Dermatology

A 6-cm midline tail-like soft tissue appendage was noted on the back of this newborn infant at the level of L5. An epithelialized mid-sacrum dimple was also present inferior to the appendage. The infant otherwise appeared to be normally developed.

A pruritic lesion on the arm of a 26-year-old woman had grown to 22 cm while she was "treating" the eruption with a topical corticosteroid.

An 82-year-old man with Alzheimer's disease and atrial fibrillation was referred for evaluation of a lesion present for an undetermined period. It was initially noted 1 week earlier, at his first office visit with a geriatrician.

A 16-year-old girl was bothered by ankle pain and “red spots” on her lower legs. These symptoms cleared in a few days without treatment. Six weeks later, after returning from an all-day outing at a fair, she noticed that the spots reappeared and hemorrhagic lesions developed on the right ankle and left heel. After removing her shoes, the teen-ager felt severe pain in both ankles, particularly the right.

Livedo reticularis is the cutaneous manifestation most frequently associated with the antiphospholipid syndrome (APS). It manifests as a dusky, violaceous vascular discoloration with a reticulated pattern on the upper and lower extremities.

An otherwise healthy 76-year-old woman with no chronic systemic conditions requested removal of a left lower eyelid growth she feared was cancerous. The patient was correct; excision of the lesion and histologic examination confirmed basal cell carcinoma.

A 1 × 0.5-cm hemorrhagic, polypoid lesion that had been present for 2 months on a 13-year-old boy's left anterior chest was excised. Pathologic examination confirmed the diagnosis of pyogenic granuloma.

A 32-year-old woman became concerned about the numerous bumps on her upper face, which had been increasing in number for many years. Examination revealed clusters of 2- to 3-mm lesions-mostly monomorphic, flesh-colored papules lateral to the eyebrows and on the central forehead, inferior-medial eyelids, and upper cheeks. Some of the papules had a slight pink or yellow-brown appearance, and poorly demarcated brown patches (melasma) were noted on the cheeks.

Lichen planus is characterized by flat-topped, polygonal, purple pruritic papules that have a predilection for flexor aspects of the wrists and forearms, sides of the neck, thighs, shins, and lower back. Lesions on the oral mucosa appear as white, lacy patches.

This is a common infectious problem, especially among school-age children. In many cases, there are well-defined areas of hair loss that can mimic alopecia areata.

A 69-year-old man with a history of basal cell carcinoma of the face and back presented for a 6-month skin cancer evaluation. Physical examination revealed an asymmetric, irregularly pigmented, thin brown plaque of the anterior chest. A 3-mm punch biopsy specimen was obtained from a deeply pigmented area at the inferior border of the lesion to rule out melanoma.

A scaling, red, fissured area between digits 4 and 5 on her right hand sent a 33-year-old woman to her physician. Diagnosis of interdigital Candida was confirmed by a potassium hydroxide evaluation of material from the site.

The parents of a 2-year-old boy were curious about the “bump” near their son's eye, which they had first noticed about 6 months earlier. The cystic mass in the right medial canthal region measured 8 mm in diameter. It was nontender.

A 40-year-old woman presented for follow-up of a generalized skin condition that was most severe on her palms and soles. She had been born with a few lesions, which resolved in infancy. New lesions began to emerge and increase in number and severity when she was 2 years old; they have recurred intermittently for 38 years.

Erythromycin had been prescribed for a 15-year-old boy who complained of flulike symptoms. Twenty-four hours after starting the medication, he awakened with painful ulceration of his mouth and lips. The erythromycin was discontinued, and hydroxyzine (25 mg, three times daily) was started for possible macrolide sensitivity. His condition worsened over the next 3 days, however, and he was hospitalized when the severe oral pain made it impossible for him to tolerate food or drink. At no point had he any nausea, vomiting, diarrhea, fever, or chills.

This lesion on her knee had been present for 5 years, reported a 22-year-old woman. It was not related to any trauma, and its size had not changed, but occasionally it became darker or lighter.

Gonococcal infection is the leading cause of bacterial arthritis in adults.

A 75-year-old man complained of the sudden appearance of multiple “moles” on his back. He had no history of skin cancer. Past medical history was significant for prostate cancer, which had been diagnosed and treated 2 years previously.

Mongolian spots are congenital, hyperpigmented, usually gray areas of varying size and shape. They result from the abnormal occurrence of melanocytes in the lower half of the dermis and are found most frequently in the sacrococcygeal and gluteal areas.

A 19-year-old man was referred for further investigation of multiple pigmented cutaneous lesions.

These collections of dilated vessels deep in the dermis and subcutaneous tissue are present at birth. They usually present as bluish or reddish lesions that are cystic, firm, and compressible. About 60% to 80% of cavernous hemangiomas undergo spontaneous involution, often with central clearing and fibrosis.

Although tinea versicolor is fairly common, its appearance on the face and neck is unusual, notes Robert P. Blereau, MD of Morgan City, La. His patient, a 30-year-old woman, exhibits the pale, rounded, fine-scaled lesions typically found on tanned or dark-skinned persons.

During a routine physical examination of a healthy 7-year-old African-American boy, this striking-and puzzling-hyperpigmentation was noted on his palms.

These are hyperpigmented, regularly bordered, sharply demarcated macules that are usually tan or light brown in whites and dark brown in dark-skinned persons. The lesions are characterized by an increased number of melanocytes and an increased amount of melanin in the epidermis.

A 6-year-old African American boy is referred for evaluation of “cellulitis,” which had persisted for several weeks. The condition had failed to respond to oral antibiotics prescribed by another practitioner.