A 60-year-old male presents with swelling and pain in the knee. ...

[pane00]

A 60-year-old male presents with swelling and pain in the knee. CT reveals a tumor has devel-oped from a pre-existing benign bone lesion. This supports which diagnosis?
 
  a. Secondary chondrosarcoma
  b. Rhabdomyoma
  c. Rhabdomyosarcoma
  d. Fibrosarcoma

Question 2

To make a diagnosis of fibromyalgia, tenderness must be present in ____ of the 18 points neces-sary for diagnosis.
 
  What will be an ideal response?

[deja]

Answer to Question 1

ANS: A
Chondrosarcoma is the second most common primary malignant bone tumor and is a tumor of middle-aged and older adults. Chondrosarcomas that develop from a pre-existing benign bone lesion are known as secondary chondrosarcomas. Rhabdomyoma is an extremely rare benign tu-mor of muscle that generally occurs in the tongue. The malignant tumor of striated muscle is called rhabdomyosarcoma. A fibrosarcoma is a solitary tumor that most often affects the met-aphyseal region of the femur or tibia.

Answer to Question 2

11

Tenderness in 11 of these 18 points is necessary for diagnosis along with a history of diffuse pain.