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A 92-year-old woman presented with a 6-month history of progressively worsening fatigue, weight loss, generalized bone pain, and dyspnea on exertion. A skeletal survey found lytic lesions in the pelvis, sacrum, and calvarium (shown here).

An Elderly Woman With IgA Lambda Multiple Myeloma and Kidney Disease

Five days after a 41-year-old man started taking a new medication, this superficial but painful lesion appeared on his neck. It slowly resolved after the drug was stopped and a topical corticosteroid was applied twice daily.

Five days after starting a new medication, this lesion appeared on a man’s neck. It slowly resolved after the drug was stopped. Which of these drugs do you suspect might have caused the lesion?

Clinical Topics

Round Red Patch on a Man's Neck

An 89-year-old woman with a history of biopsy-proven actinic keratosis on her scalp is seen for a new erosion on the right frontal area. Two weeks of twice-daily mupirocin has brought no improvement and now crusting and purulent exudate are seen. Skin cultures taken show normal flora.

C. Erosive pustular dermatosis of the scalp

E. Chronic actinic damage with secondary infection

An 89-year-old woman is seen for an erosion on the frontal area of the scalp. History is positive for actinic keratosis. What's your Dx?

Crusty Scalp Lesion 

A 76-year-old woman seeks your attention for an asymptomatic “red spot” on her neck. She has a history of multiple non-melanoma skin cancers.

Squamous cell carcinoma in situ (Bowen  disease)

Lichenoid keratosis (an inflammatory variant of seborrheic keratosis)

A 76-year-old woman seeks your attention for an asymptomatic “red spot” on her neck. What does this look like to you?

What's This "Red Spot"?

A 67-year-old woman noted the appearance of several non-tender, rock-hard, purple-colored nodules on her legs. Her medical history was significant for distant non-Hodgkin lymphoma.

A 67-year-old woman noted the appearance of several non-tender, rock-hard, purple-colored nodules on her legs. Her medical history was significant for distant non-Hodgkin lymphoma. The violaceous color and configuration of the skin lesions suggests which of the following? 

Hard Purple Nodules: Your Dx?


These 2 patients presented with a swollen hand and rapidly proximally progressive edema secondary to a bite.

These 2 patients presented with a swollen hand and rapidly proximally progressive edema secondary to a bite. What creature did the biting?

Swollen Hands-What’s Biting?

A 5-year-old boy with a history of atopic dermatitis since 6 weeks of age, presents with a rash around his mouth that has been present for approximately 1 year. The patient’s mother reports that desonide topical cream was applied to the affected area for about 5 days, which initially resulted in improvement, however the rash returned after this medication was discontinued. The rash also recently improved after the patient took amoxicillin for an infection. She also notes that the patient has been licking his lips more frequently.

On examination there is an erythematous papulopustular eruption restricted to the perioral region, with sparing of the vermillion border. Mild hyperpigmentation is noted on the patient’s neck. There is no active involvement of other areas of the body.

The eruption has been present for 1 year and is restricted to the perioral region. What is included in your differential? 

Rash Around the Mouth of a 5-year-old Child

Napat Leeaphorn, MD

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