centimeters), gray-to-pink nodules that lie underneath the skins epidermis in the head, neck, trunk, arms, or legs. However, these nodules have been reported to be as large as 6 cm and to occur in other hair follicle-containing cutaneious sites such as the vulva, breast, and breast nipple. Areas of the skin that do not have hair follicles (e.g. palms of the hands and soles of feet) do not develop these nodules. Less than 2% of cases present with more than one nodule; the multiple nodules in SA tend to array in a linear, blaschkoid (i.e. V-, U-, or inverted U-shaped), or zosteriform (i.e. belt- or girdle-shape tracking an area of skin served by a sensory nerve) patterns. Giant vascular eccrine spiradenomas are larger (> 2 cm) and more highly vascular variants of SA that usually develop at the same cutaneous sites as SA but have also been reported to occur in the abdomen and scrotum. No malignant giant vascular SA has been described in the literature to date (2021).A recent review of 182 cases reported that spiradenocarcinomas were diagnosed in individuals 8–89 years old (mean 57.4 years). These SAC tumors developed in SA tumors that had existed for 0–720 months (mean 168.5 months); 14.4% of individuals were diagnosed with multiple carcinoma lesions. (Multiple SAC lesions may appear as a nodule associated with smaller satellite nodules.) The lesions occurred on the trunk (32.3% of cases), limbs (31.3%), head or neck (30.7%), and genitalia (1.6%).
In a review of 136 reported cases treated for SA or SAC: 1) 4.4% and 14.7% of individuals with SA and SAC tumors, respectively, had died (time between treatment and death was not reported); 2) patients who presented with metastasis to distant tissues had a median survival time of 16 months (11 of these patients were treated with adjuvant therapy in addition to surgery [adjuvant treatments included 5 patients treated with radiotherapy, 3 treated with chemotherapy, and 2 treated with both radiotherapy and chemotherapy]); and 3) Surgery with adjuvant therapy yielded a median survival time of 20 months (this survival time did not significantly differ from that found in individuals treated with surgery alone). See also
Malignant acrospiroma
List of cutaneous conditions
Dermal cylindroma
Trichoepithelioma
CYLD cutaneous syndrome
List of cutaneous neoplasms associated with systemic syndromes

References


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