24 March 2018
Int J Med Sci 2009; 6(2):77-84. doi:10.7150/ijms.6.77
Relationship between anal symptoms and anal findings
1. Praxis für Endoskopie und Proktologie, Viktoria-Luise-Platz 12, 10777 Berlin, Germany
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How to cite this article:
Kuehn HG, Gebbensleben O, Hilger Y, Rohde H. Relationship between anal symptoms and anal findings. Int J Med Sci 2009; 6(2):77-84. doi:10.7150/ijms.6.77. Available from http://www.medsci.org/v06p0077.htm
Background: The frequencies and types of anal symptoms were compared with the frequencies and types of benign anal diseases (BAD).
Methods: Patients transferred from GPs, physicians or gynaecologists for anal and/or abdominal complaints/signs were enrolled and asked to complete a questionnaire about their symptoms. Proctologic assessment was performed in the knee-chest position. Definitions of BAD were tested in a two year pilot study. Findings were entered into a PC immediately after the assessment of each individual.
Results: Eight hundred seven individuals, 539 (66.8%) with and 268 without BAD were analysed. Almost one third (31.2%) of patients with BAD had more than one BAD. Concomitant anal findings such as skin tags were more frequently seen in patients with than without BAD (<0.01). After haemorrhoids (401 patients), pruritus ani (317 patients) was the second most frequently found BAD. The distribution of stages in 317 pruritus ani patients was: mild (91), moderate (178), severe (29), and chronic (19). Anal symptoms in patients with BAD included: bleeding (58.6%), itch (53.7%), pain (33.7%), burning (32.9%), and soreness (26.6%). Anal lesions could be predicted according to patients' answers in the questionnaire: haemorrhoids by anal bleeding (p=0.032), weeping (p=0.017), and non-existence of anal pain (p=0.005); anal fissures by anal pain (p=0.001) and anal bleeding (p=0.006); pruritus ani by anal pain (p=0.001), itching (p=0.001), and soreness (p=0.006).
Conclusions: The knee-chest position may allow for the accumulation of more detailed information about BAD than the left lateral Sims' position, thus enabling physicians to make more reliable anal diagnoses and provide better differentiated therapies.
Keywords: haemorrhoids, pruritus ani, fissure-in-ano, thrombosed external haemorrhoid, benign anorectal diseases, Sims' position, knee-chest-position
Patients suffering from any symptoms related to the anus frequently and often incorrectly assume that their symptoms are due to haemorrhoids [1,2,3,4]. Lockhart-Mummery once wrote "nearly every lesion around the anus is liable to be called 'piles' by the patient and not infrequently by the referring doctor also" . This practice still prevails: "Almost everyone suffers from haemorrhoids at some time in their lives" . "Haemorrhoids and their symptoms are one of the most common afflictions in the western world" .
The exact incidence of haemorrhoids is unknown as estimates vary [1,6,8,9]. In the US about 1.5 million prescriptions for anorectal preparations are written yearly . The cost of treating benign anal diseases (BAD) in the United States exceeds 2 billion dollars annually .The German National Insurance Fund spends 38 million Euros yearly for ointments and suppositories whose use is not supported by any scientific data .
History taking does not lead to accurate anal diagnoses [1,13]. It is also unknown which examination position (i.e. left-lateral, knee-chest, lithotomy or the upright standing-bented) is the most reliable for determining the causes of anal bleeding, anal itch, anal pain or anal burning. The sensitivity, specificity and predictive value of patients' positioning in diagnosis of BAD, concomitant anal findings (CAF), and multiple anal lesions (MAL) with one individual also remain unknown [3,14,15]. We investigated the types and frequencies of anal complaints with respect to anal findings at proctologic assessment using the knee-chest position in contrast to the widely used left lateral Sims' position to evaluate its pros and cons.
Individuals were asked to complete a questionnaire that described their symptoms and signs (table 1). Proctologic assessment was performed in the knee-chest position  by inspection of the anal verge followed by digital examination of the anal canal, and anoscopy. Colono-, sigmoido- or rectoscopy were performed if necessary.
Patients' questionnaire with given answers
We used published definitions for BAD such as haemorrhoids (table 2) and pruritus ani (table 3). Concomitant anal findings (CAF) such as skin tags were defined as anal verge anatomical findings of unknown importance for BAD (table 4). Multiple anal lesions (MAL) were defined as more than one BAD found in one individual e.g. a fissure-in-ano with pruritus ani [14,15]. Definitions were tested in a two year pilot study, and adopted into routine use ten months before start of the study. Findings were entered into a personal computer immediately after proctologic assessment of each individual.
Definitions of benign anal diseases (BAD)
Figure 1 (Click on the image to enlarge.)
Chronic anterior anal fissure, diameter of 5-8mm, combined with a leftlateral thrombosed external haemorrhoid (definitions table 2).(Click on the image to enlarge.)
Posterior cavity, diameter 10x5mm, representing an old chronic anal fissure which has healed as indicated by a blanket of an epithelial layer.(Click on the image to enlarge.)
Figure 4 (Click on the image to enlarge.)
Unremarkable (normal) anal verge with hairs shaved (tiny black spots around the anus).(Click on the image to enlarge.)
Figure 6 (Click on the image to enlarge.)
Weeping anal skin with superficial round splits and longitudinal superficial lesions (stage 2 of pruritus ani, definition table 3) at everted distal anal canal. Normally the distal anal canal is closed so that these tiny, passing lesions are not seen. Lesions diameter: 1 - 3 mm.(Click on the image to enlarge.)
Reddened, weeping skin, with superficial ulcers and excoriations disrupted by pale, whitish areas with no more hairs (stage 3 of pruritus ani, definition table 3).(Click on the image to enlarge.)
Red superficial lesions situated in whitish areas of anal skin covering skin tags situated around the anus (stage 3 of pruritus ani, definition table 3).(Click on the image to enlarge.)
Pale, whitened, thickened, dry, leathery, scaly skin with no hairs and no superficial ulcers or excoriations (stage 4 of pruritus ani, definition table 3).(Click on the image to enlarge.)
Whitish, pale, dry anal skin at anal verge including thickened, leathery surrounding skin tags (stage 4 of pruritus ani, definition table 3).(Click on the image to enlarge.)
Definition of concomitant anal findings (CAF) found at inspection of anal verge during proctologic assessment
Funnel shaped anus the buttocks being permanent in touch. They leave if parted a brownish border at its extreme edges (definition table 4).(Click on the image to enlarge.)
Funnel shaped anus. A red anterior border indicates its extreme edges. Skin tags, a longitudinal split at rima ani indicates local inflammation (stage 2 of pruritus ani).(Click on the image to enlarge.)
Hairy anus. Hairs spread out almost carpet like to the anal verge (definition table 4).(Click on the image to enlarge.)
Means +/- standard deviation were computed for continuous variables such as age. Frequencies and percentages were calculated for categorical data such as the male to female ratio, history of symptoms, and anal lesions. Bivariate analyses were performed by using t-tests to compare independent groups and point-biserial correlations coefficients to analyse relationships between continuous and dichotomous variables. Bivariate relationships between pairs of dichotomous variables were analysed with Fisher's exact test. P-values of <0.05 were considered statistically significant. Binary logistic regression analysis was used to predict anal lesions based on answers of the patient questionnaire. Data were analysed using the Statistical Package for Social Sciences software (SPSS, Chicago, Il) version 15.
A total of 876 individuals of both genders aged 16 - 80 years old who consecutively entered our office from July 25, 2005 until December 20, 2005 were enrolled. They were referred by general practitioners, physicians or gynaecologists in order to determine the causes of anal and/or abdominal complaints mostly without referral letters from their primary doctor. Six individuals unable or declining to read our questionnaire were excluded. Data input was controlled by a randomised sampling of 218 patients. We found a data entry failure rate of 1,5% which was amended.
We excluded 63 individuals because of tentative diagnoses of inflammatory bowel disease (20), anal corticoid ointment harm (28), condyloma acuminate (8), anal abscess (4), anal carcinoma (1), M. Bowen (1), and HIV lesion (1), leaving 807 patients for further calculation. Of these 807 individuals, 539 patients (66.8%) were found to have BAD, while 268 (33,2%) participants did not have BAD (table 5).
Participant characteristics at study entry
* = Fisher's exact test
Of 539 patients with BAD, 168 patients (31.2%) presented with MAL (table 6). Haemorrhoids and pruritus ani followed by anal fissures were found most frequently in patients with BAD in contrast to patients with MAL, who mostly presented with anal fissures, thrombosed external haemorrhoids, and pruritus ani (table 6).
Types and frequencies of BAD in 539 patients. Comparison of types and frequencies of BAD in patients with one BAD vs. patients with MAL
Stage 2 was by far the most frequently found stage in 317 patients presenting with pruritus ani. Only stage 1 pruritus ani as a single lesion presented more frequently (table 7).
Distribution of pruritus ani stages in 317 patients with pruritus ani and comparison of pruritus ani stages in 155 patients with exclusive pruritus ani vs.162 patients with MAL
At least one CAF was observed in 408 of 807 patients (50,6%). Such CAFs were found considerably more often in individuals with than without BAD. The differences between the BAD and the no BAD group with regard to skin tags and a funnel-shaped anus were highly significant (table 8).
Types and frequencies of CAF in 807 and in patients with and without BAD
Of 807 participants, 188 (34.9%) with BAD and 105 (39.5%) without BAD did not specify symptoms. Therefore we are only able to present the answers of the remaining 350 and 161 individuals with and without BAD respectively (table 9).
To determine whether certain symptoms could serve as predictors of BAD, we used binary logistic regression analysis. The database consisted of all 17 symptoms described in the questionnaire (table 1): Haemorrhoids were predicted by anal bleeding (p=0.032), anal weeping (p=0.017), non-existence of diarrhoea (p=0.008), and anal pain (p=0.005). Thrombosed external haemorrhoids were predicted by anal lumps (p<0.001) while anal bleeding (p=0.010) was absent. Anal fissures were predicted by anal pain (p<0.001) and anal bleeding (p=0.006) in the absence of anal weeping (p=0.033). Pruritus ani was predicted by anal pain (p<0.001), anal itch (p=0.001), and anal soreness (p=0.006).
Types and frequencies of symptoms and signs specified by patients with BAD and individuals without BAD. Nominations are presented since participants stand a chance to tick more than one symptom or sign into patients' questionnaire.
For patients with MAL, we were interested whether it would be possible to differentiate among existing BADs using the symptoms described by the questionnaire. Sufficient numbers of patients were only available for haemorrhoids. We found that patients with haemorrhoids combined with pruritus ani stages 2-4 complained more often of anal itch (p<0.001), anal burning (p<0.05), anal soreness (p=0.001), and anal weeping (p=0.001) than patients with haemorrhoids only.
Individuals with and without BAD suffered from symptoms and signs for 2 to 12 months (29.3% vs. 34.4%) or more than 12 months (31,6% vs. 28,8%) before seeking help from a doctor, in contrast to those who came after "up to one week" (11.6% vs. 7.5%) or "within 2 to 4 weeks" (27.5% vs. 29.4%).
Individuals without BAD who tended to be younger (table 5), decided significantly more often to see their doctor immediately when symptoms appeared as compared to patients with BAD who tended to be older. Correspondingly, individuals without BAD treated themselves significantly less frequently (table 10).
Choices of treatment modalities for patients complaining of anal and/or abdominal symptoms and having BAD vs. individuals without BAD
* = 90 individuals did not answer this question; ** = 141 individuals did not answer this question.
The key to diagnoses of anorectal diseases remains the patient history, with confirmation by visual inspection, anoscopy, and rectoscopy [1,5,10,13,16]. So far, diagnostics often exclude more serious causes of anal bleeding such as colorectal cancer [6,7] since patients with anal complaints but without colorectal cancer are neglected. Anal bleeding, anal itch, anal pain or burning rank among the most common symptoms of anal diseases seen in primary care practices [10,13,25,26,27,28].
The utility of different examination positions for determination of the causes of anal symptoms is unknown [1,2,4,6,7,14,27]. The knee-chest position may provide a better field of view than broadly used left lateral Sims' position, as the buttocks fall to each side, and finger tips of both hands of the investigator are free for gentle eversion of the anal skin with the help of a good lighting [5,14]. A fundamental drawback might be that haemorrhoids could be found less frequently with the knee-chest position because of the sloping position of the patient: the large intestine is pulled down towards the patients' head so that the haemorrhoids are unable to protrude. The left lateral Sims' position is more comfortable and patients achieve it easily and quickly by themselves; thus the investigating physician saves time by not having to position the patient.
Anal dermatologic problems can be trivialised by physicians and surgeons and overemphasized by dermatologists. Proctologic patients often receive conflicting opinions from clinicians [3,13,14,24,26,27] since with different specialists, the labelling changes for various disorders. As noted by Alexander-Williams  "Perianal dermatitis is an umbrella term". Pruritus ani was the second most frequent BAD after haemorrhoids in our study (table 6), possibly because we used the knee-chest position with its clear view of the anal verge . Our definitions of perianal dermatitis/pruritus ani stages are based on those reported in the literature [5,17,18,19,22,23] and are descriptive only, avoiding causative suggestions [3,14,24]. The four stages illustrate transformation of the anal skin along a time course (figures 6,7,14) from acute to chronic, according to our experience [3,14,24], and those of others [10,17,18,22]. Stage 1, defined as pain during palpation of the anal canal and/or anoscopy, is a well known phenomenon not always considered relevant when the physician's finger or the anoscope touches the exquisitely sensitive squamous epithelium distal to the dentate line . It may indicate mild irritation/inflammation of anal skin (table 3).
MAL presented in almost one third (31.2%) of our patients with BAD (table 6). This is similar to other reports describing patients with three, four or five separate causes of anal itching [17,18,29]. Thus until all causes of patients complaints have been eliminated, the patients are unlikely to experience relief of symptoms [5,29]. At least one CAF was found in half (50.6%) of our patients. The meaning of this finding was unclear [5,24]. However since we found that patients with BAD have highly significant more CAF than those patients without CAF (P< 0,01), it is possible that CAF may play a role in the pathogenesis of BAD (table 8).
Published symptoms of haemorrhoids are bleeding, prolapsing tissue, mucosal or faecal soiling, fullness after defecation, itching and pain [6,7]. Haemorrhoids themselves can not be painful or itchy, since there are no sensory nerve fibres above the dentate line where haemorrhoids are derived [3,6,7,13,24]. Therefore it is understandable that our patients with MAL differed in their spectra of symptoms compared to patients with only one BAD. The spectra of symptoms in these patients suggest that they have more than one BAD to diagnose and to treat [3,12,24,29]. Interestingly our patients with BAD and without BAD did not differ much concerning their symptoms, with the exception of specific anal complaints like anal soreness (P<0.05), and anal weeping (P<0.05), both of which are suggestive of pruritus ani (table 9).
Ethics and Patient Consent
Investigations have been performed in accordance with the principles of DECLARATION OF HELSINKI. Informed consent from each patient has been obtained.
Authors disclose any financial competing interests but also any non-financial competing interests.
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Correspondence to: Prof. Dr.med. Henning Rohde, mailde, Praxis für Endoskopie und Proktologie, Viktoria-Luise-Platz 12, 10777 Berlin. ++493036440226.