A 6-year-old girl complains of left foot pain and inability to bear weight, with redness and soft-tissue swelling. Patient and mother do not remember any specific trauma or event prior to onset of pain.

A 13-year-old girl with a recent diagnosis of a bone tumor.

A 63-year-old man with a 10-day history of pain on the left side of his chest that he described as burning and spreading to the right side.

A woman in her late 40s with increasing knee pain. She had suffered a twisting injury and fall on her left knee a decade ago.

An active 18-year-old athlete presents with lower back pain.

A 40-year-old man with history of acute promyelocytic leukemia presents with dyspnea.

A 17-year-old patient who was previously involved in a motor vehicle accident.

A 72-year-old man with history of chronic obstructive pulmonary disease and coronary artery disease presented with worsening dyspnea and hypotension, requiring a central line placement.

A 28-year-old man fell on his right, extended arm during a bike trip. Pain and swelling in the cubital region, as well as limitation in elbow movement, were present. A few days later, the patient noticed a motoric deficit in thumb flexion.

A 73-year-old woman came to the emergency department because she has been experiencing shortness of breath for one week.

A 76-year-old man with abdominal pain and nausea. An abdominal x-ray was performed on admission.

A 50-year-old women undergoing neuroimaging for workup of left occipital headache irradiating to the nuchal region and the left arm. There is no history of trauma or previous medical history.

A 33-year-old man presents with a six-month history of continuous pain in the right groin, which increases with physical activity. There is no history of trauma. Previous medical history includes a jumper’s knee and an ankle distortion.

A 52-year-old man with a history of chronic pancreatitis presents to the emergency room with pain of both ankle and knee joints bilaterally, and presence of a unique painful erythema nodosum at the head of the left fibula associated with erythematous plaques at the back of the right foot and the right knee.

A 40-year-old woman presents with a painless right axillary mass.

A 71-year-old woman with a known history of left breast cancer with axillary lymphadenopathy, awaiting surgery. She presented after developing new left neck and shoulder pain. Patient has pain in the left shoulder with all movements and anterior joint line tenderness.

A 50-year-old woman presents with chronic thoracic back pain.

A 27-year-old man, a known intravenous drug user, presents with severe pain and tenderness over the pubic area. A pelvic radiograph and an MRI scan of the pelvis were performed.

An 86-year-old man who is normally fit and well was admitted with a two-day history of abdominal pain, distension, and vomiting.

A 28-year-old woman presents with a three- to four-month history of progressively worsening lower back pain in the absence of any trauma, neurology, or constitutional symptoms.