Rachel’s case study

QUESTION

Rachel is a 28 year old woman who presents to your clinic with a chief complaint of constipation and abdominal pain. Upon further questioning, she reports she has had this problem since beginning college at the age of 18 years. She reports that her symptoms come and go. She describes the pain as dull and crampy and states that the pain is throughout the entire abdomen but is more prominent in the left lower quadrant. She states the pain is occasionally relieved with defecation.

Rachel denies radiation of the pain, nausea, vomiting, fever, chills, weight loss, heartburn, or bloody or dark stool. She reports having a bowel movement every 1 to 2 days that is hard and feels incomplete. She has tried over-the-counter remedies, including stool softeners and antacids, but only experienced minimal improvement in her symptoms. She denies the use of laxatives. Rachel denies any family history of colorectal cancer and inflammatory bowel disease. Rachel endorses that she is currently engaged and under significant stress in preparing for the wedding.

Past Medical History:  No past medical history

Medication History:  Lo Loestrin Fe 1 tablet by mouth every day  for contraception

Drug Allergy: Penicillin (rash)

Family Medical History:  Father: healthy; Mom: healthy; no siblings; Maternal grandparents: alive, healthy; Paternal grandparents: alive, healthy.

Surgical History: Denies any surgeries or hospitalizations

Social History:  Denies cigarette use. Reports she drinks alcohol – about 1 drink once a month. Denies illicit drug use. Occupation:  Teacher. She is currently engaged and lives in an apartment with her fiancé.

Vaccination: Up to date

Physical Exam: 

V/S: BP: 112/62, HR: 74, T: 98.1(oral), RR: 14, Wt.: 125lbs, Ht.: 64 inches, BMI: 21.5

Gen: Anxious-appearing, otherwise in no acute distress

CV: Normal S1& S2, rhythm regular

Resp: Regular rate and pattern. No adventitious breath sounds auscultated

Abd: Soft, non-distended, non-tender, bowel sounds + and normal x 4 quadrants, no masses palpated.  Liver and spleen size are normal and no masses are palpable.

Neuro/Psych: alert and oriented X 3. Good eye contact, speech clear. Anxious

Rectal examination: normal sphincter tone, no masses noted

Diagnostic Tests:  In-house: fecal occult blood test

Case Questions:

What is/are the diagnoses? Support with literature evidence and interpretation of data presented in the case study.

Discuss the pathophysiology of the selected diagnosis.

Present and briefly discuss(rationale) 3 differential diagnoses for this patient.

Discuss plan of care for this patient-pharmacological, education, referral, and need for further diagnostic testing if any. What are your thoughts about his asthma?

Support your plan of care/interventions with literature evidence.

ANSWER

Based on the provided case study, the most likely diagnosis for Rachel’s symptoms is irritable bowel syndrome with constipation (IBS-C). IBS is a common functional gastrointestinal disorder characterized by recurrent abdominal pain or discomfort associated with alterations in bowel habits. According to the Rome IV criteria, which are widely used for diagnosing functional gastrointestinal disorders, IBS-C is defined as the presence of abdominal pain or discomfort associated with constipation symptoms for at least three days per month over the past three months, with symptom onset at least six months prior.

The evidence supporting the diagnosis of IBS-C in this case includes Rachel’s chronic history of constipation and abdominal pain, which began during her college years and has persisted for ten years. Her symptoms come and go, and the pain is described as dull, crampy, and mainly localized in the left lower quadrant. Additionally, Rachel experiences partial relief with defecation, which is a common feature of IBS.

The pathophysiology of IBS-C is multifactorial and not completely understood. It is believed to involve various mechanisms, including altered gut motility, visceral hypersensitivity, changes in the gut microbiota, and disturbances in the brain-gut axis. These factors can lead to dysregulation of the normal coordination between the brain and the gut, resulting in symptoms such as abdominal pain, bloating, and changes in bowel habits.

Three differential diagnoses to consider for Rachel’s symptoms include

Chronic constipation: Although Rachel’s symptoms are consistent with constipation, the chronicity and recurring nature of her symptoms, as well as the partial relief with defecation, suggest a functional disorder like IBS rather than a simple mechanical obstruction or dietary-related issue.

Inflammatory bowel disease (IBD): While Rachel denies a family history of IBD and her symptoms are not suggestive of an acute inflammatory process (no fever, weight loss, or bloody stool), it is important to consider IBD as a possible differential. Further evaluation, such as stool tests, inflammatory markers, and colonoscopy, may be warranted if initial management for IBS-C is not effective.

Endometriosis: Although not mentioned in the case, endometriosis can present with symptoms similar to IBS, including chronic abdominal pain and bowel symptoms. Given Rachel’s age and gender, it is worth considering endometriosis as a differential diagnosis. A thorough gynecological evaluation should be considered if her symptoms persist or worsen.

The plan of care for Rachel would involve both pharmacological and non-pharmacological interventions, patient education, and possible referral for further evaluation. The initial approach for managing IBS-C focuses on lifestyle modifications and dietary changes. Increasing fiber intake, maintaining adequate hydration, and regular exercise can help alleviate symptoms. Avoiding trigger foods or irritants and practicing stress management techniques may also be beneficial.

Regarding pharmacological management, the first-line treatment options for IBS-C include fiber supplements (such as psyllium), osmotic laxatives (such as polyethylene glycol), and selective serotonin reuptake inhibitors (SSRIs) like escitalopram or fluoxetine, which can help modulate pain perception and bowel function. It is important to involve Rachel in the decision-making process and tailor the treatment plan to her specific needs and preferences.

Patient education plays a vital role in managing IBS-C. Rachel should be provided with information about the nature of IBS, reassurance that it is a benign condition, and guidance on self-management strategies. Stress reduction techniques, such as cognitive-behavioral therapy or mindfulness-based stress reduction, may also be beneficial.

If Rachel’s symptoms do not adequately respond to initial management or if there are atypical features or concerning findings during the physical examination, further diagnostic testing may be considered. This

may include additional laboratory tests (such as celiac serology), imaging studies (such as abdominal ultrasound or computed tomography), or referral to a gastroenterologist for further evaluation, including endoscopy or colonoscopy, to rule out other gastrointestinal conditions.

The plan of care outlined above is supported by current evidence-based guidelines for managing IBS. However, it is important to individualize the treatment approach based on the patient’s specific needs and preferences. Regular follow-up and reassessment of symptoms will be necessary to monitor treatment response and make appropriate adjustments as needed.