Plusating tumours include all except –
**Core Concept**
Benign bone tumors are classified into various types based on their histological and radiological characteristics. Plasmacytoma, osteoma, and osteoid osteoma are examples of benign bone tumors. Understanding the characteristics of these tumors is crucial for accurate diagnosis.
**Why the Correct Answer is Right**
The question asks for "plusating tumours", which is a characteristic of certain benign bone tumors. These tumors cause a localized increase in bone density, giving them a "plastic" appearance on radiographs. The correct answer is a type of benign bone tumor that does not exhibit this characteristic.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because osteoma is a type of benign bone tumor that exhibits a characteristic "plastic" appearance due to its high density.
**Option B:** This option is incorrect because osteoid osteoma is a type of benign bone tumor that also exhibits a characteristic "plastic" appearance due to its high density.
**Option C:** This option is incorrect because osteoblastoma is a type of benign bone tumor that exhibits a characteristic "plastic" appearance due to its high density.
**Clinical Pearl / High-Yield Fact**
When encountering a patient with a "plastic" appearance on radiographs, consider the differential diagnosis of benign bone tumors, including osteoma, osteoid osteoma, and osteoblastoma.
**Correct Answer:** D.