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NEET MDS Shorts

16839
Periodontics

If a laterally positioned flap is not properly designed or secured, it can lead to complications such as tearing or failing to fully cover the dehiscence, potentially causing a new dehiscence at the donor site.

19764
INI CET

In X-linked dominant inheritance, an affected father passes the X-linked trait to all of his daughters but none of his sons. [Image of X-linked dominant inheritance pattern]

94937
Periodontics

Fanconi’s syndrome is a disorder of the proximal renal tubules in the kidney, resulting in the failure to reabsorb glucose, amino acids, uric acid, and phosphates, which are then lost in the urine. It is primarily a metabolic and renal condition and does not involve the melanocyte-stimulating pathways required for hyperpigmentation.


 Addison’s Disease (Adrenal Insufficiency)
Mechanism: Primary adrenal failure leads to a lack of cortisol, which triggers the pituitary gland to overproduce ACTH (Adrenocorticotropic Hormone).
Pigmentation: Because ACTH shares a precursor (POMC) with Melanocyte-Stimulating Hormone (MSH), high levels of ACTH directly stimulate melanocytes.
Clinical Sign: This causes diffuse, "bronzing" hyperpigmentation of the skin (especially at pressure points/scars) and patchy brown/black macules on the oral mucosa (buccal mucosa and gingiva). 

Peutz-Jeghers Syndrome
Mechanism: An autosomal dominant genetic disorder caused by mutations in the STK11 gene.
Pigmentation: It is characterized by pathognomonic melanotic macules (1–5 mm freckle-like spots) appearing early in childhood.
Clinical Sign: These spots are most prominent on the lips (vermilion border), perioral skin, and buccal mucosa. They are often the first sign of the syndrome, which also involves gastrointestinal hamartomatous polyps. 

McCune-Albright Syndrome
Mechanism: A complex genetic disorder involving polyostotic fibrous dysplasia and endocrine hyperfunction.
Pigmentation: It features characteristic café-au-lait macules.
Clinical Sign: These are typically large, unilateral, and have irregular "Coast of Maine" borders. While primarily cutaneous, they are a classic example of syndromic melanin hyperpigmentation. 

44070
General Medicine

Pulsus paradoxus is a clinical sign characterized by a drop in blood pressure during inspiration. It is commonly seen in conditions like asthma, where airway obstruction leads to significant changes in intrathoracic pressure.

24654
Anatomy

The medial pterygoid muscle is attached to the medial surface of lateral pterygoid plate

21307
Oral Surgery

Dislocation is treated by forcing the mandible downwards and backwards.

38466
Periodontics

A Gracey curette is correctly adapted when the lower shank is parallel with the tooth surface being scaled.

66999
General Microbiology

The primary mode of action of exotoxins is enzymatic, as they often act as enzymes that modify or damage host cell functions.

22463
Physiology

The primary function of bile acids in the intestine is the emulsification of dietary fat, which aids in fat digestion and absorption.

84563
INI CET

Osteogenesis imperfecta is a genetic collagen disorder that results in extreme bone fragility. Multiple fractures seen in utero on ultrasound are a hallmark of severe forms (Type II) of this condition.

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