# Clinical Cases: Pediatrics in Primary Care

## Case 1: Well-Child Visit with Developmental Concern

### Patient Demographics
- **Age:** 18 months old
- **Sex:** Male
- **Parents:** Both present, first-time parents

### Chief Complaint
Mother: "He's not saying any words yet. His cousin who is the same age is already talking."

### History of Present Illness
Baby Jacob is an 18-month-old boy presenting for his routine well-child visit. His mother expresses concern that he is not yet speaking any words. She notes that he babbles with consonant sounds ("bababa," "dadada") but has no specific words with meaning. He does not say "mama" or "dada" directed at his parents. He does not point to objects he wants; instead, he takes his mother's hand and leads her to what he wants. He does not wave bye-bye. He responds to his name about half the time. He enjoys looking at books but does not point to pictures when asked. He plays by himself, lining up his toy cars in rows, and gets upset if they are moved.

### Birth and Developmental History
- Born full-term via uncomplicated vaginal delivery
- Birth weight 7 lbs 8 oz
- No NICU stay
- Passed newborn hearing screen
- **Gross Motor:** Walked at 13 months, now runs and climbs
- **Fine Motor:** Stacks 2-3 blocks, scribbles with crayon
- **Language:** Babbles but no words
- **Social:** Inconsistent eye contact, prefers to play alone

### Past Medical History
- No significant medical problems
- No hospitalizations
- Immunizations up to date

### Family History
- Father's younger brother: Autism spectrum disorder
- No other developmental concerns in family

### Social History
- Lives with both parents
- No daycare (stay-at-home mom)
- No screen time exposure
- No siblings

### Physical Examination
- **Vital Signs:** Weight 25 lbs (50th percentile), Height 32 inches (50th percentile), Head circumference 48 cm (75th percentile)
- **General:** Active toddler, does not make eye contact with examiner
- **HEENT:** TMs clear bilaterally, red reflexes present
- **Cardiovascular:** Regular rhythm, no murmur
- **Neurological:** Normal muscle tone, symmetric movements, no focal deficits
- **Behavior during exam:** Does not look at examiner's face; focused on spinning wheels of toy car; becomes distressed when toy removed

### Developmental Screening

**M-CHAT-R/F (Modified Checklist for Autism in Toddlers, Revised with Follow-up):**
- Failed 5 items (high-risk score)
- Key failed items:
  - Does not point to show you something interesting
  - Does not follow a point
  - Does not look at you when you call his name
  - Does not bring objects to show you
  - Does not try to get you to watch him

### Clinical Image
![Developmental Milestones Chart](case_01_image.jpg)

*Image: Developmental milestones chart showing expected language, motor, and social skills from birth to 24 months, with red flags highlighted for each age.*

**Image Source:** Wikimedia Commons
**Attribution:** CDC, Public Domain
**URL:** https://commons.wikimedia.org/wiki/File:Child_development_milestones.png

### Assessment and Diagnosis
1. **Positive autism screening (M-CHAT-R/F)** - requires further evaluation
2. **Language delay** - no words at 18 months (expected: 10-25 words)
3. **Social communication concerns** - reduced eye contact, no pointing, no joint attention
4. **Restricted/repetitive behaviors** - lining up toys, distress when routine disrupted

### Red Flags Identified
- No words by 16 months
- No pointing by 12 months (still absent at 18 months)
- No pretend play
- Does not respond consistently to name
- Reduced eye contact
- Family history of ASD (first-degree relative)

### Management Plan

**Immediate Referrals (do not wait):**

1. **Audiology evaluation** - hearing test required for any child with language delay
2. **Early Intervention Program** - state-funded services for children 0-3 with developmental delays
   - Referral made today
   - Services can begin while awaiting formal diagnosis
3. **Developmental Pediatrics or Autism specialty evaluation** - for comprehensive diagnostic assessment
   - Waitlists can be long (3-12 months); refer immediately
4. **Speech-Language Pathology** - through Early Intervention

**Parent Counseling:**
- Validated parents' concerns
- Explained that early screening identifies children who need further evaluation - positive screen does not equal diagnosis
- Emphasized importance of early intervention: intensive behavioral therapy before age 3 produces best outcomes
- Provided resources: Autism Speaks, local support groups
- Reassured that seeking help early is the right decision

**While Awaiting Evaluation:**
- Encourage face-to-face interaction during play
- Narrate activities throughout the day
- Limit screen time (AAP: avoid before 18-24 months except video chat)
- Follow child's interests but expand play variety
- Continue regular pediatric visits

### Follow-Up
- Phone call in 1 week to check on referral progress
- Return visit in 1 month
- Ensure Early Intervention has made contact within 2 weeks

### Teaching Points

1. **Universal autism screening at 18 and 24 months** is recommended per AAP using M-CHAT-R/F

2. **Red flags that require immediate referral:**
   - No babbling by 12 months
   - No pointing or gestures by 12 months
   - No single words by 16 months
   - No 2-word phrases by 24 months
   - ANY loss of language or social skills at any age

3. **Hearing evaluation is mandatory** for any child with language delay - hearing loss is a treatable cause

4. **Early intervention is critical** - services should begin as soon as delay is identified, not after formal diagnosis

5. **Family history of ASD increases risk** - siblings of children with ASD have 10-20% risk

6. **Joint attention deficits** (pointing to share interest, following a point) are early markers of ASD

---

## Case 2: Acute Otitis Media

### Patient Demographics
- **Age:** 2 years old
- **Sex:** Female
- **Accompanied by:** Mother

### Chief Complaint
Mother: "She's been crying and pulling at her right ear since last night. She feels warm."

### History of Present Illness
Sophia is a 2-year-old girl brought in by her mother with ear pain and fever. She developed runny nose and cough 4 days ago, which the mother was managing with supportive care. Last night, she became more irritable, refused to eat dinner, and started pulling at her right ear. She had a temperature of 102.1F (38.9C) at home. She slept poorly, waking frequently and crying. Today she is still fussy and febrile. She has had no vomiting or diarrhea. No rash. She has been drinking fluids.

### Past Medical History
- One prior episode of acute otitis media at 15 months, treated with amoxicillin
- No chronic medical conditions
- Immunizations up to date (including PCV13)

### Social History
- Attends daycare 5 days per week
- No smokers in household
- No bottle propping

### Physical Examination
- **Vital Signs:** Temp 101.8F (38.8C), HR 120, RR 24, SpO2 98%
- **General:** Fussy toddler, consolable in mother's arms
- **HEENT:**
  - Right TM: **Bulging, erythematous, opacified, decreased mobility on pneumatic otoscopy, no visible perforation**
  - Left TM: Mildly erythematous (consistent with crying), mobile, landmarks visible
  - Nasal mucosa edematous with clear discharge
  - Pharynx: Mild erythema, no exudates
- **Neck:** No lymphadenopathy
- **Lungs:** Clear to auscultation bilaterally
- **Cardiovascular:** Tachycardic but regular, no murmur

### Clinical Image
![Acute Otitis Media Otoscopy](case_02_image.jpg)

*Image: Otoscopic view comparing normal tympanic membrane (pearly gray, translucent, mobile, landmarks visible) with acute otitis media (bulging, erythematous, opacified, reduced mobility).*

**Image Source:** Wikimedia Commons
**Attribution:** B. Welleschik, CC BY-SA 3.0
**URL:** https://commons.wikimedia.org/wiki/File:Otitis_media_acute.jpg

### Assessment and Diagnosis
1. **Acute otitis media, right ear** - meets diagnostic criteria (acute onset, middle ear effusion with bulging TM, signs of middle ear inflammation)
2. **Upper respiratory infection** - viral, typical prodrome

### Diagnostic Criteria for AOM (all three required)
1. Acute onset of symptoms - YES (developed overnight)
2. Middle ear effusion - YES (bulging TM, decreased mobility)
3. Signs/symptoms of middle ear inflammation - YES (erythema, otalgia)

### Management Plan

**Antibiotic Therapy:**
- **Amoxicillin 90 mg/kg/day divided BID for 10 days**
  - High-dose amoxicillin is first-line
  - Patient weighs 12 kg: 90 x 12 = 1080 mg/day = 540 mg BID
  - Prescribe amoxicillin 400 mg/5mL suspension: 6.75 mL (approx 7 mL) twice daily

**Why NOT observation option:**
- Age under 2 years with unilateral AOM typically warrants antibiotics
- Observation option appropriate for: children 6-23 months with mild, unilateral non-severe AOM OR children 24 months+ with unilateral mild AOM
- This patient has moderate symptoms (high fever, significant irritability)

**Symptomatic Treatment:**
- **Ibuprofen 10 mg/kg every 6-8 hours** PRN for pain and fever
- Warm compress to affected ear for comfort

**Parent Education:**
- Complete entire course of antibiotics even if symptoms improve
- Symptoms should begin improving within 48-72 hours
- Return if: fever persists >72 hours, symptoms worsen, new symptoms develop
- Do not put anything in the ear canal

### Follow-Up
- Recheck not routinely needed if symptoms resolve
- Return if not improving in 48-72 hours
- Consider audiology referral if recurrent AOM (3+ episodes in 6 months or 4+ in 12 months)

### Teaching Points

1. **Diagnosis of AOM requires three criteria:** acute onset, middle ear effusion (bulging TM, decreased mobility), and inflammation/pain

2. **High-dose amoxicillin (90 mg/kg/day)** is first-line to overcome relative resistance of Streptococcus pneumoniae

3. **Treatment duration:**
   - Age <2 years or severe symptoms: 10 days
   - Age 2-5 years with mild-moderate: 7 days
   - Age 6+ years with mild-moderate: 5-7 days

4. **Observation option (48-72 hours of watchful waiting)** is appropriate for:
   - Children 6-23 months with unilateral, mild, non-severe AOM
   - Children 24 months+ with unilateral or bilateral mild AOM
   - Requires reliable follow-up and ability to start antibiotics if worsening

5. **Switch to amoxicillin-clavulanate if:**
   - Treatment failure after 48-72 hours
   - AOM within 30 days of previous antibiotic course
   - Concurrent purulent conjunctivitis (suggests H. influenzae)

---

## Case 3: Fever in a Young Infant

### Patient Demographics
- **Age:** 6 weeks old
- **Sex:** Male
- **Parents:** First-time parents, both present

### Chief Complaint
Father: "We took his temperature and it was 100.8. He's only 6 weeks old - should we be worried?"

### History of Present Illness
Baby Ethan is a 6-week-old male brought by his parents after they measured a rectal temperature of 100.8F (38.2C) at home 2 hours ago. They noticed he felt warm during feeding. He has been feeding well until today - he breastfeeds every 2-3 hours and has been having 6-8 wet diapers daily. Today he fed for a shorter time at his last two feeds and seems "less interested." He has not been as active as usual. No cough, runny nose, vomiting, or diarrhea. No rash. No sick contacts. No recent immunizations (his 2-month vaccines are not yet due).

### Birth History
- Born at 39 weeks via uncomplicated vaginal delivery
- Birth weight 7 lbs 2 oz
- No NICU stay
- GBS status: Mother was GBS positive, received adequate intrapartum antibiotics
- No neonatal complications

### Past Medical History
- No medical problems
- No hospitalizations since birth
- Circumcised at 2 weeks without complication

### Physical Examination
- **Vital Signs:** Temp 100.9F (38.3C) rectal, HR 168, RR 44, SpO2 99%
- **Weight:** 4.5 kg (appropriate weight gain from birth)
- **General:** Quiet infant, arousable but not as vigorous as parents describe at baseline
- **HEENT:** Anterior fontanelle soft and flat, moist mucous membranes, TMs normal bilaterally, red reflexes present
- **Cardiovascular:** Tachycardic, regular, no murmur, normal pulses
- **Lungs:** Clear, no increased work of breathing
- **Abdomen:** Soft, non-distended, no hepatosplenomegaly
- **Skin:** No rash, no petechiae, capillary refill 2 seconds
- **Neurological:** Normal tone, moving all extremities, somewhat decreased activity

### Clinical Image
![Infant Fever Evaluation](case_03_image.jpg)

*Image: Algorithm for evaluation of fever in young infants showing age-based approach with different risk stratification for neonates (0-28 days), young infants (29-60 days), and older infants (61-90 days).*

**Image Source:** Wikimedia Commons
**Attribution:** Based on AAP Guidelines, Educational Use
**URL:** https://commons.wikimedia.org/wiki/File:Infant_fever_algorithm.png

### Assessment
1. **Fever in young infant (29-60 days)** - requires evaluation for serious bacterial infection
2. Decreased activity and feeding - concerning in this age group

### Risk Stratification
This infant is in the 29-60 day age group. While not a neonate (<28 days requiring automatic full sepsis workup), febrile infants 29-60 days still require careful evaluation.

**Clinical Appearance:** Not ill-appearing but somewhat less active than baseline

### Emergency Department Referral and Workup

Given the patient's age (6 weeks) and fever, immediate emergency department referral is indicated for:

**Laboratory Evaluation:**
- Complete blood count with differential
- Blood culture
- Urinalysis and urine culture (catheterized specimen)
- Consider lumbar puncture based on clinical appearance and lab results
- Procalcitonin (if available) - helps risk stratify
- Basic metabolic panel

**Risk Stratification Tools:**
Step-by-step, Rochester, or Philadelphia criteria help identify low-risk infants who may be managed as outpatients, but given decreased activity, this infant warrants thorough evaluation.

### Disposition
- Referred to emergency department for evaluation
- Given decreased activity, likely to require empiric antibiotics pending culture results
- If CSF obtained and normal, and infant is well-appearing with low-risk labs, may consider discharge with close follow-up
- If any high-risk features, admit for IV antibiotics pending 24-48 hour cultures

### Parent Communication
"I know this is scary, but fever in a baby this young needs to be taken very seriously because their immune systems are still developing. We need to send you to the emergency department where they can do blood and urine tests to look for infection. They may also need to check his spinal fluid. It's possible he just has a virus, but we can't take any chances at this age."

### Teaching Points

1. **Fever in neonates (0-28 days): ALWAYS requires full sepsis workup** including blood culture, urinalysis/culture, lumbar puncture, and empiric IV antibiotics - regardless of clinical appearance

2. **Fever in infants 29-60 days:** Risk stratification is appropriate
   - Low-risk criteria can identify infants who may be managed as outpatients with close follow-up
   - High-risk features warrant full workup and empiric antibiotics

3. **Fever is defined as:**
   - Rectal temperature ≥38.0C (100.4F) is the standard
   - Rectal temperature is the gold standard in infants

4. **UTI is the most common serious bacterial infection** in febrile young infants - always obtain urine by catheterization or suprapubic aspiration (bag specimens are unreliable)

5. **Clinical appearance can be misleading in young infants** - even well-appearing neonates can have serious bacterial infection

6. **Viral infections are still most common** cause of fever, but cannot reliably distinguish from bacterial infection clinically in this age group

---

## Key Teaching Points Summary

### Well-Child Care
- Follow AAP periodicity schedule
- Growth monitoring at every visit using WHO charts (<2 years) and CDC charts (2-20 years)
- Developmental surveillance and screening at designated ages
- Anticipatory guidance appropriate to developmental stage

### Developmental Screening
- M-CHAT-R/F at 18 and 24 months for autism screening
- ASQ-3 for global developmental screening
- Red flags: no pointing by 12 months, no words by 16 months, any regression
- Early intervention referral should not wait for formal diagnosis

### Acute Otitis Media
- Diagnosis requires: acute onset + middle ear effusion + inflammation
- High-dose amoxicillin (90 mg/kg/day) is first-line
- Observation option available for select older children with mild disease
- Treatment duration based on age and severity

### Fever in Young Infants
- Neonates (0-28 days): Full sepsis workup regardless of appearance
- 29-60 days: Risk stratification; low-risk may be managed with close follow-up
- 61-90 days: Clinical assessment guides workup
- UTI is the most common serious bacterial infection - always check urine