Alopecia Mucinosa/Follicular Mucinosis Robert A. Lee DEFINITION Alopecia mucinosa (AM) and follicular mucinosis (FM) refer to the same entity. AM describes the clinical manifestation, whereas FM denotes the classic histopathologic…
Cutaneous Lupus Erythematosus Ilana S. Rosman INTRODUCTION Lupus erythematosus is a complex multisystem inflammatory condition with a variety of cutaneous manifestations. A complete discussion of the clinical and histologic findings…
CD30 Pseudolymphomas Jacqueline M. Junkins-Hopkins DEFINITION Cutaneous pseudolymphomas (CPLs) are benign lymphocytic infiltrates of the skin, which microscopically and immunophenotypically simulate cutaneous lymphoma, and yet do not have clinical corroboration…
Chronic Actinic Dermatitis—Actinic Reticuloid Sena J. Lee András Schaffer DEFINITION Chronic actinic dermatitis (CAD) is a unifying term for eczematous photodermatoses lasting for more than 3 months with abnormal sensitivity…
Pigmented Purpuric Dermatoses Casey A. Carlos DEFINITION The pigmented purpuric dermatoses (PPDs) are benign inflammatory conditions predominantly occurring in adults on the lower extremities. There are several variants, including Schamberg…
Pityriasis Lichenoides Chronica Emily Y. Chu DEFINITION, CLINICAL PRESENTATION, AND PROGNOSIS Pityriasis lichenoides chronica (PLC) is a benign, self-limited, diffuse skin eruption composed of discrete red–brown scaly papules (Fig. 37-1)….
Cutaneous Involvement by Hodgkin Lymphoma Alejandro A. Gru András Schaffer DEFINITION Hodgkin lymphoma (HL) is a clonal lymphoproliferative disease of germinal center B-cell origin. Lymph nodes of the cervical (75%…
Cutaneous Plasma Cell Neoplasms Liaqat Ali Jozef Malysz INTRODUCTION Plasma cell neoplasms (PCN) include a spectrum of diseases that ranges from clinically indolent entities, such as monoclonal gammopathy of unknown…
Cutaneous Manifestations of Chronic Lymphocytic Leukemia/Small Lymphocytic Lymphoma Alejandro A. Gru DEFINITION Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) is the most common adult leukemia in Europe and North America, with…
Cutaneous Mantle Cell Lymphoma Alejandro A. Gru DEFINITION Mantle cell lymphoma (MCL) is a B-cell non-Hodgkin lymphoma (NHL) that comprises approximately 3% to 10% of the systemic B-cell NHL.1,2,3,4 It…
