal.  54(10):e208-e210. 

rahim sba, maruthamuthu t, chooi ll, singh a, yunus mrbm.  (2013).  a white board needle in the trachea.  - bangladesh journal of medical science.  12(4):449-452. 

a najihah, my mohd razif, mr isa, mn jabar , sha primuharsa putra.  (2013).  epithelial-myoepithelial carcinoma of the hard palate.  - brunei international medical journal.  9(6):390 -393. 

mohamad hazri hamal, syafazaima abdul wahab, valuyeetham kamaru ambu, mohd razif mohamad yunus.  (2013).  incarcerated esophageal foreign body: when conventional scope fails.  - rawal medical journal.  38(2):197-199. 

suhana abdul rahman, lina ling chooi, avatar singh mohan sing, mohd razif mohamad yunus.  (2013).  an arrow foreign body involving parotid gland, maxillary sinus and tip of nose.  - rawal medical journal.  38(4):444-445. 

shashi gopalan, mohd razif mohamad yunus, suria-hayati md pauzi, noraidah masir, bee see goh.  (2013).  low grade non-intestinal sinonasal adenocarcinoma.  - brunei international medical journal.  9 (4): 274-277. 

sze shien see, kin choo pua, mohamad yunus mohd razif.  (2013).  cutaneous metastasis from carcinoma of the tongue.  - brunei international medical journal.  9(2):134-136. 

mohd nazir othman, norhaslinda abdul ghani, valuyeetham kamaru ambu, ibtisam mohamad, navarasi s raja gopal, mohd razif mohammad yunus.  (2013).  nasal tuberculosis: a case report.  - rawal medical journal.  38(1):81-83. 

mohd hazmi mohamed, khairul shaharuddin, zakinah yahya, mohd razif mohamad yunos.  (2013).  a rapidly growing lump.  - brunei international medical journal.  9(1):39+78. 

yong dj, iskandar h, razif my..  (2012).  tuberculous cervical lymphadenitis in a patient with suspected neck recurrence.  - chinese medical journal.  125(9) : 1667-1668. 

mohd razif mohamad yunus, teoh jian woei, faridah hassan, primuharsa putra sha.  (2012).  nasopharyngeal carcinoma in dermatomyositis patients : a 10-year retrospective review in hospital selayang, malaysia.  - european archives of oto-rhino-laryngology.  269(4) : 1355-6. 

f nasir, nm ibrahim, mds hasan, sha primuharsa putra, my mohd razif.  (2012).  prevalence of spinal accessory nerve dysfunction post neck dissection by electromyography (emg) and nerve conduction studies (ncs).  - european archives of oto-rhino-laryngology.  269(4) : 1367. 

nur hashima bte abdul rashid, mohd razif bin mohamad yunus, marina mat bte baki, mazita bte ami, primuharsa putra bin sabir husin athar.  (2012).  stomal recurrence after total laryngectomy: a 10-year review in universiti kebangsaan malaysia medical center.  - journal of the pakistan medical association.  62(5):466-469. 

syed zaifullah, saleh khaled aboud, mohd razif mohamad yunus, isa mohamed rose, zara nasseri.  (2012).  schwannoma of the tongue: a case report.  - rawal medical journal.  66-67. 

syed zaifullah syed hamzah and mohd razif mohamad yunos.  (2012).  mucoepidermoid carcinoma of the soft palate salivary gland.  - brunei international medical journal.  8(4):193-196. 

syed zaifullah, saleh khaled aboud, mohd razif mohamad yunus, isa mohamed rose, zara nasseri.  (2012).  schwannoma of the tongue : a case report.  - rawal medical journal.  37(1) : 66-67. 

saleh khaled aboud, mohd razif mohamad yunus, and balwant singh gendeh.  (2011).  diabetes insipidus and syndrome of inappropriate antidiuretic hormone complicating pituitary surgery.  - otolaryngology-- head and neck surgery.  144(6):1005-1006. 

noor dina hashim, mohd razif mohamad yunus, asma abdullah, marina mat baki, salina husain, mazita ami.  (2011).  primary malignant parotid lymphoma: two case reports with different disease progression and treatment.  - philippine journal of otolaryngology - head and neck surgery.  31. 

ka saleh, razif, bs gendeh.  (2011).  nasal nk/t cell lymphoma mimicking an iatrogenic lateral nasal wall infection: a diagnostic dilemma.  - medical journal of malaysia.  66(2):160-161. 

salina husain, mohammad razif muhammad yunus, roszalina ramli and primuharsa putra sabir husin athar.  (2011).  schwannoma of the tongue in a ten-year old child.  - journal of the pakistan medical association.  61(5):500-501. 

w h aneeza, m b marina, m y razif, n a azimatun, a asma, a sani.  (2011).  effects of uvulopalatopharyngoplasty: a seven year review.  - medical journal of malaysia.  66(2):129-132. 

m fadhli mohd yusoff, marina mat baki, norlen mohamed, a sani mohamed, m razif mohamad yunus, mazita ami, ilhamah othman, and azlan i ishak.  (2010).  obstructive sleep apnea among express bus drivers in malaysia: important indicators for screening.  - traffic injury prevention.  11(6):594-599. 

shaariyah mohd mokhtar, mazita ami, masaany mansor, razif mohd yunus, isa mohamed rose, asma abdullah.  (2010).  synovial sarcoma: a rare presentation of parapharyngeal mass.  - chinese journal of cancer.  29(6):631-633. 

pengiran suhaili dayangku norsuhazenah, marina mat baki, mohd razif mohamad yunus, primuharsa putra sabir hucin athar, sani abdullah.  (2010).  complications following tracheoesophageal puncture: a tertiary hospital experience.  - annals academy of medicine singapore.  39(7):565-68. 

azlan iskandar ishak, mohd razif mohd yunus, mazita ami, primuharsa putra.  (2010).  role of panendoscopy and biopsy in cervical lymph node metastasis with unknown primary: a tertiary center experience.  - rawal medical journal.  35(2):209-213. 

h salina, my mohd razif, r ramli, sha primuharsa putra.  (2010).  schwannoma of the tongue.  - 4th european congress on head and neck oncology 2010.  1-117. 

s halimuddin, my mohd razif, mb marina, a mazita, aa muhd azrif, sha primuharsa putra.  (2010).  carcinoma of larynx: a comprehensive 10 years review in selected malaysian hospital.  - european archives of oto-rhino-laryngology.  267(Suppl 1):S94. 

zainal, a., razif, m.y., makhashen, m., swaminathan, m., mazita, a..  (2010).  necrobiotic xanthogranuloma of the parotid gland.  - journal of laryngology and otology.  124(5):569-571. 

i azlan iskandar, my mohd razif, a mazita, sha primuharsa putra.  (2010).  role of panendoscopy and biopsy in occult primary of the head and neck cancer.  - european archives of oto-rhino-laryngology.  267(Suppl 1):S70. 

rifqah nordin, nazimi abdul jabar, siti salmiah mohd yunus, mohd razif mohamad yunus.  (2010).  a case report: choriocarcinoma metastasis to the maxillary.  - european archives of oto-rhino-laryngology.  267:(Suppl 1):S45. 

h salina, my mohd razif, r ramli, sha primuharsa putra.  (2010).  schwannoma of the tongue.  - european archives of oto-rhino-laryngology.  267(Suppl 1): S45. 

nazimi jabar, rifqah nordin, razif yunus, primuharsa athar, faizal ali.  (2010).  analysis of postoperative complications in primary surgery for oral cavity carcinoma: the ukm medical centre experience.  - european archives of oto-rhino-laryngology.  267(Suppl 1):S26. 

yong d j, majid m n a, mohd razif m y.  (2010).  patient with occult neck primary turns out to be tonsillar carcinoma in origin.  - rawal medical journal.  35(2):260-262. 

sha primuharsa putra, h salina, my mohd razif, m y izzuniddin.  (2010).  stomal recurrence after laryngectomy.  - european archives of oto-rhino-laryngology.  267(Suppl 1):S91. 

aneeza w h, mazita a, marina m b, razif m y.  (2010).  complete congenital third branchial fistula: does the theoretical course apply?.  - singapore medical journal.  51(7):e122-125. 

mohd mokhtar shaariyah, mat baki marina, mohd yunus mohd razif, ami mazita, sabir husin athar primuharsa putra.  (2010).  necrotizing fasciitis of the head and neck: surgical outcomes in three cases.  - malaysian journal of medical sciences.  17(2):51-55. 

h salina, my mohd razif, sha primuharsa putra.  (2010).  burkitt`s lymphoma of the tonsil.  - european archives of oto-rhino-laryngology.  267(Suppl 1):S51. 

mohd razif mohd yunus, fadzlina abdul karim, sha primuharsa putra, roslan abdul rahman, heng swee hong, ghazali mat nor, roszalina ramli.  (2006).  ludwigs angina: a retrospective study of seven cases.  - asian journal of oral and maxillofacial surgery.  18(4):263-267.