Allergy, Immunology, and ENT

My 18-month-old son has had a diaper rash, with no other symptoms, within a few days of eating a poached egg on 3 separate occasions.

This 9–month–old boy was initially evaluated at age 6 weeks for an extensive eczematous rash on the head and antecubital and diaper areas and blood and mucus in the stool with each diaper change over a 2– to 3–week period. The symptoms were attributed to milk allergy, and the infant’s formula was changed. At 8 weeks of age, a petechial rash developed on the boy’s trunk and legs. His symptoms persisted despite multiple formula changes, and he was referred to the emergency department.

A 7-month-old boy with a history of severe atopic dermatitis and asthma was brought for evaluation of a generalized rash, fever, and irritability of 2 days’ duration. He had no respiratory symptoms. His medical history was significant for anorexia, without vomiting or diarrhea. He had a strong family history of allergy.

At his first well-child visit after a family move, an 8-year-old boy was noted to have bilateral erythematous plaques on the surfaces of his hands and feet. Mother reported that the condition had been present since he was 2 or 3 months old. Patient’s father and other male relatives on the paternal side (uncles, grandfather, great-grandfather) were similarly affected. No other associated symptoms, such as hyperhidrosis, reported. The child did not have a history of eczema, asthma, or food allergies; however, he did have a history of allergic rhinitis and occasional pruritus.

“Drug rash” is a common pediatric complaint in both inpatient and outpatient settings. This term, however, denotes a clinical category and is not a precise diagnosis. Proper identification and classification of drug eruptions in children are important for determining the possibility of-and preventing progression to-internal involvement. Accurate identification is also important so that patients and their parents can be counseled to avoid future problematic drug exposures.

Match the photographs of the rashes with the correct diagnosis.

Allergy testing can aid the diagnosis of allergic disorders; however, it is not diagnostic. With skin testing, in particular, a positive result does not necessarily indicate clinical allergy, and a negative result does not always exclude clinical relevance.

A 16-month-old girl was initially brought to her primary care physician because of persistent nonproductive cough of 1 to 2 weeks’ duration, with lethargy, poor feeding, and worsening cough for the past 36 hours. She had been afebrile. The patient was noted to be pale and had a decreased level of interaction. She was promptly sent to the local emergency department. Laboratory studies showed a hemoglobin level of 3.8 g/dL and hypochromic microcytic anemia. The patient was subsequently transferred to the pediatric ICU for evaluation.

Episodic right-sided facial flushing was noted in a 2-month-old girl born at full term via forceps-assisted vaginal delivery. The erythema appeared within minutes of latching onto her mother’s breast and resolved within 5 to 10 minutes after breastfeeding. The episodes of flushing had begun a week before the clinic visit; there were no collateral symptoms of anaphylaxis. Because food allergy was suspected, the mother had eliminated all dairy products from her diet.

Circumscribed erythematous lesions developed on the back and abdomen of this 19-month-old boy. The rash was mildly pruritic. The parents gave the child 1 dose of diphenhydramine, and the rash resolved after an hour. About 12 hours later, new lesions developed on the face, neck, and upper back. The child was given the same treatment and the symptoms resolved. The following morning, widespread lesions were noted on the child's face, neck, trunk, and extremities.

A 5-month-old Asian boy was brought for evaluation of hair loss and a red, scaly rash on the scalp and body. The rash had not responded to hydrocortisone 2.5% ointment. There was a family history of asthma, food allergies, and allergic rhinitis. His mother had Hashimoto thyroiditis.

A 5-month-old girl with progressively worsening generalized rash of 3 weeks’ duration. No obvious sensitivity, fever, recent infection, medication use, or known contact with irritant.

For 2 days, a 17-year-old boy had a widespread pruritic eruption that involved the trunk and extremities but spared most of the face. Many of the lesions were annular, and they would appear and resolve within 1 day. The patient denied shortness of breath, difficulty in swallowing, and periorbital swelling.

A 7-year-old boy with annular, asymptomatic, flesh-colored lesion onthe wrist that had developed slowly over the past month. The parents hadremoved the child from school because they were told that the lesion wasringworm. The lesion had failed to resolve after application of an antifungalcream for 10 days.

A 4-year-old boy presented for further evaluation of persistent right hip painof 2 months’ duration. Before the onset of the pain, he had been limping,favoring his right side. For several days before he was brought in forevaluation, he had had fevers and sweating in addition to the right hippain.

I enjoyed Dr Kirk Barber’s interesting Dermclinic quiz featuring a 5-year-old boy with a dramatic resentation of tinea corporis (CONSULTANT FOR PEDIATRICIANS, February 2009, page 43). I am curious to know why Dr Barber prescribed oral terbinafine for this patient.

A persistent, eczematous dermatitis had developed in the perioral area during the winter months in this 10-year-old boy. Topical corticosteroid creams had been tried, and these seemed to help some, but the ondition never really cleared. Because of the failure of the corticosteroid creams, a topical antifungal cream had also been tried; however, this, too, was of limited effectiveness.

An 18-month-old white boy is brought to his well-care visit by his parents, who are concerned that for the past month he has been less social and active. He has appeared weak and has refused to walk or play with his siblings. He has also had a decreased appetite and has lost about 2 kg. He has vomited several times but with no bile or blood.

The most common chronic medical problem that we pediatricians treat is asthma. We do our best to manage our patients’ asthma by prescribing controller medications, providing asthma action plans, and guiding families through acute exacerbations. We often ask about possible environmental triggers, such as tobacco smoke and cockroaches, and we advise patients to reduce their exposure to those triggers.

The most common chronic medical problem that we pediatricians treat is asthma. We do our best to manage our patients' asthma by prescribing controller medications, providing asthma action plans, and guiding families through acute exacerbations. We often ask about possible environmental triggers, such as tobacco smoke and cockroaches, and we advise patients to reduce their exposure to those triggers.

For the past few weeks, a 10-year-old boy had a pruritic abdominal rash that had not responded to over-the-counter topical medications. The rash had appeared around the time he started wearing a new belt (shown). The child was otherwise healthy. There was a family history of asthma.

Twenty-two-month-old girl seen in the emergency department (ED) after several hours of abdominal pain associated with non-bloody, non-bilious emesis. Over past 2 months, has had 7 or 8 similar episodes of abdominal pain followed by emesis 1 to 2 hours later.

With the banning of peanut butter and jelly from some school cafeterias, peanut allergies have become a popular topic in the media and the public. Discussions often include references to an increasing prevalence of allergies, as well as to an earlier emergence of those allergies in children.

The National Heart, Lung, and Blood Institute and National Asthma Education and Prevention Program (NAEPP) released its Expert Panel Report 3 (EPR-3): Guidelines for the Diagnosis and Management of Asthma--Full Report, in August 2007.1 The EPR-3 is the fourth iteration of the guidelines, which were first released in 1991 (EPR-1), revised in 1997 (EPR-2), and partially revised in 2002 (Update on Selected Topics). For the first time since their inception, the guidelines include separate recommendations specific to children aged 0 to 4 years and 5 to 11 years. Table 1 highlights the key differences between the 1997 EPR-2 guidelines and the 2007 EPR-3 guidelines regarding treatment of pediatric asthma.

With the banning of peanut butter and jelly from someschool cafeterias, peanut allergies have become a populartopic in the media and the public. Discussions ofteninclude references to an increasing prevalence ofallergies, as well as to an earlier emergence of thoseallergies in children.