Amyloses cutanées

[Multifocal chalazodermic amyloidosis: The concept of immunoglobulinemic elastopathy]

INTRODUCTION

Impairment of dermal elastic tissue occurs in different entities associated with immunoglobulins or immunoglobulin-derived protein-secreting clonal plasma cell proliferations, such as amyloid elastosis, anetodermic nodular amyloidosis or monoclonal gammopathy-associated cutis laxa. We report a case of cutaneous immunoglobulinemic amyloidosis revealed by a unique chalazodermic presentation and we review elastic tissue impairment in patients with monoclonal gammopathies.

OBSERVATION

A 67-year-old woman consulted for non-infiltrated anetodermic lesions on the upper left quadrant of her abdomen present for ten years. She also had a chalazodermic plaque with abnormal skin wrinkling and laxity in her right axilla. Biopsies revealed deep dermal and subcutaneous amyloid deposits. Immunohistochemistry with lambda light chain was positive. Orcein staining and electron microscopy showed extensive elastolysis. The patient presented no signs of systemic involvement, but a very small amount of monoclonal IgGλ gammopathy was detected during follow-up.

DISCUSSION

This is a unique chalazodermic presentation of immunoglobulinemic amyloidosis that does not fit into a clearly-defined nosological setting. It highlights the complex interactions between immunoglobulin-derived proteins, including light and heavy chains, and elastic tissue components, leading to different types of impairment of the latter. We therefore suggest the unifying concept of immunoglobulinemic elastopathy, underscoring the need to screen for monoclonal gammopathy in patients presenting elastic tissue impairments.

[Pseudo-condylomatous neurodermatitis of the anal margin]

Cerebral venous thrombosis (CVT) is a rare origin of stroke, the clinical presentation and etiologies vary. The prognosis is shown to be better compared to arterial thrombosis. Magnetic Resonance Imaging (MRI) and MR Venograpgy (MRV) are currently important tools for the diagnostic. We studied 30 cases of CVT diagnosed in the department of neurology of the University Hospital of Fez (Morocco). Patients diagnosed with CVT signs between January 2003 and October 2007 were included in the study. Cerebral CT-scan was performed in 27 cases (90%) while the MRI examination was done in 18 patients (67%); and most patients (90%) received anticoagulant therapy. The mean age of our patients was of 29 years (age range between 18 days and 65 years). A female predominance was observed (70%). The clinical presentation of patients was dominated by: headache in 24 cases (80%), motor and sensory disability in 15 cases (50%), seizures in 10 cases (33%) , consciousness disorder in 10 cases (33%). CVT was associated to post-partum in 10 cases (33%), infectious origin in 8 cases (26%), Behcet disease in 2 cases (7%), pulmonary carcinoma in 1 case, thrombocytemia in 1 case and idiopathic in 7 cases (23%). The evolution was good in 20 cases (67%), minor squelaes were observed in 6 patients (20%), while major squelaes was observed in 2 cases. Two cases of death were registered. The CVT is a pathology of good prognosis once the diagnosis is promptly established and early heparin treatment initiated.

Diseases mimicking onychomycosis

The diagnosis of onychodystrophy has increased in dermatology consultation. This could be due to its esthetic effect, pain or disability, physician awareness for detecting the disease in the context of dermatologic or systemic diseases, or a greater incidence. One of the first differential diagnoses that should be considered when an onychodystrophic nail is observed is onychomycosis, which is the cause in 50% of cases.

Atteinte unguéale et infiltration sclérodermiforme du visage au cours d’une amylose systémique

INTRODUCTION

Mucocutaneous involvement in systemic amyloidosis occurs in 29 to 40 p. 100 of cases. Nail abnormalities are infrequent in AL amyloidosis. We report an original case of AL amyloidosis associated with cutaneous and integument alterations and scleroderma-like infiltration of the face.

CASE REPORT

A 73 year-old woman was hospitalized because of weight loss and asthenia. She had been treated 4 years earlier with chemotherapy for a IgG-type multiple myeloma with complete resolution of the underlying monoclonal gammapathy. Cutaneous examination showed nail dystrophy of all fingernails associated with scleroderma-like skin changes on the chin and lips. Histopathologic study of a chin biopsy confirmed the presence of amyloid deposits in the dermis. Laboratory data were normal, without signs of recurrence of multiple myeloma.

DISCUSSION

We report an original case of a patient who developed two unusual cutaneous manifestations associated with AL amyloidosis. Moreover, there was no correlation between the severity of the cutaneous lesions and the extent of the underlying hematological disease.