Congenital malformations, deformities, and chromosomal abnormalities (Q00-Q99).
- Darier’s disease (dyskeratosis follicularis vegetans) – genetic skin disorder with autosomal dominant inheritance associated with the formation of papules, redness, and swelling.
- Nevus araneus (synonyms: Nevus stellatus; spider nevus, star nevus, or vascular spider or Eppinger’s star, spider nevus, spider nevi) – change occurring in children or in advanced liver disease, in which a central papule is surrounded by star-shaped venules (small veins).
- Tuberous sclerosis (Bourneville-Pringle disease) – autosomal dominant genetic disorder associated with malformations and tumors of the brain, skin lesions, and usually benign (benign) tumors in other organ systems
Blood, blood-forming organs – immune system (D50-D90).
- Sarcoidosis (synonyms: Boeck’s disease; Schaumann-Besnier’s disease) – systemic disease of connective tissue with granuloma formation (skin, lungs, and lymph nodes).
Skin and subcutaneous (L00-L99).
- Acanthosis nigricans – dirty brown to gray skin lesions, usually bilateral symmetrical in axillae, flexures, and neck and genital areas.
- Acne
- Granulomatous rosacea – chronic inflammatory skin disease that manifests itself on the face; form of rosacea that is mainly noticeable by brownish-red papules.
- Keratosis pilaris (rubbing skin).
- Lichen ruber planus (nodular lichen)
- Milaria rubra (red dog) – mainly in the tropics occurring skin rash (heat pimples, sweat pimples).
- Milum (skin gravel)
- Molluscum contagiosum (dell warts)
- Pityriasis lichenoides chronica – chronic symmetrical exanthema (rash) on the trunk and extremities.
- Polymorphosis light dermatosis – a delayed light reaction of the skin associated with different efflorescences (skin changes).
- Psoriasis guttata – psoriasis with droplet-sized foci.
- Scabies (scabies)
- Seborrheic keratosis (synonyms: Age wart (seborrheic keratosis); Verruca seborrhoica; seborrheic wart.
- Pedunculate warts
- Verruca (warts)
- Xanthoma – skin lesion resulting from increased storage of plasma lipoproteins in the skin in the context of hyperlipoproteinemias.
Infectious and parasitic diseases (A00-B99).
- Anthrax
- Pediculosis capitis (synonyms: head lice infestation, pediculosis due to Pediculus humanus capitis) – refers to infestation of the scalp with the head lice (Pediculus humanus capitis).
- Pulicosis (flea infestation) – here: usually multiple, grouped standing in rows or asymmetrically arranged papules.
- Syphilis (lues, venereal disease).
- Toxoplasmosis – infectious disease caused by Toxoplasma gondii, which belongs to the protozoa.
- Viral infections, unspecified (e.g. varicella (chickenpox)).
Neoplasms – tumor diseases (C00-D48).
- Age hemangioma (hemangioma).
- Basal cell carcinoma (BCC; basal cell carcinoma), early form (pale papule (to pale nodule/nodule), which not infrequently has a depression in the center and is further bulging wall-like on the outside)
- Kaposi’s sarcoma (pronounced [ˈkɒpoʃi] – “Kaposchi”) – a tumor disease occurring mainly in connection with AIDS, the cause of which is most likely due to human herpes virus type 8 (HHV-8) in conjunction with cofactors (immunosuppression, environmental factors, and oxidative and nitrosative stress). The disease is manifested by the appearance of brown-bluish tumor nodules from which plaque-like and nodular tumors develop. In case of truncal infestation usually exanthematous spreading of the skin lesions. In addition, lymph nodes are affected; less frequently, the gastrointestinal tract, liver, lungs or heart are affected. Men are more frequently affected than women. In the AIDS-associated form, brown-bluish spots multifocal usually also appear on the skin of the legs and arms.
- Malignant melanoma (black skin cancer).
Injuries, poisoning, and other consequences of external causes (S00-T98).
- Insect bites
