Every specialist saw a piece. No one saw the pattern.

Persona

Chioma, 41, Female, Nigerian-British, Secondary school teacher.

For four years, Chioma has had joint pain in her knees and fingers, fatigue that can stop her from finishing the school day, brain fog, mouth ulcers, bloating, loose stool, and cramping. Rheumatology said it was not lupus or RA. Gastroenterology said it was not Crohn's or UC and called it IBS by exclusion. Neurology said it was not MS. She takes no medication and has been told stress may be part of it.

Family history: Maternal aunt: celiac disease. Mother: rheumatoid arthritis.

Clinical picture

Symptoms

• Joint pain — knees and fingers, worse in the morning
• Fatigue severe enough to interrupt the school day
• Brain fog — difficulty word-finding and concentrating mid-afternoon
• Recurring mouth ulcers — several episodes per year, each lasting a week or two

Labs

• CRP (C-reactive protein): 6.8 mg/L (<1.0 mg/L)
• tTG-IgA (anti-tissue transglutaminase): 4.2 U/mL (<7 U/mL)
• Ferritin: 11 µg/L (20–200 µg/L)
• Vitamin D (25-OH): 9 ng/mL (30–80 ng/mL)
• Vitamin B12: 188 pg/mL (200–900 pg/mL)

Medications

• No current medications

Supplements

• None

Lifestyle

• Diet: varied, had informally reduced bread and pasta over the past 12 months after noticing gut symptoms improved
• Exercise: light walking, reduced due to fatigue and joint pain
• Alcohol: occasional — 1–2 drinks per week
• Sleep: disrupted — wakes with joint stiffness most mornings
• Non-smoker
• Occupation: secondary school teacher, on her feet most of the day

Genetics

• HLA-DQ2.5 DQA1*05:01 / DQB1*02:01 (HLA-DQ2.5 positive): Chioma carries the main genetic risk marker seen in most people with celiac disease. Her negative antibody test is less reassuring because she had already been cutting gluten for a year.
• IL-6 rs1800795 (G>C, -174 promoter, high-producer variant) (High IL-6 producer): Chioma's body makes stronger inflammatory signals than average, so a gut trigger can show up as joint pain, fatigue, and brain fog.
• TNF-alpha rs1800629 (G>A, -308, high-producer variant) (High TNF-alpha producer): A second inflammatory amplifier helps explain why her joints, mouth, gut, and energy crash together instead of acting like separate problems.
• CTLA4 rs3087243 (G allele, reduced T-cell downregulation) (Reduced CTLA4 brake function): Her immune system has a weaker-than-average brake pedal — so once inflammation starts, it takes longer to wind down, which explains why her symptoms linger long after an obvious flare.

She planned her life around symptoms no one could name

Chioma is a secondary school teacher. She plans lessons around pain, fatigue, and brain fog: which classes she can teach standing, which afternoons need lower mental load, which days might collapse. Over four years, each specialist looked at one part of the story. Rheumatology ruled out lupus and RA. Gastroenterology ruled out Crohn's and UC. Neurology ruled out MS. Her family doctor raised stress. She reduced stress. Nothing changed. The problem was not that no one looked carefully. It was that no one looked at everything together.

The clues sat in different folders

Specialists are organized by body system: joints, gut, nerves. That works well for many diagnoses. Chioma's pattern did not stay in one system. Joint pain, gut symptoms, fatigue, brain fog, and mouth ulcers moved together. Her blood inflammation stayed high. Her celiac antibody was technically normal but close to the line. Her ferritin, vitamin D, and B12 were all low in a way that can fit poor absorption in the small bowel. Each clue looked incomplete alone. Together, they formed a pattern.

The normal celiac test had a catch

Chioma's celiac antibody test looked normal. But for a year before the test, she had been eating less bread and pasta because her gut felt better without them. That detail changes the meaning of the result. The antibody test depends on gluten exposure. Eat less gluten, and the antibody can fall, even in someone who needs a proper celiac workup. Her HLA-DQ2.5 result does not diagnose celiac disease, but it keeps it firmly on the table. So do the low ferritin, low vitamin D, low B12, and family history. The missing step is a proper gluten challenge followed by repeat testing.

One trigger could explain many rooms of the house

The gut clue still leaves a question: why joints, mouth ulcers, fatigue, and brain fog? Chioma's inflammatory genetics help connect those dots. Her IL-6 and TNF-alpha variants can turn a local trigger into a stronger whole-body signal. Her CTLA4 result suggests the immune brake may be slower to settle things down. That does not diagnose an autoimmune disease by itself. It explains why one ongoing trigger could feel like several separate illnesses at once.

Five clinical next steps

• Ask her family doctor about a formal gluten challenge: normal gluten intake, such as at least 2 slices of bread or equivalent per day for 6 weeks, followed by repeat celiac antibodies and possible referral for small bowel biopsy.
• Treat the nutrient deficiencies while the investigation continues. Low ferritin, vitamin D, and B12 are clinically meaningful and should be rechecked after replacement, usually in 8–12 weeks.
• Bring the full pattern to her family doctor in writing: elevated inflammation, borderline celiac antibody after reduced gluten, HLA-DQ2.5, low ferritin, low vitamin D, low B12, and family history of celiac disease and rheumatoid arthritis.
• Use an anti-inflammatory eating pattern while the workup proceeds. A Mediterranean-style diet with olive oil, fish or algae omega-3s, legumes, vegetables, and minimal ultra-processed food fits her IL-6 and TNF-alpha profile.
• Track symptoms during the gluten challenge. Daily notes on gluten intake, gut symptoms, joint pain, fatigue, and brain fog can make the pattern easier for gastroenterology to evaluate.

Eight weeks of tracking — through the gluten challenge and out the other side

Gluten challenge tracking · B12 · ferritin · vitamin D daily. Chioma tracked gluten challenge days, supplements, and symptoms for 8 weeks. The first three weeks were hardest because she was deliberately eating gluten again. After testing, she switched to strict gluten-free and started B12, iron, and vitamin D. By week 5, the improvement was visible.

• Week 1: Starting the gluten challenge. Symptoms worse already — this is hard.
• Week 2: Worst joint pain in months. But I am documenting it all.
• Week 3: Gut symptoms bad. One missed day when I was too exhausted.
• Week 4: Challenge done. Switching to strict gluten-free today. Starting B12 and iron.
• Week 5: First week feeling slightly better. Brain fog lifting a little.
• Week 6: Energy improving. Joint pain noticeably better than last month.
• Week 7: Referral letter sent. Feeling hopeful for the first time in four years.
• Week 8: Perfect week. Gastro appointment confirmed. I finally have a direction.