Battered Child Syndrome — Multiple Fractures of Varying Ages MCQ — NEET PG Practice Question | NEETPGAI
Battered Child Syndrome — Multiple Fractures of Varying Ages
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shield Forensic Medicine
A 7-month-old infant is brought to the emergency department with a history of refusal to use the left arm. The mother provides an inconsistent story, first stating the child "fell off the sofa," then changing it to being "rolled on by an older sibling." On examination, the child shows frozen watchfulness, healing bruises on the torso and buttocks, and a healing torn frenulum. A skeletal survey reveals multiple bilateral posterior rib fractures at varying stages of healing, a spiral fracture of the left humeral shaft, and the lesions marked **B** at the distal femora bilaterally. The child is admitted under child protection protocols. Which of the following best describes the radiographic significance of the lesions marked **B** in the context of non-accidental injury?
A. Epiphyseal separation fractures — typical of birth trauma and requiring assessment for coagulation disorders
B. Classic metaphyseal lesions (bucket-handle fractures) — pathognomonic for child abuse, resulting from violent twisting or yanking of the limbs
C. Transverse metaphyseal fractures — commonly seen in accidental falls and consistent with the mother's account of trauma
D. Greenstick fractures of the metaphyseal region — indicative of metabolic bone disease and requiring biochemical screening
Explanation
Why Classic metaphyseal lesions (bucket-handle fractures) — pathognomonic for child abuse, resulting from violent twisting or yanking of the limbs is right
The lesions marked B are bilateral classic metaphyseal lesions (CMLs), also called bucket-handle or corner fractures. These are small chip avulsions of the metaphyseal margin produced by violent twisting, yanking, or rotational forces applied to the limbs. According to Kleinman's Diagnostic Imaging of Child Abuse and Modi's Textbook, the classic metaphyseal lesion is the SINGLE most specific radiographic finding for non-accidental injury in infants. In this case, the bilateral presentation at the distal femora, combined with the inconsistent history, frozen watchfulness, healing bruises on non-typical locations (torso, buttocks), and other injuries (posterior rib fractures, spiral humeral fracture), forms a constellation pathognomonic of battered child syndrome. The mechanism of violent limb manipulation required to produce these lesions is incompatible with the mother's vague and changing account.
Why each distractor is wrong
Greenstick fractures of the metaphyseal region — indicative of metabolic bone disease and requiring biochemical screening: Greenstick fractures are incomplete fractures seen in conditions like rickets or osteogenesis imperfecta, not the sharp metaphyseal avulsions characteristic of B. While metabolic bone disease must be excluded in the differential, the bilateral, symmetric, and specific morphology of bucket-handle fractures is far more specific for NAI than for metabolic causes.
Transverse metaphyseal fractures — commonly seen in accidental falls and consistent with the mother's account of trauma: Transverse metaphyseal fractures are non-specific and can occur in accidental trauma. However, the lesions marked B are not transverse but rather classic metaphyseal lesions (bucket-handle/corner fractures), which require violent twisting or yanking — mechanisms incompatible with a fall from a sofa or being rolled on by a sibling. The mother's account is inconsistent and changing, not supported by this specific injury pattern.
Epiphyseal separation fractures — typical of birth trauma and requiring assessment for coagulation disorders: Epiphyseal separations are seen in birth trauma and are distinct from classic metaphyseal lesions. The child is 7 months old, well beyond the neonatal period, making birth trauma an implausible explanation. Furthermore, the bilateral, symmetric presentation and the context of multiple injuries at varying stages of healing point to repeated abuse, not a single birth-related event.
High-YieldNEET PG
Classic metaphyseal lesions (bucket-handle fractures) are pathognomonic for child abuse in infants; they result from violent twisting/yanking and are the single most specific radiographic finding for non-accidental injury.
Modi's Textbook of Medical Jurisprudence and Toxicology, 26th Edition, Chapter on Child Abuse / Battered Baby Syndrome; Kleinman PK, Diagnostic Imaging of Child Abuse, 3rd Edition
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