Answers

Case 1

29 year old male c/o right knee pain x six months. No trauma.

Giant Cell Tumor of Tendon Sheath

Case 2

38 year old male c/o right knee pain and swelling x5 months. No injury.

Spindle and Epitheloid Cell Sarcoma

Case 3

45 year old male c/o left shoulder and proximal humerus pain x7 months

Enchondroma

Case 4

16 year old male c/o 9 months of left knee pain

Hemangioma of Bone

Case 5

66 year old woman c/o right thigh pain x11 weeks, 20 lb weight loss in 5 weeks

Leiomyosarcoma

Case 6

17 year old female, increasing groin pain x1 month

Worse when getting off and on the couch, with basketball and soccer, hip gives out & clicks

Giant Cell Tumor

Case 7

65 year old c/o right thigh mass x5 years

Lipoma

Case 8

15 year old male seen c/o left elbow mass x5 years, significantly larger over 3 months

Synovial Sarcoma

Case 9

12 year old male c/o left arm progressive moderate pain x5 months, initially attributed pain to football injuries

Osteosarcoma

Case 10

72 year old man left upper arm mass x1 month, accompanied by worsening, constant, dull, minimal pain and tenderness. No injury

Malignant Peripheral Nerve Sheath Tumor

Case 11

4 +7 year old girl c/o a bump just above the left elbow

11/08 had similar painless bump resolved before it was evaluated

Hemangioma

Case 12

5+1 year old boy c/o severe left shin pain x1 month

Langerhan's Cell Histiocytosis/Histiocytosis X/ EG

Case 13

HPI: 80 year old man w/ h/o tumor removed from right forearm in 2002, 2006, and 2008 now states "since last surgery, one bump stayed and one bump went away"

Recurrent Myxoid MFH