Bezoar (Trichobezoar - Hair)

1. Executive Overview: Understanding Trichobezoars

A bezoar is a solid mass of indigestible material that accumulates in the gastrointestinal (GI) tract, typically within the stomach. When this mass consists primarily of swallowed hair, it is clinically termed a Trichobezoar.

While bezoars can be categorized into various types—phytobezoars (vegetable fibers), pharmacobezoars (medication), and lactobezoars (milk proteins)—the trichobezoar is particularly notable for its association with psychiatric conditions and its potential for severe mechanical obstruction. Trichobezoars are often associated with Rapunzel Syndrome, a rare but critical manifestation where the hairball extends from the stomach into the small intestine (duodenum, jejunum, or ileum).

This guide serves as a comprehensive clinical reference for patients and caregivers to understand the pathophysiology, diagnostic pathways, and therapeutic protocols for this gastrointestinal anomaly.

2. Pathophysiology, Etiology, and Risk Factors

The Pathophysiology of Hair Accumulation

The human stomach is designed to process food, but it cannot digest keratin, the protein that makes up human hair. When a patient compulsively ingests hair, the strands become trapped in the gastric mucosal folds. Due to the smooth surface of hair, it does not pass easily through the pylorus. Over time, mucus and food particles become entangled with the hair, creating a dense, malodorous, and often rock-hard mass that takes the shape of the stomach.

Etiology and Psychological Foundations

The primary driver for trichobezoar formation is Trichotillomania (compulsive hair-pulling) combined with Trichophagia (compulsive hair-eating). These are classified under obsessive-compulsive and related disorders.
* Psychological Triggers: Often rooted in childhood trauma, emotional distress, or underlying anxiety disorders.
* Biological Resistance: Because hair is chemically inert and resistant to gastric acid, the mass continues to grow as long as the behavior persists.

Risk Factors

3. Signs, Symptoms, and Clinical Presentation

Trichobezoars often remain asymptomatic for long periods until the mass reaches a critical size that causes gastric outlet obstruction or ulceration.

Common Clinical Manifestations

• Epigastric Pain: A dull, persistent ache in the upper abdomen.
• Early Satiety: Feeling full after consuming only a small amount of food.
• Nausea and Vomiting: Often postprandial, resulting from partial or complete gastric outlet obstruction.
• Weight Loss: Secondary to chronic malnutrition and inability to retain caloric intake.
• Halitosis: Caused by the fermentation of food trapped within the hair mass.
• Abdominal Mass: A palpable, firm, mobile mass in the epigastric region.
• Alopecia: Patchy hair loss on the scalp (or eyebrows/eyelashes) where the patient has been pulling hair.

Complications

If left untreated, the trichobezoar can cause severe complications, including gastric ulceration, perforation, gastrointestinal bleeding, intussusception, and peritonitis.

4. Standard Diagnostic Evaluation & Workup

The diagnosis of a trichobezoar requires a multimodal approach combining physical examination, imaging, and endoscopic visualization.

Diagnostic Modalities

1. Physical Examination: Careful palpation of the abdomen may reveal a hard, non-tender or tender epigastric mass.
2. Upper GI Endoscopy (Gold Standard): This is the definitive diagnostic tool. It allows for the direct visualization of the hair mass, assessment of the gastric mucosa for ulcers, and, in some cases, provides a route for biopsy or fragmentation.
3. Abdominal Computed Tomography (CT): A CT scan with oral and intravenous contrast is the gold standard imaging study. It reveals a well-defined, mottled gas-filled mass within the gastric lumen. It also helps rule out Rapunzel Syndrome by assessing the extension into the small bowel.
4. Abdominal Ultrasound: While less specific than CT, it can identify a hyperechoic arc with acoustic shadowing, which is characteristic of a bezoar.

Laboratory Assays

While no specific blood test confirms a bezoar, labs are essential for assessing the patient’s systemic state:
* Complete Blood Count (CBC): To check for anemia (common in chronic cases).
* Electrolyte Panel: To evaluate metabolic imbalances caused by chronic vomiting.
* Albumin/Prealbumin: To assess the patient's nutritional status.

5. Therapeutic Interventions

Treatment is determined by the size, location, and presence of complications.

Endoscopic Management

For smaller bezoars, endoscopic removal is the first-line treatment. This involves using snares, baskets, or lithotripsy (breaking the mass into smaller pieces) to remove the hair via the esophagus. However, large, hardened bezoars often fail endoscopic extraction.

Surgical Intervention (Laparotomy/Laparoscopy)

In cases of large bezoars or those causing intestinal obstruction (Rapunzel Syndrome), surgical intervention is mandatory.
* Gastrotomy: A surgical incision into the stomach to remove the mass in its entirety.
* Laparoscopic Approach: Increasingly preferred for its minimal invasiveness and faster recovery, provided the surgical team has the expertise.

Long-Term Prognosis & Psychiatric Care

The physical removal of the bezoar is only half the cure. Because the underlying etiology is often behavioral, the risk of recurrence is high.
* Psychiatric Referral: Mandatory cognitive-behavioral therapy (CBT) and, in some cases, SSRI medications to treat the underlying Trichotillomania.
* Multidisciplinary Follow-up: Regular follow-up with GI specialists and psychiatrists to monitor for symptoms of recurrence.

6. Frequently Asked Questions (FAQ)

1. Is a trichobezoar life-threatening?
Yes, if left untreated, it can lead to gastric perforation, severe obstruction, or peritonitis, which are medical emergencies.

2. Can a trichobezoar be dissolved with medication?
Unlike phytobezoars (which may respond to enzymatic agents like cellulase), trichobezoars are made of keratin and do not respond to chemical dissolution. They require mechanical removal.

3. What is Rapunzel Syndrome?
It is a rare form of trichobezoar where the "tail" of the hair mass extends from the stomach into the small intestine, potentially causing obstruction throughout the GI tract.

4. How do doctors distinguish a bezoar from a tumor?
Imaging (CT scan) and endoscopy are used. A bezoar has a distinct appearance, and endoscopy allows the physician to touch or biopsy the mass to confirm it is composed of hair.

5. Does everyone who eats hair develop a bezoar?
No, but those who engage in chronic trichophagia are at high risk. The rate of accumulation depends on the volume of hair ingested and gastric motility.

6. Will I need surgery if I have a trichobezoar?
Surgery is usually required for large bezoars. Smaller ones may be removed endoscopically, but the size and hardness of the mass are the primary determining factors.

7. Can a trichobezoar recur after surgery?
Yes. If the underlying habit of hair-pulling and hair-eating is not addressed through psychiatric treatment, the patient may develop another bezoar.

8. What are the first signs of a bezoar?
Common early signs include abdominal discomfort, a feeling of fullness, bad breath, and unexplained weight loss.

9. How long does the recovery take after surgery?
Recovery depends on the surgical approach (laparoscopic vs. open). Most patients spend a few days in the hospital, with a return to normal diet usually occurring within a week.

10. Is this condition common in children?
It is most frequently seen in adolescent females but can occur in any age group with underlying psychiatric or developmental challenges.

Related Clinical Integration

In the management of complex trichobezoars, particularly those presenting with complications such as gastric perforation or bowel obstruction, surgical intervention is often required to achieve definitive clearance. During these procedures, surgeons may utilize Adson Forceps (with teeth) / ملقط أدسون (بأسنان) for precise tissue handling and retraction during the gastrotomy or enterotomy. In cases where the patient presents with acute abdomen or hemodynamic instability due to secondary complications, an Exploratory Laparotomy (Damage Control) / فتح البطن الاستكشافي (للتحكم بالضرر) (عملية كبرى في غرف العمليات) is indicated to safely remove the hair mass and assess the integrity of the gastrointestinal tract, ensuring optimal clinical outcomes within our hospital system.