Peripheral gangrene: A rare presentation of systemic lupus erythematosus in a child

Use of prostaglandin and cyclophosphamide for pediatric lupus with digital gangrene: Back to safety before hitting the axe!

Digital gangrene is a rare presenting feature of childhood lupus and only a reported incidence of 1.3%. We describe two cases of pediatric onset systemic lupus erythematosus (SLE), both 16 years old, presenting with digital gangrene and the successful salvage of the digits after using intravenous cyclophosphamide for immunosuppression and use of intravenous prostaglandin E1 infusions for limb reperfusion. Both of the patients responded exceptionally to the infusions with resolution of gangrene and near-total preservation of the functionality of toes.

A Rare Case of Digital Ulceration and Gangrene as an Initial Presentation of Systemic Lupus Erythematosus in a Child

Systemic lupus erythematosus (SLE) is a complex autoimmune illness with a wide range of symptoms. Tissue-binding autoantibodies and intricate immune complexes are responsible for the initial damage to organs and cellular structures. Dermatological signs, particularly digital gangrene and ulcers, are uncommon in the context of systemic lupus erythematosus and often appear in the advanced stages of the disease. In this discussion, we present an unusual example of early-onset digital gangrene and ulcers in a young kid with systemic lupus erythematosus. It is unusual because SLE is mostly seen in adult patients, but here the patient is a seven-year-old boy who went to the doctor because he had urticarial rashes all over his body and face, skin desquamation, and sporadic fever episodes. The preliminary evaluation had difficulty separating this presentation from acute urticaria. However, further diagnostic testing and serological analysis confirmed the patient's SLE diagnosis. The distal regions of the fingers developed digital gangrene, ulceration, and vasculitis. Clinical and serological tests were used to confirm the diagnosis. Antinuclear antibodies (ANA), anti-ribonuclear protein (Anti-RNP) antibodies, anti-Smith (Anti-Sm) antibodies, and anti-Sjögren's syndrome-related antigen A (Anti-SS-A) antibodies were all positive in the patient. This example emphasizes the critical need to recognize the unusual and severe signs of SLE in medical practice.

Case Report: Extensive digital gangrene as a primary manifestation of late-onset systemic lupus erythematosus

Background: Digital gangrene is a rare but serious complication of systemic lupus erythematosus (SLE). It occurs usually in middle-aged patients with longer disease duration. Case: Herein we report the case of a 56-year-old man (with no history suggestive of Raynaud's phenomenon, diabetes mellitus, smoking, trauma, infection, or chemical exposure), who presented with SLE and digital gangrene was among the first signs. He presented with a one-month history of joint pain, hair loss, photosensitivity, mouth ulcers, malar rash, dyspnea, and digital pain. Physical examination revealed painful and diffuse erythematous skin lesions in the extremities and back, as well as cyanosis in the fingers. We noted lymphocytopenia (600 cells/mm 3), and an elevated C-reactive protein (15.1 mg/l) on laboratory tests. Immunological tests were positive for antinuclear antibodies (ANA) with Title 1:400. Pulmonary computed tomography revealed pulmonary fibrosis, and pulmonary function tests revealed the restrictive pulmonary disease. Diagnosis of SLE with lung involvement was retained. The immunological assessment in search of elements in favor of a vascular origin of the patient's skin lesions was negative. Treatment was initiated with 200 mg/day hydroxychloroquine. For dermal and pulmonary involvement, intravenous (IV) pulse therapy was used with methylprednisolone (1,000 mg/d for three consecutive days monthly) and cyclophosphamide (1 g/month). Calcium blocking agents were also prescribed. However, the lesions did not improve. The patient was given two infusions of rituximab (1 g) at a 14-day interval with a marked improvement ofthe majority of vasculitis lesions, and a partial improvement of dyspnea. Conclusions: Digital gangrene is a rare complication of late-onset SLE, especially as a primary manifestation.

Dosing Recommendations for Pediatric Patients With Renal Impairment

A treatment gap exists for pediatric patients with renal impairment. Alterations in renal clearance and metabolism of drugs render standard dosage regimens inappropriate and may lead to drug toxicity, but these studies are not routinely conducted during drug development. The objective of this study was to examine the clinical evidence behind current renal impairment dosage recommendations for pediatric patients in a standard pediatric dosing handbook. The sources of recommendations and comparisons included the pediatric dosing handbook (Lexicomp), the U.S. Food and Drug Administration-approved manufacturer's labels, and published studies in the literature. One hundred twenty-six drugs in Lexicomp had pediatric renal dosing recommendations. Only 14% (18 of 126) of Lexicomp pediatric renal dosing recommendations referenced a pediatric clinical study, and 15% of manufacturer's labels (19 of 126) described specific dosing regimens for renally impaired pediatric patients. Forty-two products had published information on pediatric renal dosing, but 19 (45%) were case studies. When pediatric clinical studies were not referenced in Lexicomp, the renal dosing recommendations followed the adult and pediatric dosing recommendations on the manufacturer's label. Clinical evidence in pediatric patients does not exist for most renal dosing recommendations in a widely used pediatric dosing handbook, and the adult renal dosing recommendations from the manufacturer's label are currently the primary source of pediatric renal dosing information.

Digital dry gangrene as a primary manifestation of systemic lupus erythematosus

Digital dry gangrene is commonly seen in cases of connective tissue disease such as systemic sclerosis. In systemic lupus erythematosus (SLE) digital gangrene is rare. As initial manifestation, it is again a rare phenomenon because it occurs late in the course of disease. Here we are reporting the case of a woman who was having extensive cutaneous gangrene of her fingers and toes, as a first and foremost presentation without any other typical signs and symptoms of SLE. Her serology was positive for SLE. The patient was treated conservatively and responded well.

[Extensive digital gangrene revealing late-onset systemic lupus erythematosus]

INTRODUCTION

Late-onset systemic lupus erythematosus represents a specific sub-group of the disorder, beginning after 50 years of age. The incidence is rarer and the course of the disease is considered to be more benign. Digital gangrene is an uncommon complication of systemic lupus erythematosus reported especially among middle-aged patients with long disease duration.

OBSERVATION

We report a 53-year-old man, who presented with systemic lupus erythematosus revealed by an extensive digital gangrene.

CONCLUSION

Digital gangrene is a rare complication of late onset systemic lupus erythematosus. Clinicians should be aware of this complication in order to initiate early and aggressive treatment.