Reactive Eccrine Syringofibroadenomatosis Presenting as Bilateral Plantar Hyperkeratosis

A Case of Eccrine Syringofibroadenoma Related to Senile Gluteal Dermatosis

Eccrine syringofibroadenoma (ESFA) is a tumor of eccrine ductal differentiation. ESFA is a rare disease, with only approximately 80 cases reported worldwide. ESFA can be classified into five subtypes. Senile gluteal dermatosis (SGD) was first reported in Japan in 1979. It is a relatively common geriatric dermatosis in East Asia, and characterized by hyperkeratotic lichenified skin lesions in the gluteal region. An 86-year-old woman presented with a solitary recurrent dark brown plaque in the sacral area. There was a hyperkeratotic lichenified brownish patch around the plaque, which was clinically considered SGD. Histopathological examination of biopsy specimen revealed thin anastomosing reticulated strands of basaloid cuboidal cells. The tumor extends from the basal layer of the epidermis to the dermis. These findings are consistent with those of ESFA. The patient was treated with total excision of the skin lesion. Reactive ESFA is related to tissue regeneration and remodeling after damage, such as trauma and burns. There is no literature reporting ESFA related to SGD so far, but there have been few reports of cases occurring in soles or buttocks, which are constantly under pressure. This is the first report on reactive ESFA related to SGD, and further research is needed to reveal the pathogenic mechanism.

Reactive Eccrine Syringofibroadenomatosis Associated With Venous Leg Ulcers: A Case Report and Literature Review

Eccrine syringofibroadenoma (ESFA) is a rare adnexal tumor deriving from the acrosyringeal portion of the eccrine duct. Five subtypes of ESFA were described including a reactive form. Reactive ESFAs are associated with inflammatory and neoplastic dermatoses. In this article, we report the case of a 90-year-old woman presenting with 3 leg ulcers evolving for 2 years surrounded by large verrucous and eczematous lesions. Multiple skin biopsies showed anastomosing epithelial cords connected to the epidermis consistent with ESFA. We identified 8 cases of ESFA associated with chronic leg ulcers in the literature and reviewed their main clinical and histological features.

Reactive Eccrine Syringofibroadenoma (ESFA) in Association With a Merkel Cell Carcinoma Excision Scar

ABSTRACT

Eccrine syringofibroadenoma (ESFA) is a rare benign skin adnexal lesion of the acrosyringium of eccrine sweat ducts. Reactive ESFA, a subtype of ESFA, is usually associated with non-neoplastic cutaneous dermatoses or neoplastic skin tumors. Clinically, the lesions can be solitary or multiple, pink, or skin-colored coalescing papules or nodules of variable sizes. Histopathologically, this tumor is composed of numerous anastomosing cords of monomorphic cuboidal epithelial cells with eccrine duct formation. The association of reactive ESFA with benign conditions, such as psoriasis, diabetic polyneuropathy, scars, and leprosy, has been reported. However, the association of reactive ESFA with malignant tumors is extremely rare, with very few cases reported in the literature. We present a case of a 72-year-old woman who developed reactive ESFA associated with Merkel cell carcinoma excision scar. The ESFA tumors developed in the area of the surgical graft 10 months after the Merkel cell carcinoma had been excised. New ESFA tumors have continued to appear in the scar on a yearly basis while, so far, has been no recurrence of the original tumor. However, the presence of new tumor growths in the area suggested the possibility of recurrence of the Merkel cell carcinoma. That possibility was enhanced by the fact that PET scans revealed hypermetabolic activity in the ESFA papules.

A case report of reactive solitary eccrine syringofibroadenoma

Eccrine syringofibroadenoma is a very rare benign tumour of acrosyringium of eccrine sweat duct. Based on the evidences of known etiological factors, two forms have been proposed; reactive and nonreactive. Reactive forms are rarer, and on even rarer occasions, trauma complicated by secondary nonspecific infections may lead to the development of reactive eccrine syringofibroadenoma, as in our case. Here, we are documenting a case of reactive solitary eccrine syringofibroadenoma in a 65-year-old male presenting with coalescing, firm, pinkish, verrucous nodules and painful deep ulceration on the right sole preceded by trauma and secondary infection. Histopathologic revelation of distinctive microscopic findings confirmed the diagnosis in our case.

A Solitary Facial Nodule with an Uncharacteristic Histopathology

Collision or contiguous tumors refer to the combined existence of two or more tumors in a single lesion. In the skin, these growths could closely mimic other cutaneous tumors, thus making diagnosis difficult. We hereby report a dual tumor, comprising pilomatricoma, and eccrine syringofibroadenoma, which to the best of our knowledge have not been previously reported in medical literature.