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 Table of Contents  
ORIGINAL ARTICLE
Year : 2013  |  Volume : 4  |  Issue : 4  |  Page : 448-453  

Role of dermatoglyphics as an indicator of precancerous and cancerous lesions of the oral cavity


1 Department of Oral Medicine and Radiology, Post Graduate Institute of Dental Sciences, Rohtak, Haryana, India
2 Department of Oral Medicine and Radiology, Nair Hospital Dental College, Mumbai, Maharashtra, India

Date of Web Publication17-Dec-2013

Correspondence Address:
Ambika Gupta
Department of Oral Medicine and Radiology, Post Graduate Institute of Dental Sciences, Rohtak, Haryana
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0976-237X.123039

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   Abstract 

Background: Oral squamous cell carcinoma (SCC) is one name that causes panic and holds an undeserved high ranking as a killer. Another important condition which has become a major public health issue in South East Asia is oral submucous fibrosis (OSF). Not all the people using tobacco suffer from these diseases. Genetic predisposition might explain such an individual variability that can be predicted by using various cytogenetic markers. However, these studies are far more costly and complicated. So, dermatoglyphics may be of immense clinical significance to segregate those individuals who are at an increased risk for developing these diseases. Aim: The present study was conducted to analyze the palmar dermatoglyphics in SCC and OSF and find a "dermatoglyphic marker", if any. Study Design: Cross sectional study. Materials and Methods: 120 individuals were divided into four groups based upon their habits of tobacco/areca nut usage and presence of OSF/SCC. Dermatoglyphic patterns were recorded using standard ink method. Various patterns were analysed statistically in the four groups. Results and Conclusion: In SCC, there was an increase in frequency of arch and ulnar loop patterns on fingertips, decrease in frequency of simple whorl patterns on fingertips, decrease in frequency of palmar accessory triradii on right and left hands. Significant findings in OSF included an increase in frequency of arch and ulnar loop pattern, decrease in frequency of simple whorl patterns on fingertips, decrease in atd angle on right hand, decrease in frequency of palmar accessory triradii on right hand. The results revealed that the field of dermatoglyphics holds promising results for determining the genetic susceptibility of individuals to develop SCC and OSF.

Keywords: Finger prints, genetic marker, oral squamous cell carcinoma, oral submucous fibrosis


How to cite this article:
Gupta A, Karjodkar FR. Role of dermatoglyphics as an indicator of precancerous and cancerous lesions of the oral cavity. Contemp Clin Dent 2013;4:448-53

How to cite this URL:
Gupta A, Karjodkar FR. Role of dermatoglyphics as an indicator of precancerous and cancerous lesions of the oral cavity. Contemp Clin Dent [serial online] 2013 [cited 2019 Nov 18];4:448-53. Available from: http://www.contempclindent.org/text.asp?2013/4/4/448/123039


   Introduction Top


Since the early days of civilization, the features of the hands have fascinated scholars, doctors, and laymen alike. Through decades of scientific research, the hand has come to be recognized as a powerful tool in the diagnosis of psychological, medical, and genetic conditions. Cummins in 1926 first introduced the term "dermatoglyphics" which refers to the study of the naturally occurring patterns of the surface of the hands and feet. [1] Since then, this approach has been used in various scientific studies to establish relationship of fingerprints as genetic and/or chronic health markers.

Dermatoglyphic patterns are genetically determined and remain unchanged from birth to death. Dermatoglyphics is considered as a window of congenital and intrauterine abnormalities. At present, several researches claim this study of dermatoglyphics as an important diagnostic tool for some diseases especially the diseases with obscure etiology and mysterious pathogenesis. Significant investigations have also been carried out into the dermatoglyphic indicators of Down's syndrome, Trisomy 18, D trisomy, cat cry syndrome, Turner's syndrome, Klinefelter's syndrome, congenital heart disease, leukemia, cancer, celiac disease, intestinal disorders, rubella, rheumatoid arthritis, bronchial asthma, Alzheimer's disease, schizophrenia as well as other forms of mental illness. [2],[3],[4],[5],[6],[7],[8],[9],[10],[11],[12],[13],[14],[15],[16],[17] In dentistry, dermatoglyphics have been studied to help predict disorders like cleft lip and cleft palate, dental caries, malocclusion, congenital anomalies like ectodermal dysplasia, gingival fibromatosis, periodontitis, bruxisium etc. [18],[19],[20],[21],[22],[23],[24],[25],[26],[27],[28]

So, the present study was carried out to analyze the palmar dermatoglyphics an squamous cell carcinoma (SCC) and oral submucous fibrosis (OSF) and to compare the patterns of these diseases with the control group.


   Materials and Methods Top


The present cross sectional study was carried out on the male patients who attended the outpatient Department of Oral Medicine and Radiology, Nair Hospital Dental College for Oral and Maxillofacial Examination. 120 individuals were divided into four groups. Group 1 consisted of 30 male patients with history of tobacco/areca nut intake with occurrence of oral SCC. Group 2 had 30 male patients with history of tobacco/areca nut intake with occurrence of OSF. In group 3, 30 males with habit of tobacco/areca nut, without any evidence of oral lesions were taken while the forth group had 30 males without any habit, and without any oral lesions, that served as control.

Selection criteria were male patients giving positive history of tobacco/areca nut chewing for more than 1 year, with or without use of tobacco in other forms, presence of ulcerated lesion, red and white patch or exophytic growth on oral mucosa for group 1, restricted oral opening with palpable fibrous bands and/or burning sensation of mucosa for group 2. All the cases were confirmed by histopathological examination. Exclusion criteria was the presence of oral lesions due to other causes like sharp tooth margins, improper restorations, prosthesis, alcohol or smoking, patients with scars or any injury to palms and patients with any systemic diseases.

Patients were informed in detail about the study and their informed consent was obtained to conduct the study. A structured format was designed, which consisted of demographic data, detailed history of habits, medical history, family history, clinical examination, diagnosis and histopathology report. Subjects were asked to wash their hands with soap and water to remove any dirt or oil. Palmer prints were taken by using standard ink method proposed by Strong, using black duplicating ink (Kores India Limited, Mumbai), Thick white printing paper (Berga image, A4 size, 100 g/m 2 ), roller, glass inking slab and sponge pad. [29] The finger and palmer prints were analyzed qualitatively and quantitatively using Cummins, Mildo and Penrose method. [30],[31] Various parameters studied were finger print patterns, palmar patterns, total finger ridge counts, a-b ridge counts, atd angle and accessory triradii.


   Statistical Evaluation Top


Qualitative analysis

Fingertip prints patterns

Fingertip print patterns were categorized into five types - arches, ulnar loops, radial loops, true whorls (W S ) and composite whorls. In order to find out the frequency of fingertip print patterns in both hands, all ten fingers of an individual were considered together. Frequency of each pattern was recorded in each individual and the percentage of pattern frequency was calculated for the entire group. The values of the four groups were compared and statistical differences were calculated.

Palmar patterns

Palmar patterns were observed in different areas of palms such as hypothenar (Hy), thenar/interdigital 1 (Th/I 1 ) area, interdigital 2, 3 and 4 (I 2, 3, 4 ) areas. Various patterns encountered in both hands were noted. The frequency of palmar patterns in the above mentioned areas was calculated in both hands separately and comparison was made between the study groups.

Frequency of prevalence of accessory triradii

Frequency of accessory triradii (a', b', c', d') on each palm of the subjects and controls was recorded and the percentage of prevalence for each group was calculated. The values for the four groups were evaluated using Chi-square test.

Quantitative analysis

Total finger ridge count was calculated for all ten fingers, by taking its mean. Total number of ridges between triradii "a" and "b" (a-b ridge count) were recorded in both hands. atd angles were measured in both hands. Their means were taken on both hands separately and the differences in the means were analyzed for the four study groups.

Separate tables were prepared for individual dermatoglyphic parameters observed. 'p' value was calculated and results obtained were tested for statistical significance. For qualitative data, Chi-square test was used and P value was calculated at 95% confidence levels. For quantitative data, one way analysis of variance test was used and the difference in means of each of the two groups within the four groups were analysed by applying Scheffe's test. All the above analyses were performed using statistical package SPSS 10.01 version and StatCalc (World Health Organization - Epi info 3.3.2 version).


   Results Top


The demographic data of fingerprint patterns in the study groups is described in [Table 1]. There was a significant increase in the arch and ulnar loop pattern frequency. About 33.3% of patients with SCC, 23.4% patients with OSF and 26.7% controls with habit had arch pattern in at least one finger as compared to only 13.4% controls without habits. 50% of patients with SCC and OSF had ulnar loop on more than seven fingers. This percentage was only 33.3% in controls with habit and 36.6% in controls without habit. W S were significantly decreased in SCC (n = 95) and OSF (n = 101) as compared to control groups with and without habits (χ2 = 15.890, P < 0.001). 56.6% controls without habit had this pattern on more than four fingers, while only 30% of carcinoma patients had W S on more than four fingers. There is only a slight variation in the frequency of radial loops and compound whorls in the four groups.
Table 1: Comparison of difference in prevalence of the finger print patterns in different study groups

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Analysis of total frequency of ridge count (TFRC) in our study revealed that the mean value of TFRC in OSF group was lower than the other groups studied. But, the values were not found to be significant [Table 2]a and b. The total ridge count between palmar triradii 'a' and 'b' and frequency of palmar patterns in hypothenar area, Th/I 1, 2, 3 and 4 areas were not significantly variable. Thus, no dermatoglyphic marker for palmar pattern was found in any of the study groups [Graphs 1a and b] [Additional file 1].
Table 2:

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The angle between triradii a, t/t' and d (atd angle) was measured on right and left hands separately. The mean values are summarized in [Table 3]a and b, [Table 4]a and b. The difference in the mean values of right hand of patients with OSF and control group without habit was statistically significant (P = 0.013) [Table 3]a and b, [Table 4]a and b.
Table 3:

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Table 4:

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The number of accessory palmar triradii on right and left hands of the samples in each group were observed. There was statistically significant difference in palmar triradii frequency. The differences were significant on comparison between SCC and OSF (χ2 = 5.455, P < 0.05 in right hand and χ2 = 4.02, P < 0.05 in left hand) and between SCC and control without habit (χ2 = 13.871, P < 0.01) [Table 5]a and b.
Table 5:

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   Discussion Top


SCC is a widespread disease associated with considerable amount of morbidity and mortality. It is a major worldwide health problem and the number of sufferers is increasing rapidly due to more and more people embracing deleterious habits such as tobacco chewing, smoking and alcohol abuse. Although the etiology is multifactorial, but regardless of the accelerating factors, neoplasm is thought to arise clonally from transformed cells that have undergone specific genetic and epigenetic alterations in oncogenes or tumor-suppressor genes. Many gene alterations have been implicated in the development and progression of SCC and the stages of carcinogenesis have been clearly defined. An increased risk of oral cancer is associated with a number of inherited cancer syndromes, including Li-Fraumeni, Fanconi's anaemia and xeroderma pigmentosum. Some studies have suggested that there is an inherited component to sporadic oral cancer. First-degree relatives of people with oral cancer have been reported to be at greater risk of developing the disease. Those with an inherited susceptibility may be more likely to develop multiple primary tumours. Similarly OSF is a widespread precancerous condition especially prevalent in South East Asia. Areca nut is an important predisposing factor, but not all the patients with chronic habits suffer from the disease. Conversely, not all the patients with OSF have a prolonged history of areca nut or tobacco consumption. It is said that genetic susceptibility is responsible for such variations.

The dermal ridges have various notable characteristics which make them important, not only in personal identification, but also in human biology for various reasons. Firstly, unlike many bodily traits the dermal ridges and configuration once formed remain unchanged except in dimensions, i.e. they are age stable. The ridges are environment stable and begin to appear from 5 th month of embryonic life. Although the patterns formed by ridges vary in size, shape and detailed structures, still they can be classified into definite main types. The dermatoglyphic features can thus be exploited quantitatively and qualitatively to be used as "genetic marker" of a disorder. At present, there is an agreement that dermatoglyphic features confirm to polygenic system, with individual genes contributing a small additive effect.

Various epidemiological studies support the fact that genetic alterations may be involved in the pathogenesis of SCC and OSF. These antenatal disturbances can alter the epithelium to make it susceptible to various carcinogens. The present study was carried out assuming the hypothesis that any such antenatal disturbance, if responsible for a disorder, should manifest in a prenatal event such as dermal ridge formation.

Hardly any studies are mentioned in the reviewed literature, on the use of dermatoglyphics as a marker for SCC and OSF. Veena, Humbarwadi, Potturi found a decreased atd angle, increase patterns in Th/I 1 area and increased pattern frequency in I 4 area in OSF patients as compared to normal gutkha chewers. [32] The decrease in atd angle was the only common observation in OSF group in our study. As, no other studies were found in the literature, it is difficult for us to compare our results with studies done in other populations. In various studies done on breast carcinoma, presence of six or more whorls on fingertips and decreased ridge count in cases were found to be an important "dermatoglyphic marker" for screening of population at higher risk. [33],[34],[35] In yet another study done on thyroid carcinomas, thyroid cancer subjects had a lower total digital ridge count and a reduced number of papillary ridges between the a-d triradii, than the control subjects. Qualitative examination showed more patterns in the second interdigital area. [36]

The present study on dermatoglyphic patterns of patients with SCC and OSF revealed some significant parameters which may be used as "dermatoglyphic markers". On comparing the intergroup finding the following positive parameters were observed in SCC - Increase in frequency of arch and ulnar loop patterns on fingertips, decrease in frequency of simple whorl patterns on fingertips, decrease in frequency of palmar accessory triradii on right and left hands. Significant findings in OSF included - Increase in frequency of arch and ulnar loop pattern, decrease in frequency of simple whorl patterns on fingertips, Decrease in atd angle on right hand, decrease in frequency of palmar accessory triradii on right hand.


   Conclusion Top


The field of dermatoglyphics holds promising results for determining the genetic susceptibility of individuals to develop SCC and OSF. But, further multicentric studies must be conducted in larger population with age, sex, religion and race matched controls. The studies may also be carried out to compare the findings with those of parents of the patients suffering from precancers and cancers. For carcinoma, more studies are needed to compare the findings in cancers originating in different sites and locations in the body. Also, similar studies can be carried out to compare the premalignant lesions with carcinoma. With the help of these parameters, probably the genetically predisposed individuals can be segregated amongst the population at risk and can be appropriately counselled and motivated to change the lifestyle. Also, the cost burden associated with genetic cytomarkers studies may be prevented. Thus, with the help of simple measurements, the frequency of developing dreaded diseases in later life may be prevented.

 
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    Tables

  [Table 1], [Table 2], [Table 3], [Table 4], [Table 5]


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