Key findings:

The key findings of this study on acute appendicitis include: the retrocecal position of the appendix was most common, followed by pelvic and pre-ileal; clinical assessments had high sensitivity but lower specificity for retrocecal appendicitis; ultrasonography showed perfect sensitivity for retrocecal appendicitis but limited sensitivity for pelvic appendicitis; and a comprehensive approach combining clinical, radiological, and operative findings is essential for accurate diagnosis.

What is known and what is new?

The known aspect in this abstract is the significance of acute appendicitis as a common surgical emergency with diagnostic challenges due to anatomical variations. The new contribution is the focus on correlating clinical symptoms with the appendix's anatomical position, highlighting the limitations of individual assessments and the need for a comprehensive diagnostic approach.

What is the implication, and what should change now?

The implication of this study is that a comprehensive approach combining clinical, radiological, and operative findings is crucial for accurate diagnosis of acute appendicitis. Changes needed include refining diagnostic strategies through larger sample sizes and incorporating findings from this study to improve patient outcomes by reducing delays and complications.

Acute appendicitis (AA) remains the most prevalent cause of acute surgical emergencies in the general population, with its incidence rising in Asian countries. The principal etiologies include luminal obstruction due to lymphoid follicle hyperplasia in younger patients or fecalith impaction in older adults. Variations in the anatomical position of the appendix, however, can obscure clinical signs and symptoms, potentially delaying diagnosis and leading to significant complications such as perforation and peritonitis. These complications markedly increase morbidity and mortality rates, with fatality exceeding 20% in cases with delayed diagnosis and treatment. Therefore, timely identification and intervention are imperative to reduce associated risks. [1,2]

While the base of the appendix maintains a constant relationship with the cecum, its tip can occupy various positions within the abdominal cavity. According to Cecil Wakeley’s study, the retrocecal position is most common (74%), followed by pelvic (21%), paracecal (2%), subcecal (1.5%), pre-ileal (1%), and post-ileal (0.5%). Each position can elicit distinct clinical presentations, often mimicking other conditions. Retrocecal appendicitis can present symptoms resembling colitis or urinary tract infection, while a pelvic appendix may mimic prostatitis in males or pelvic inflammatory disease (PID) in females. Pre- and post-ileal locations can simulate ureteric colic or testicular pain due to irritation of the spermatic cord or ureters. [3,4]

Traditionally, AA diagnosis relies heavily on patient history and clinical signs, such as the typical progression from central abdominal pain to right iliac fossa discomfort. However, anatomical variability and the extent of inflammation can confound the clinical presentation, simulating other abdominal or pelvic diseases. This diagnostic complexity underscores the importance of sensitive and specific tests for accurate identification. The retrocecal position has a diagnostic sensitivity of 87.09%, while the pelvic and paracecal types have sensitivities of 76.47% and 100%, respectively. [4,5]

Imaging techniques, such as computed tomography (CT) and ultrasonography (USG), can aid diagnosis by identifying appendicitis-specific features, like a non-compressible, aperistaltic tubular structure with a dilated central lumen and oedematous walls. These tools can identify retrocecal appendicitis in 91.9% of cases and pelvic appendicitis in 90.9% of cases. However, even with advanced imaging, the exact position remains indeterminate in approximately 8.9% of patients. [3,5]

Given the variability in anatomical positions and their corresponding clinical presentations, a comprehensive understanding of the appendix's location is crucial for reducing diagnostic delays. Guidry SP et al. have shown that anatomical variations often lead to delayed diagnosis, contributing to adverse outcomes. Thus, this study aims to examine the correlation between clinical symptoms, anatomical positions of the appendix, and operative findings in patients with acute appendicitis to facilitate improved diagnostic accuracy and patient management.

• Correlation of Anatomy and Clinical Presentation: To correlate the anatomical position of the appendix with the prescriptive value of ultrasonographic findings, its varied clinical presentation, and operative findings in acute appendicitis cases.

   

• Frequency Distribution: To determine the frequency distribution of different appendix positions in patients undergoing surgery for acute appendicitis.

Study Design: This research was a prospective, observational, hospital-based study.

Location of Study: The study was conducted in the Department of General Surgery at Dr. Rajendra Prasad Government Medical College, Kangra at Tanda.

Study Duration: The research spanned one year following institutional ethical approval, from June 2020 to July 2021.

Sample Size: All patients meeting the inclusion criteria were enrolled in the study.

• All cases presenting with appendicitis.

   

• Patients consenting to surgery.

   

• Patients willing to provide informed consent.

• Patients declining participation.

   

• Cases admitted for interval appendectomy following recurrent appendicitis, appendicular abscess, or conservatively treated appendicular mass.

   

• Patients below 10 years of age.

   

• Pregnant patients.

   

• Patients unfit for surgical procedures.

• All patients underwent clinical assessment based on signs, symptoms, and laboratory criteria to identify the position of the appendix. The findings were documented on a standardized proforma.

   

• Ultrasonography was performed on all patients to rule out associated pathologies and support the diagnosis.

   

• Upon admission, a thorough history was taken, covering the primary complaints, symptom duration, severity, sequence, onset, progression, and any changes in symptom patterns at presentation, including atypical symptoms.

   

• Each patient underwent a detailed abdominal examination, including local temperature assessment, palpation for guarding/rigidity, identifying the site of maximal tenderness, checking for mass formation or rebound tenderness, and evaluating signs such as Rovsing’s, Psoas, Obturator, and Baldwin’s. A rectal examination was conducted to identify pelvic tenderness or masses.

   

• All surgeries were performed under spinal or general anesthesia. The appendix position was identified prior to manipulating other structures, and the appendix's location was carefully noted. Post-appendectomy, the specimen was sent for histopathological examination, and only histopathologically confirmed appendicitis cases were included in the study.

   

• Surgical incisions followed standard protocols, and patients received third-generation cephalosporins during hospitalization.

   

• Operative findings were assessed to determine the accuracy of clinical symptoms and radiological investigations.

• Data was recorded in a pre-designed proforma, and analysis was conducted using Microsoft Excel and Epi-Info software.

   

• Categorical variables were represented as frequencies and percentages, while quantitative variables were presented as means with standard deviations.

   

• Chi-square tests were used to assess significance for categorical variables, and ANOVA was employed for comparing means (quantitative variables). Statistical significance was set at p < 0.05.

The present study was aimed to find the correlation of clinical symptoms of acute appendicitis with anatomical position of appendix and operative findings. A total of 51 patients were included in the study over a period of 12 months in the Department of Surgery, Dr RPGMC Kangra at Tanda.

Table 1: Demographic Characteristics and Symptom Duration

Table 1 provides a demographic overview of the study participants, illustrating the age and gender distribution as well as the duration of symptoms before presentation. The majority of patients fall within the 16-25 years age group (35.3%), indicating a higher prevalence of acute appendicitis among younger adults. There is a relatively balanced gender distribution, with males slightly outnumbering females (52.9% vs. 47.1%). Regarding symptom onset, the participants were nearly equally divided between those presenting within 48 hours (52.9%) and those presenting after 48 hours (47.1%), suggesting that symptoms of appendicitis prompt medical attention within two days in just over half of the cases.

Table 2: ALVARADO Scores

Table 2 outlines the distribution of ALVARADO scores among the patients, which is a clinical scoring system used to assess the likelihood of appendicitis. The majority of patients had an ALVARADO score of 8 (49%), followed by scores of 9 and 7 (27.5% and 23.5%, respectively). This distribution underscores the utility of the ALVARADO score in predicting appendicitis in a clinical setting, with higher scores correlating with a greater probability of the condition.

Table 3: Clinical Presentations 

Table 3 details the various symptoms presented by the study participants. All patients experienced right iliac fossa (RIF) pain, with a significant majority also exhibiting RIF tenderness (94.1%). Other common symptoms included vomiting (82.3%), anorexia (58.8%), and fever (51%). The prevalence of raised total leukocyte count (TLC) in nearly half of the patients (49%) and other specific signs like Psoas sign (27.5%) provide insight into the typical clinical presentations of appendicitis, aiding in diagnostic evaluations.

Table 4: Ultrasound and Intraoperative Position of the Appendix

Table 4 compares the anatomical position of the appendix as determined by ultrasound (USG) and confirmed during surgery. A significant discrepancy is noted in the detection of retrocecal appendices (94.1% by USG vs. 78.4% intraoperatively) and pelvic appendices (5.9% by USG vs. 19.6% intraoperatively). This suggests some limitations in the accuracy of USG in identifying the pelvic position of the appendix.

Table 5: Correlation of Clinical Symptoms, USG, and Intraoperative Findings

Table 5 demonstrates the correlation between clinical presentation, USG findings, and intraoperative findings regarding the position of the appendix. The data reveal that USG tends to accurately predict the retrocecal position but underestimates the incidence of pelvic and pre-ileal positions compared to intraoperative findings. This indicates a potential area for improvement in preoperative imaging techniques to better predict varying anatomical positions.

Table 6: Diagnostic Accuracy of USG in Identifying Retrocecal and Pelvic Positions

Table 6 details the diagnostic performance of USG in identifying the position of the appendix, focusing on retrocecal and pelvic locations. USG showed excellent sensitivity (100%) for identifying retrocecal appendix but low sensitivity (27.27%) for pelvic appendices, though its specificity for the latter was perfect (100%). These metrics highlight the strengths and weaknesses of ultrasound imaging in the diagnostic process, emphasizing its reliability in confirming retrocecal appendix but indicating a need for caution in ruling out pelvic appendices based on USG alone.

Acute appendicitis, a common surgical emergency, continues to challenge clinicians due to its varied presentation and the array of conditions that mimic its symptoms. The complexities are further amplified by the different anatomical positions of the appendix, which influence the clinical presentation and complicate accurate preoperative diagnosis. This study, conducted on 51 patients presenting with right lower quadrant pain at Dr. RPGMC Kangra at Tanda from June 2020 to December 2021, aimed to elucidate the correlation between the clinical symptoms of acute appendicitis, the anatomical position of the appendix, and operative findings.

The age profile of participants primarily spanned the 2nd and 3rd decades, aligning with findings by Barman et al [6], who reported a predominant age group of under 40 years in their study. The slight male preponderance observed in this study (male to female ratio of 1.12:1) is consistent with other literature, including Singla et al [7], who noted a higher incidence in males.

Interestingly, over half of the patients (52.9%) presented within 48 hours of symptom onset, a quicker response compared to findings by Soundharya et al [8]. This prompt presentation may reflect the efficient local ambulance services that facilitate early hospital visits. The most prevalent symptoms included right lower quadrant pain, nausea, and vomiting—findings similar to those reported in studies by Gurav et al [9] and Shuaib et al [10]. The slightly lower incidence of nausea and vomiting in our study might be influenced by the rural background of most patients, possibly affecting their perception and reporting of symptoms.

Anatomical variations in the position of the appendix, as discussed in the literature, significantly affect the clinical presentation [11-14]. The developmental dynamics of the cecum and appendix, detailed by authors [15,16], explain the prevalence of the retrocecal position, which was the most common position found in this study. These developmental changes, coupled with potential fibrosis from previous inflammatory episodes, stabilize the appendix in the retrocecal location in many adults.

Our findings reveal a discrepancy between the clinically assessed positions and the positions observed intraoperatively. Clinical examination showed a high sensitivity (100%) but lower specificity (63.64%) for diagnosing retrocecal appendicitis, suggesting a propensity for over-diagnosing this condition. In contrast, the sensitivity for diagnosing a pelvic position was lower (63.64%), but specificity was complete at 100%. These results are supported by the sensitivity and specificity figures presented by Patel KG et al [4] and further underscore the limitations of clinical assessment alone in accurately determining the appendix's position.

Ultrasound, as advocated by pioneers like Puylaert et al [17], remains a crucial non-invasive tool. Despite its high sensitivity for detecting retrocecal appendicitis, its effectiveness for identifying pelvic appendicitis is notably lower, echoing the findings of Kumar S et al [5] and contrasting with those of Patel KG et al [4], who noted higher sensitivities across different appendiceal positions. This variability highlights the need for cautious interpretation of ultrasound results, particularly in atypical cases.

This study was limited by the relatively small sample size, which may reduce the generalizability of the findings. Further, the focus on a single medical facility may not fully represent regional or national trends. Future studies should include a larger and more diverse sample across multiple institutions to provide a comprehensive assessment of the diagnostic value of various methods.

The preoperative diagnosis of acute appendicitis remains challenging due to its variable presentation and overlap with other conditions. This study found that the retrocecal position was the most common, followed by the pelvic position, with pre-ileal being the least frequent. Although clinical and radiological assessments provide crucial insights, both have limitations in accuracy when used in isolation. An integrated approach combining clinical, radiological, and operative findings is essential for precise identification of appendiceal position. Further research with a larger sample size is needed to enhance the diagnostic strategies for acute appendicitis.

Funding: No funding sources.

Conflict of interest: None declared.

Ethical approval: The study was approved by the Institutional Ethics Committee of Dr. Rajendra Prasad Government Medical College.

1. Adamu, A., Megatari, M., Lawat, K., & Illyasu, M. "Waiting Time for Emergency Surgery Zaria Nigeria." Health Sciences, vol. 10, no. 1, (2010), pp. 46-53.

2. Körner, Hartwig, et al. "Incidence of acute nonperforated and perforated appendicitis: age-specific and sex-specific analysis." World journal of surgery 21 (1997): 313-317.https://link.springer.com/article/10.1007/s002689900235 

3. Memisoglu, Kemal, et al. "The value of preoperative diagnostic tests in acute appendicitis, retrospective analysis of 196 patients." World Journal of Emergency Surgery 5 (2010): 1-4.https://link.springer.com/article/10.1186/1749-7922-5-5 

4. Patel, K. G., et al. "A comparative study of different anatomical position, clinical presentation and USG findings with operative findings in patients of appendicitis." (2013). https://pesquisa.bvsalud.org/portal/resource/pt/sea-150510 

5. Kumar, Sanjeev, and Sudhir Tyagi. "Prospective Evaluation of Clinical and USG Findings of Acute Appendicitis at a Tertiary Care Teaching Hospital."

6. Barman, Malay Kumar, Koel Mukherjee, and Kaustav Das. "A comparative study of ripasa score and modified Alvardo score in the diagnosis of acute appendicitis." JMSCR 7.7 (2019): 148-53.https://www.academia.edu/download/66515961/v7i7.pdf 

7. Singla, Anand, et al. "A comparison between modified Alvarado score and RIPASA score in the diagnosis of acute appendicitis." Updates in surgery 68 (2016): 351-355. https://link.springer.com/article/10.1007/s13304-016-0381-0 

8. Soundharya, S. A comparative study of ripasa and modified alvarado scoring systems for the diagnosis of acute appendicitis. Diss. ESIC-Medical College & Postgraduate Institute of Medical Science and Research, Chennai, 2016. http://repository-tnmgrmu.ac.in/2398/ 

9. Gurav, P. D., et al. "Evaluation of right iliac fossa pain with reference to alvarado score can we prevent unnecessary appendicectomies." JKIMSU 2.2 (2013): 24-32. http://jkimsu.com/jkimsu-vol2no2/jkimsu%20vol%202%20no%202%20july%20-%20dec%202013%2024-29.pdf 

10. Shuaib, Abdullah, et al. "Evaluation of modified Alvarado scoring system and RIPASA scoring system as diagnostic tools of acute appendicitis." World journal of emergency medicine 8.4 (2017): 276. https://doi.org/10.5847%2Fwjem.j.1920-8642.2017.04.005 

11. Schumpelick, Volker, et al. "Appendix and cecum: embryology, anatomy, and surgical applications." Surgical Clinics 80.1 (2000): 295-318. https://www.surgical.theclinics.com/article/S0039-6109(05)70407-2/abstract 

12. Ghorbani, Ahmad, Mehdi Forouzesh, and Amir Mohammad Kazemifar. "Variation in anatomical position of vermiform appendix among iranian population: an old issue which has not lost its importance." Anatomy research international 2014 (2014). https://downloads.hindawi.com/archive/2014/313575.pdf 

13. Wakeley, Cecil PG. "The position of the vermiform appendix as ascertained by an analysis of 10,000 cases." Journal of anatomy 67.Pt 2 (1933): 277. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1249345/ 

14. Zern, J. T. "The appendix: little organ, big trouble." Delaware medical journal 67.6 (1995): 326-334.https://pubmed.ncbi.nlm.nih.gov/7615131/ 

15. Collins DC. Acute retrocecal appendicitis. Arch Surg.(1938);36:729–43.

16. Shah MA. Shah M. The position of vermiform appendix. Ind Med Gaz, (1945);80:494-495.

17. Puylaert, J. B. "Acute appendicitis: US evaluation using graded compression." Radiology 158.2 (1986): 355-360. https://doi.org/10.1148/radiology.158.2.2934762