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Histologic Diagnosis of Inflammatory Skin Diseases

Topography and Regional Variation

…ne and eccrine glands (Fig. 1.12). Erectile tissues, such as clitoris and penis, are endowed with highly vascularized smooth muscles. Figure 1.13 Ostia of infundibula on the skin of the nose, a region in which those openings in adults may be…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Origin of Adnexal Neoplasms?

…e the origin of adnexal neoplasms, i.e., whether they derive from follicles, sebaceous units, apocrine units, eccrine units, muscles, nerves, or vessels (blood or lymphatic); only the direction of differentiation can be inferred. On the basis of…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Psychocutaneous Disorders?

…mmy palms) of fear? And who has not developed “goose pimples” as a consequence of the involuntary pull of smooth muscles on hair follicles in response to powerful emotions? Skin contains nerves that are integral to the peripheral nervous…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Follicular Degeneration Syndrome?

…icles; complete destruction eventually of follicles with replacement of them by “dense collagen”, and sparing of muscles of hair erection. On the basis of what has been written by LoPresti et al. and by Sperling, however, some…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eruptive Vellus Hair Cyst?

…ds and ducts, are affiliated with the cyst. Episodically, a nonepithelial component appears in the hamartoma, namely, smooth muscles of hair erection. What has been named “eruptive vellus hair cyst” has all of the constituents of classic…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Eccrine Neoplasms?

…dnexa are folliculo-sebaceous-apocrine units on one hand and eccrine units on the other; the nonepithelial adnexa are smooth muscles, nerves, and blood vessels. Each of those normal adnexal structures has its own distinctive histologic attributes…

Resolving Quandaries in Dermatology, Pathology & Dermatopathology

Dermal Papilla?

…he base of an isthmus at the outset of anagen. Bulges are unaccompanied by a follicular papilla; they are attached to smooth muscles. In summary, studies histologic of normal human follicles led us to conclude that the bulge is a structure very…

On the nature of thought processes and their relationship to the accumulation of knowledge, Part XV-Limits to cognition: epistemic, random, or both?

On the nature of thought processes and their relationship to the accumulation of knowledge, Part XV-Limits to cognition: epistemic, random, or both?

…s. Visual saccades (the quick component of eye movements) are controlled by a number of neural circuits that control the six muscles within the orbit that move the eye so that gaze can be stabilized and aligned to compensate for the animal’s…

Differential Diagnosis in Dermatopathology

Differential Diagnosis

…No very widely dilated, abnormal vascular structures 5. Smooth muscle in the wall of vein-like structures often 5. No smooth muscles in the wall of vessels 6. Abundant mucin in the wall of vein-like structures 6. No mucin in the wall of vessels 7….