Careers  |  Sign In  |  Register  |   Twitter

16-Year-Old Female with Asymptomatic Bump on Ankle

Can you diagnose this case?

David L. Kaplan, MD – 2015 Series Editor

Signs and Symptoms

A 16-year-old female is brought in by her mother due to concerns about an asymptomatic bump on her ankle that has been persistent for at least 3 months. There is no history of trauma. She is otherwise healthy.

What is responsible for her asymptomatic bump?

Choose one to reveal diagnosis and discussion

Melanocytic nevus
Dysplastic nevus
Melanoma
Granuloma annulare
Dermatofibroma

Answer: Granuloma annulare

See the full case at Consultant360

The characteristic appearance of dull erythematous annular lesion with central depression on a young female is consistent with granuloma annulare. While a biopsy will confirm the diagnosis, it is generally not necessary.

Note: While a dermatofibroma will dimple downward on lateral compression, it should not have this clinical appearance. Typically these lesions will resolve in several months without treatment. No treatment has been shown to consistently hasten its demise.

More Cases
38-Year-Old Male with Left Thumb Lesion

Derm Case Challenge

38-Year-Old Male with Left Thumb Lesion
75-Year-Old Female with Rash on Lower Extremities

Test your dermatology knowledge with this week's Derm Case Challenge.

75-Year-Old Female with Rash on Lower Extremities
40-Year-Old Male with Growing Lesion on Back

Can you identify this skin ailment? Take this week's Derm Case Challenge to validate your diagnosis.

40-Year-Old Male with Growing Lesion on Back
45-Year-Old Male with Photodistributed Rash

Derm Case Challenge

45-Year-Old Male with Photodistributed Rash
46-Year-Old Female with Knee and Lower Back Aches

Derm Case Challenge

46-Year-Old Female with Knee and Lower Back Aches
75-Year-Old Female with Rash on Lower Extremities

Test your dermatology knowledge with this week's Derm Case Challenge.

75-Year-Old Female with Rash on Lower Extremities
40-Year-Old Female with Inframammary Rash

Derm Case Challenge

40-Year-Old Female with Inframammary Rash
42-Year-Old Male with Abnormal-Looking Thumbnails

Test your dermatology knowledge with this week's Derm Case Challenge.

42-Year-Old Male with Abnormal-Looking Thumbnails
27-Year-Old Male with Bumps on Scalp and Neck

Derm Case Challenge

27-Year-Old Male with Bumps on Scalp and Neck
29-Year-Old Female with Itching on Lower Extremities

Derm Case Challenge

29-Year-Old Female with Itching on Lower Extremities