Two cases for diagnosis: asymmetric childhood scleredema or stiff skin syndrome?

New clinical classification of stiff skin syndrome

BACKGROUND

Stiff skin syndrome (SSS) is a rare disease characterized by thickened, indurated skin and limited joint movement. Multiple diverse phenotypes have been reported, and the correlation of severity with the clinical heterogeneity and histopathological findings of SSS needs to be refined.

OBJECTIVE

To define subtypes based on clinical features and predict the prognosis of a new SSS classification.

METHODS

Eighty-three patients with SSS were retrospectively reviewed for clinicopathological manifestations and routine laboratory workup, including 59 cases obtained from a PubMed search between 1971 and 2022 and 24 cases diagnosed in our department between 2003 and 2022.

RESULTS

Among the 83 patients, 27.7, 41, and 31.3% had classic widespread, generalized segmental, and localized SSS, respectively. Joint immobility was present in 100, 71, and 20% of classic, generalized, and localized cases, respectively. Histopathologic findings were common among the 3 groups, and based on that, we further found a difference in the distribution of proliferative collagen. 54.5% of classic and 50% of generalized cases occurred throughout the dermis or the subcutis, whereas 76% of localized cases were mainly involved in the reticular dermis or subcutis. In patients with incipient localized SSS, 42% (21/50) developed generalized SSS, and only 6% (3/50) progressed to classic SSS, whereas more than half of the incipient generalized SSS cases (60.6%, 20/33) developed classic SSS.

LIMITATIONS

This retrospective study was limited to previously published cases with limited data.

CONCLUSIONS

We propose a distinct clinical classification characterized by lesion distribution, including classic widespread, generalized segmental, and localized SSS, associated with disease severity and prognosis.

Face and neck swelling in a 16-year-old boy

Scleredema adultorum is a rare condition characterised by progressive collagen and mucin deposition in the skin. While the aetiology has not been clearly delineated, the condition is often associated with common infections. The current report describes a previously healthy 16-year-old boy who presented with 3 weeks of progressive neck swelling and skin induration. He had evidence of both active streptococcal and Ebstein-Barr virus (EBV) infections. Skin biopsy confirmed the diagnosis of scleredema. The patient was treated for his streptococcal infection, but otherwise managed conservatively. Clear improvement in the signs and symptoms was seen at a 3-month follow-up appointment. Scleredema can be a complication of streptococcal infection but to our knowledge has not been reported in association with EBV. It should be considered in the differential diagnosis of any patient presenting with cutaneous/subcutaneous induration and swelling of the face and/or neck.

Stiff skin syndrome--case report

Stiff skin syndrome is a rare scleroderma-like disorder of unknown etiology characterized by stone-hard indurations of skin, mild hypertrichosis and limited joint mobility. No effective treatment has yet been found. Exercises and rehabilitative therapy are important in maintaining the patient's quality of life. The authors present a case of a two-year-old boy with progressive skin hardening since he was eight-month old and secondary restricted joint mobility, diagnosed as Stiff skin syndrome.

Stiff skin syndrome

Stiff skin syndrome is a rare disorder characterized by pronounced skin induration, mild hypertrichosis and limited joint mobility, predominantly on the buttocks and thighs. Many heterogeneous cases have been reported under the name of stiff skin syndrome. We present a case of stiff skin syndrome from China, the diagnosis based on the patient's typical clinical and histopathological features.