NursingDiscussion postPathophysiology

NR 507 Week 6: osteogenesis imperfecta and impetigo

Part one is a genetic disease that looks exactly like child abuse, and it carries a third question most answers miss entirely: what the first clinician should have done before calling the police.

Aug 15, 2026

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Last reviewed · August 15, 2026

Written by

Aaron Bishop

MA, Education

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Reviewed by

Dr. Nathan Cole

PhD, Rhetoric & Composition

Argumentation and thesis development

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Interpret the task
Assignment instructions
Deliverables
Proposed outline
Research plan
Reference shortlist
Final review

A genetic disease presenting as suspected abuse

Part one gives you the diagnosis in its physical findings if you read them as a set. Blue sclera, multiple fractures at different ages, a triangular face, a prominent forehead, a sunken chest wall and severe scoliosis in a four-year-old point to osteogenesis imperfecta, not to inflicted injury. The blue sclera is the discriminator: the sclera is thin enough that the underlying choroid shows through, which is a collagen problem rather than a traumatic one. The molecular basis question wants the next level down. Most cases arise from mutations in COL1A1 or COL1A2, the genes encoding the pro-alpha chains of type I collagen. Quantitative defects reduce the amount of normal collagen and produce milder disease; qualitative defects incorporate abnormal chains into the triple helix and are usually worse, because one faulty chain compromises the whole molecule. Type I collagen is in bone, sclera, dentin and ligament, which is why the features cluster the way they do.

The third question is forensic and it carries real weight: what should the initial clinician have done before calling the police. The answer is not that reporting was wrong — suspected abuse is reportable and the duty is to report suspicion, not proof. The answer is that a differential was owed first: a thorough family history for fractures, hearing loss and dentinogenesis imperfecta, a careful examination for sclerae and dentition, a skeletal survey read for fracture pattern and bone density, and consideration of genetic testing or a metabolic bone referral, any one of which would have reframed the case long before it reached a prosecutor. Part two is unrelated and much shorter. Honey-crusted lesions beginning as bullae, spreading by autoinoculation to the forearm in an otherwise well child, is impetigo — most often Staphylococcus aureus, sometimes group A Streptococcus. Give the differential, the mechanism of spread and the treatment split between topical and oral therapy.

Likely learning objectives

Inferred from the brief — check these against your own rubric.

01
Recognise the clinical pattern that distinguishes osteogenesis imperfecta from inflicted injury.
02
Explain the collagen defect at gene and protein level and connect it to the physical findings.
03
Set out the diagnostic work-up owed before a suspicion of abuse is acted upon.
04
Identify impetigo from its lesion morphology and explain its spread and treatment.

Assignment instructionsQuoted verbatim

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Review every instruction before using the planning guidance that follows.

Discussion NR 507 Week 6 Discussion Discussion: NR 507 Week 6 Discussion PART No. 1: You are contacted by an attorney representing a client who has been charged with child abuse and whom faces loss of her child and 15 years in prison. The record indicated that the child was 4 years old and presented to the ER room with a broken arm and a broken leg. There also appeared to be multiple previous fractures. Now, you examine the child and find blue sclera, a sunken chest wall, severe scoliosis, and you observe a triangular face and prominent forehead. You confirm that there have been multiple previous fractures by evaluating the previous X-rays. This is a genetic disorder. What is the most likely genetic disease that this presents and why? What is the molecular basis of this disease? Before, calling the police what should the initial clinician have done? Kindly navigate to for a complete and more resourceful answer. PART No 2: Johnny is a 5-year-old Asian boy who is brought to a family practice office with a “runny” nose that started about 1 week ago but has not resolved. He has been blowing his nose quite frequently and “sores” have developed around his nose. His mother states, “The sores started as ‘big blisters’ that rupture; sometimes, a scab forms with a crust that looks like “dried maple syrup” but continues to seep and drain.” She is worried because the lesions are now also on his forearm. Johnny’s past medical and family histories are normal. He has been febrile but is otherwise asymptomatic. The physical examination was unremarkable except for moderate, purulent rhinorrhea and 0.5- to 1-cm diameter weeping lesions around the nose and mouth and on the radial surface of the right forearm. There is no regional lymphadenopathy. Write a differential of at least three (3) possible diagnoses and explain how each may be a possible answer to the clinical presentation above. Remember, to list the differential in the order of most likely to less likely. Based upon what you have at the top of the differentials how would you treat this patient? When would you allow the student back to school? Elaborate on your reasoning? NR 507 Week 6 Discussion PART No. 3: Keisha, a 13-year-old female, has come into your urgent care center. She has red conjunctiva, a cough and a fever of about 104 F, She also has a rash on her face a possibly the beginning of a rash on her arms. About 10 days ago she was around another student who had similar symptoms. Discussion NR 507 Week 6 Discussion Write three (3) differential diagnoses? What are some of the complications of this disease, assume that the top of your differential is the definitive? Assume that the second item you place on your differential is the definitive diagnosis. What are some complications of that disease? PEER: NR 507 Week No. 6 Quiz Solutions: 1. Considering the pathophysiology of osteoporosis, which cytokines and hormones decrease receptor activator of RANKL expression?(Points : 2) 2. Rhabdomyolysis is characterized by (Points : 2) NR 507 Week 6 Discussion 3. Which type of osteoporosis would a person develop after having the left leg in a cast for 8 weeks to treat a compound displaced fracture of the tibia and fibula? (Points : 2) 4. Considering the pathophysiology of osteoporosis, what are the effects of extracellular signal regulated kinases (ERKs) and receptor activator of RANKL on osteoblasts and osteoclasts? (Points : 2) 5. What is the diagnosis of a person who has tennis elbow characterized by tissue degeneration or irritation of the extensor carpi brevis tendon? (Points : 2) 6. Which statement is false about giant cell tumors? (Points : 2) 7. What pattern of bone destruction is described as not well defined and not easily separated from normal bone? (Points : 2) 8. The pain experienced in Legg-Calvé-Perthes disease is referred to as involving (Points : 2) 9. In osteomyelitis, bacteria gain access to the subperiosteal space in the metaphysis, which is considered the “path of least resistance.” What factor makes this route for bacteria the path of least resistance? (Points : 2) 10. Molecular analysis has demonstrated that osteosarcoma is associated with (Points : 2) 11. Ewing sarcoma arises from (Points : 2) 12. Which serum laboratory test is elevated in all forms of osteogenesis imperfecta? (Points : 2) 13. The _____ is cartilage that retains the ability to form and calcify new cartilage and deposit bone until the skeleton matures. (Points : 2) 14. Osteochondrosis is caused by a(n) (Points : 2) 15. An insufficient dietary intake of vitamin _____ can lead to rickets in children. (Points : 2) NR 507 Week 6 Discussion 16. In latex allergies, which immunoglobulin is associated with an immediate reaction? (Points : 2) 17. Chickenpox may be followed years later by (Points : 2) 18. Cutaneous vasculitis develops from the deposit of _____ in small blood vessels as a toxic response allergen. (Points : 2) 19. Which malignancy is characterized by slow-growing lesions that usually have depressed centers and rolled borders and are frequently located on the face and neck? (Points : 2) 20. Scleroderma is more common in women and is associated with a(n) (Points : 2) 21. Thrush is a superficial infection that commonly occurs in children and is caused by (Points : 2) 22. What is the cause of chickenpox? (Points : 2) 23. Which vascular anomaly is a congenital malformation of dermal capillaries that does not fade with age? (Points : 2) 24. What is a common source of tinea corporis? (Points : 2) 25. Which contagious disease creates a primary skin lesion that is a pinpointed macule, papule, or wheal with hemorrhagic puncture site?(Points : 2)

Turn the brief into deliverables

01
A named diagnosis for part one with the findings that support it.
02
A molecular-level account of the collagen defect.
03
A statement of the work-up the initial clinician should have completed.
04
A diagnosis, differential and treatment plan for part two.
05
APA-formatted scholarly citations.

Working the two parts in order

Read the findings as a set

Assemble blue sclera, fracture history and dysmorphic features into a single diagnosis.

The molecular basis

Name COL1A1 and COL1A2 and distinguish quantitative from qualitative collagen defects.

What was owed before the report

Set out the history, examination, imaging and referral that should have preceded acting on suspicion.

The impetigo case

Diagnose part two, give a short differential, explain autoinoculation and state the treatment.

Sources for the molecular basis and the skin lesions

Recommended databases

NCBI Bookshelf (StatPearls)
PubMed Central
National Institute of Arthritis and Musculoskeletal and Skin Diseases
Your state's mandated reporting statute

Search sequence

1.
Fix the clinical features and inheritance of osteogenesis imperfecta from a reference source before writing the differential.
2.
Read specifically about the imaging findings that distinguish metabolic bone disease from inflicted fracture, since that is the third question's substance.
3.
Confirm current first-line treatment for localised versus widespread impetigo, which has changed with resistance patterns.
4.
Check your own jurisdiction's reporting statute if you plan to comment on the clinician's legal duty.

Reference shortlist

These are authoritative starting points, not a ready-made bibliography. A qualified reviewer must confirm that each source fits the assignment and supports the claim beside which it is cited.

Nothing here is cleared for citation until you have read it.

01
Osteogenesis Imperfecta
StatPearls, NCBI Bookshelf · 2023
Clinical features, classification and the genetic basis, which supplies both the diagnosis and the molecular answer.
02
Osteogenesis Imperfecta
National Institute of Arthritis and Musculoskeletal and Skin Diseases · 2024
A patient-facing institute summary useful for the tissue distribution of type I collagen and for plain-language explanation.
03
Impetigo
StatPearls, NCBI Bookshelf · 2023
Lesion morphology, causative organisms and the topical-versus-oral treatment split for part two.
04
Child Abuse and Neglect
StatPearls, NCBI Bookshelf · 2023
Recognition of inflicted versus non-inflicted injury and the reporting duty, which is what the third question of part one actually turns on.

Review before submission

Common mistakes

Naming osteogenesis imperfecta without explaining why blue sclera follows from a collagen defect.
Answering the molecular question with 'a collagen problem' rather than naming the genes and the helix.
Concluding the clinician should not have reported, when the duty is to report suspicion.
Treating impetigo as a fungal or viral lesion, which the honey crust and bullae rule against.
Answering only part one because it is the more interesting case.

Submission checklist

Have you listed the findings that make osteogenesis imperfecta more likely than abuse?
Did you name the genes and describe the effect on the triple helix?
Does your answer to the third question describe a work-up rather than criticise the report?
Is part two answered with a differential, not just a diagnosis?
Are both parts cited?

Use this guide to plan and review your own work. Follow your institution's rules and read our academic-integrity policy.