A patient presents with severe pain in the upper arm after a fall. The affected area is swollen, and the patient is unable to move the arm without significant pain. Imaging studies reveal a malignant bone tumor in the humerus with a transverse break through the lesion. What is osteosarcoma?

Choice A reason: Hallucinations are positive symptoms of schizophrenia, involving sensory experiences not based in reality, like hearing voices. Negative symptoms involve deficits, such as reduced emotional expression or social engagement. Since hallucinations add to experience, they are not negative, making this incorrect for negative symptoms.

Choice B reason: Apathy, a lack of motivation or interest, is a negative symptom of schizophrenia, reflecting diminished emotional and behavioral responses. It aligns with deficits in normal functioning, a hallmark of negative symptoms, making it a correct choice for this category of schizophrenia manifestations.

Choice C reason: Absence of normal social and interpersonal behaviors, such as social withdrawal, is a negative symptom, indicating reduced engagement and interaction. This deficit in typical social functioning is characteristic of negative symptoms in schizophrenia, making it a correct selection for this question.

Choice D reason: Sensory overload from impaired sensory filtering is not a standard negative symptom; it’s more related to cognitive or positive symptoms like hallucinations. Negative symptoms involve reduced behaviors, like apathy, so this is incorrect for the negative symptom category in schizophrenia.

Choice E reason: Anhedonia, the inability to experience pleasure, is a negative symptom, reflecting a deficit in emotional response. It is a core feature of reduced functioning in schizophrenia, aligning with negative symptom criteria, making it a correct choice for this question.

Choice F reason: Incomprehensible speech, such as disorganized speech, is a positive symptom, adding disordered communication to the patient’s experience. Negative symptoms involve reduced behaviors, like social withdrawal, so this is incorrect for the negative symptom category in schizophrenia.

Choice G reason: Delusions, false beliefs, are positive symptoms, adding to the patient’s mental experience. Negative symptoms involve deficits, such as lack of motivation, not added beliefs. This makes delusions incorrect for the negative symptom category in schizophrenia manifestations.

Choice A reason: A fracture is a bone break, not a joint surface misalignment. Subluxation describes partial joint displacement, matching John’s injury with pain and limited motion, so this is incorrect for the shoulder injury.

Choice B reason: A sprain involves ligament stretching or tearing, not joint surface displacement. Subluxation is partial joint misalignment, fitting the described trauma, so this is incorrect for John’s specific shoulder injury.

Choice C reason: Subluxation is the partial loss of contact between joint surfaces, causing pain and limited motion, as seen in John’s shoulder after trauma. This matches the imaging findings, making it the correct term.

Choice D reason: Dislocation is complete joint displacement, not partial. John’s injury involves partial contact loss, aligning with subluxation, not full dislocation, so this is incorrect for the described shoulder injury.