being common to both ; in the acute form more or less extensive cellulitis is coexistent with the nodules. Fibromata of the skin are developed either from the cutis or the subcutaneous tissue, often multiple, sometimes very dense (fibroma durum), sometimes softer (fibroma molluscum). The former consist of tough dense connective tissue and contain, where the formation is most recent, spindle and round cells. In the recent forms, the fibres of connective tissue are not so closely interwoven but form a coarse network, the interspaces of which are occupied by a still finer network, which in its turn contains a quantity of yellowish albuminous fluid. That growth to which Alibert gave the name keloid is also classed with the fibromata. Its most common seat is over the sternum where it takes the form of divergent bands of fibrous tissue elevated above the surface and more or less rich in cells; this tissue is finally transformed into a species of cicatrix.
Sarcomata may be primary in the skin, equaling the head in size; when very large they are generally coarsely lobulated. They often assume the shape of a mushroom. The majority of them and especially those which are superficial are hard and consist of spindle cells but those which spring from the subcutaneous tissue are often composed of small cells. These tumors sometimes spring from ulcers, chronic ulcers of the leg for instance, as may be recognized by the presence of irregular brownish cicatrices of old ulcers in the immediate neighborhood.
True carcinomata of the skin are always secondary and occur in the form of nodules from the size of a hemp seed to that of a walnut. Their origin may be metastatic (through the blood current) or by contiguity as accessory nodules. The latter are most commonly met with near the gland in connection with cancer of the breast, often very numerous and extending over a large surface.
The last division of malignant new growths is formed by the epitheliomata occurring in two different forms chiefly found at the junction of mucous membranes with the skin also on the face and scalp. The infiltrating form is more common occurring chiefly on the face; it is seated in the cutis, elevated but little above the surface.
The only parasitic affections of the skin which we shall mention are those caused by vegetable parasites such as pityriasis versicolor found chiefly on the chest neck and back giving rise to roundish and isolated or large irregular and confluent groups of brownish spots covered by scaly epidermis. The color as well as the scales can be removed by scratching a peculiarity which distinguishes this affection from true pigmentation of the deeper layers of the epidermis chloasma.
Congenital malformations in the skin are mostly due to defective union between the lateral epidermal plates resulting in fissures. Hare-lip is the commonest instance of this. A fissure of the chest or sternum may also occur. The abdominal fissure when extensive is associated with prolapse of the abdominal viscera eventration.
<Callout type="warning" title="Warning: Skin Cancer Signs">It's crucial to recognize early signs of skin cancer such as persistent nodules, changes in existing moles, or new growths.</Callout>
The three great cavities of the body should be examined in their successive order from above downward. The abdominal is actually opened before the thoracic cavity but is examined later. In medico-legal cases, if it seems likely that by turning over the body we might essentially modify the relative position of parts such as incised wounds, the vertebral canal should be left to the last and generally the chest and abdomen should be opened before the head.
Key Takeaways
- Fibromata can develop from cutis or subcutaneous tissue and vary in density.
- Sarcomata often originate from ulcers and are commonly found on the face.
- True carcinomata of the skin are secondary growths, usually nodular and may be metastatic.
- Epitheliomata occur at mucous membrane-skin junctions and can present as infiltrating or warty forms.
Practical Tips
- Regular self-examination for unusual skin growths is crucial for early detection of potential malignancies.
- Consult a dermatologist if you notice any changes in your skin's appearance, especially concerning moles or lesions.
Warnings & Risks
- Ignoring persistent nodules or new growths on the skin can lead to delayed diagnosis and treatment of serious conditions like cancer.
- Failure to recognize early signs of congenital malformations such as hare-lip can result in inadequate medical intervention.
Modern Application
While this chapter focuses on historical pathological anatomy, understanding the nature and presentation of various skin tumors remains crucial today. Modern diagnostic tools have advanced significantly but recognizing basic characteristics from descriptions like those here aids in early detection and treatment.
Frequently Asked Questions
Q: What are fibromata?
Fibromata are developed either from the cutis or subcutaneous tissue, often multiple, sometimes very dense (fibroma durum), sometimes softer (fibroma molluscum). They consist of tough dense connective tissue and contain spindle and round cells.
Q: How do sarcomata typically present?
Sarcomata may be primary in the skin, equaling the head in size; when very large they are generally coarsely lobulated. They often assume the shape of a mushroom and are seated in the cutis, elevated but little above the surface.
Q: What distinguishes true carcinomata from other growths?
True carcinomata of the skin are always secondary and occur in the form of nodules from the size of a hemp seed to that of a walnut. Their origin may be metastatic or by contiguity as accessory nodules, often very numerous near the gland in connection with cancer of the breast.