A unique association of unilateral idiopathic calcinosis cutis with ipsilateral porokeratotic eccrine ostial and dermal duct nevus

Idiopathic Calcinosis Cutis in a Child: Report of a Rare Case

Calcinosis cutis is characterized by the deposition of calcium salts in the skin and subcutaneous tissue. Calcinosis cutis has different types, but the idiopathic type is considered the rarest type. We present the case of a 10-year-old boy who presented with a skin lesion on his right knee. No other similar nodules were noted elsewhere in the body. The lesion was first noted one year ago, and it slightly increased in size. The lesion was not pruritic and did not ulcerate. No history of previous trauma was provided. On physical examination, a nontender, firm, immobile, reddish, solitary nodule of 2 cm in diameter was observed on the extensor surface of the right knee. The patient underwent complete laboratory investigations that included hematological, biochemical, and immunological parameters, which yielded normal results. Excisional biopsy was performed, and histopathological examination revealed well-circumscribed deposits of basophilic materials in the subcutaneous tissue that is consistent with calcium deposits of calcinosis cutis. Idiopathic calcinosis cutis is a rare condition in children, particularly if it has a unilateral distribution. Proper evaluation should be performed to rule out any associated metabolic or systemic disorders that may alter the management pathway.

Epidermal Nevi: What Is New

This article reviews the clinical findings of epidermal nevi and their associated syndromes and provides an update on their pathogenic genetic changes as well as targeted therapies detailed to date.

Idiopatic Auricular Calcinosis Cutis

Calcinosis cutis is a rare disease characterized by the deposition of insoluble calcium phosphate crystals in the epidermis. Etiologically it is divided into 4 types: dystrophic, metastatic, iatrogenic and idiopathic. The most common type is the dystrophic type and the rarest idiopathic type. The pathophysiology of calcinosis cutis is not clearly known. Its definitive diagnosis is made histopathologically by showing calcium accumulation in the skin and clinically excluding other types. A pediatric patient was admitted to our clinic with a left auricular mass, and histopathological findings were diagnosed as idiopathic calcinosis cutis. Our case is presented in the light of literature because it is seen in auricula, an atypical localization of idiopathic calcinosis cutis, which is a rare type.

Unilateral Idiopathic Calcinosis Cutis: A Case Report

Calcinosis cutis is a rare disorder characterized by the deposition of calcium in the skin and subcutaneous tissue. Unilateral idiopathic calcinosis cutis has only rarely been reported in the literature. Here, we report the case of a 7-year-old healthy girl who presented with multiple asymptomatic hard nodules on the right side of her body. Histopathological, radiological, and extensive blood investigations confirmed the diagnosis of unilateral idiopathic calcinosis cutis.

Somatic Mosaicism for a "Lethal" GJB2 Mutation Results in a Patterned Form of Spiny Hyperkeratosis without Eccrine Involvement

BACKGROUND

Spiny hyperkeratosis refers to a rare clinical phenotype characterized by nonfollicular keratotic projections and sometimes associated with other acquired and inherited conditions. We describe a case of congenital patterned spiny hyperkeratosis.

METHODS

To identify the cause of this disorder, we used a combination of whole exome sequencing, direct sequencing and TaqMan assay.

RESULTS

We found that the peculiar clinical features displayed by the patient are due to somatic mosaicism for a heterozygous mutation in the GJB2 gene.

CONCLUSION

Because histopathologic examination of two independent biopsies did not reveal porokeratotic eccrine ostial and dermal duct nevus (PEODDN), previously reported to result from somatic mutations in GJB2, it appears that mutations in this gene can cause nevoid spiny hyperkeratosis in the context of PEODDN or as an isolated finding.